Notebookcheck

Dell XPS 15 9575 (i7-8705G, Vega M GL, 4K UHD) Convertible Review

Higher price, same CPU performance. The Core i5 XPS 15 9575 impressed us in terms of raw performance and graphical prowess for such a thin convertible. The Core i7 SKU performs just as well, albeit at very marginal benefits. For better or worse, the differences between the i5 and i7 SKUs are smaller than we had anticipated.

Working For Notebookcheck

Are you a techie who knows how to write? Then join our Team!

Currently wanted: 
News Editor - Details here

We reviewed our first XPS 15 9575 SKU just a few weeks ago and its performance surprised us. Not only are the Core i5-8305G CPU and Radeon RX Vega M GL GPU comparable to the Core i7-7700HQ and GTX 1050, respectively, the thinner XPS 15 9575 even manages to run cooler and quieter than the thicker XPS 15 9560 that it derives from.

For our second look at the XPS 15 9575, we want to see what benefits the Core i7-8705G SKU can bring to the table over the i5-8305G SKU. Both processors are equipped with the same Vega M GL GPU, but Dell is locking both the 4K UHD touchscreen and 16 GB RAM options for the Core i7 configuration only. As a result, our test unit today retails for over $2200 USD compared to just $1500 USD for our original Core i5 XPS 15 9575 unit. Does the extra performance justify the price differential?

We recommend checking out our original review on the Core i5 XPS 15 9575 SKU for more information on the chassis and its features. The XPS 15 9575 is Dell's premier 15-inch XPS convertible and the first with MagLev keyboard keys, GORE insulation, and Kaby Lake-G all in a laptop.

Dell XPS 15 9575 i7-8705G (XPS 15 Series)
Graphics adapter
AMD Radeon RX Vega M GL / 870 - 4096 MB, Core: 1011 MHz, Memory: 700 MHz, HBM2, 1.0.2.1
Memory
16384 MB 
, DDR4, 1300 MHz, Dual-Channel, 17-17-17-39
Display
15.6 inch 16:9, 3840 x 2160 pixel 282 PPI, 10-point capacitive, native pen support, Sharp SHP148D, IPS, Name: LQ156D1, Dell P/N: FNVDR, glossy: yes
Mainboard
Intel QM175 (Skylake PCH-H)
Storage
SK hynix PC401 NVMe 500 GB,  GB 
Soundcard
Intel Skylake PCH-H High Definition Audio Controller
Connections
4 USB 3.0 / 3.1 Gen1, 2 Thunderbolt, Audio Connections: 3.5 mm combo, Card Reader: MicroSD, 1 Fingerprint Reader, Sensors: Gyroscope
Networking
Killer Wireless-n/a/ac 1435 Wireless Network Adapter (a/b/g/n/ac), Bluetooth 4.1
Size
height x width x depth (in mm): 16 x 354 x 235 ( = 0.63 x 13.94 x 9.25 in)
Battery
75 Wh Lithium-Polymer, 6-cell
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: 720p
Additional features
Speakers: Stereo 1 W x 2, Keyboard: MagLev chiclet, Keyboard Light: yes, Dell Premium Active Pen (PN579X), Warranty card, USB 3.0 Type-C to Type-A adapter, Dell Update, McAfee Anti-Virus, PremierColor, 12 Months Warranty
Weight
2 kg ( = 70.55 oz / 4.41 pounds), Power Supply: 370 g ( = 13.05 oz / 0.82 pounds)
Price
2200 USD

 

Size Comparison

SDCardreader Transfer Speed
average JPG Copy Test (av. of 3 runs)
Eurocom Sky X9C
 
191.05 MB/s ∼100% +38%
Dell XPS 15 9575 i7-8705G
 
138 MB/s ∼72%
Dell XPS 15 9560 (i7-7700HQ, UHD)
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
120.5 MB/s ∼63% -13%
Gigabyte Aero 14-K8
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
79 MB/s ∼41% -43%
maximum AS SSD Seq Read Test (1GB)
Dell XPS 15 9560 (i7-7700HQ, UHD)
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
252.6 MB/s ∼100% +26%
Eurocom Sky X9C
 
207.93 MB/s ∼82% +4%
Dell XPS 15 9575 i7-8705G
 
200.36 MB/s ∼79%
Gigabyte Aero 14-K8
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
87 MB/s ∼34% -57%
Networking
iperf3 Client (receive) TCP 1 m 4M x10
Lenovo Yoga 720-15IKB-80X7
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
662 MBit/s ∼100% +3%
Dell XPS 15 9575 i7-8705G
Killer Wireless-n/a/ac 1435 Wireless Network Adapter
640 MBit/s ∼97%
Acer Swift 3 SF315-41-R6J9
Qualcomm/Atheros QCA6174
564 MBit/s ∼85% -12%
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
461 MBit/s ∼70% -28%
iperf3 Client (transmit) TCP 1 m 4M x10
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
666 MBit/s ∼100% +28%
Dell XPS 15 9575 i7-8705G
Killer Wireless-n/a/ac 1435 Wireless Network Adapter
521 MBit/s ∼78%
Lenovo Yoga 720-15IKB-80X7
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
512 MBit/s ∼77% -2%
Acer Swift 3 SF315-41-R6J9
Qualcomm/Atheros QCA6174
333 MBit/s ∼50% -36%

Warranty

The standard one-year limited warranty applies with options of up to 4 years of Premium Plus coverage.

Input Devices

Keyboard & Touchpad

As mentioned before, the MagLev keyboard will take some time to become accustomed to because it feels very different from the usual membrane-based keyboards found on most Windows laptops. Travel is extremely shallow (0.7 mm) to give an experience more akin to a MacBook that users will either love or hate. We can, however, appreciate the fact that feedback is uniform and very consistent between each main key. We wish the Function keys and Arrow keys could have been larger as the super-short travel pairs poorly with their small sizes.

The included WACOM Premium Active Pen (PN579X) is 15 cm in length with 4096 levels of pressure sensitivity and a 240 Hz report rate as defined by the AES 2.0 standard. The top button and two side buttons are used to launch applications and pair with the system. Unfortunately, the side buttons have weak feedback when pressed compared to the Microsoft Surface Pen and they could have benefited from a firmer feel. Unlike on the older Dell Active Stylus Pen, the newer Premium Active Pen has no pen hook near the top for clamping onto clothing or paperwork. Instead, the stylus relies on a magnet to stick onto objects and along the edge of the XPS system.

There appears to be no replacement pen tips at the time of writing.

If you love the XPS 15 9560 keyboard, then be prepared to readjust all over again on the MagLev XPS 15 9575
If you love the XPS 15 9560 keyboard, then be prepared to readjust all over again on the MagLev XPS 15 9575
The side rocker keys on the active pen are too soft in feedback
The side rocker keys on the active pen are too soft in feedback
Ribbons or ties can be looped through the cap of the pen
Ribbons or ties can be looped through the cap of the pen
Don't pull on the tie loop too hard, however, as the cap can be easily pulled off on accident
Don't pull on the tie loop too hard, however, as the cap can be easily pulled off on accident

Display

Much like the XPS 15 9560, the XPS 15 9575 includes FHD and 4K UHD options with panels provided by Sharp. Workstation laptops like the Precision 5510 and Lenovo ThinkPad P50 carry very similar 4K UHD panels as our XPS 15 9575 since they all share the same LQ156D1 identification. Subjectively, texts and images are crisp and free of grains just like on the XPS 15 9560. When compared to the FHD SKU of the XPS 15 9575, the 4K panel here is brighter on the center but with poorer backlight uniformity. In other words, the 4K UHD screen is dimmer around the edges and corners compared to the FHD SKU. Black-White response times are still moderately slow especially when compared to the 5 ms and 7 ms panels found on newer gaming notebooks.

One major oddity we must mention is its smaller-than-expected gamut. The 4K UHD Sharp panels on the XPS 15 9560, ThinkPad P50, and Precision 5510 can each cover >85 percent of the AdobeRGB standard and essentially 100 percent of sRGB. On the 4K UHD XPS 15 9575, however, gamut covers only 72 percent of AdobeRGB. While color coverage is still wider than on the FHD SKU, this is nowhere near the full AdobeRGB coverage that Dell is advertising even after accounting for any calculation errors. We made sure to set the PremierColor software to AdobeRGB but color coverage results remain the same.

In contrast to Dell, Gigabyte standardizes and calibrates every Aero 15 display at factory under the X-Rite Pantone color certification. Colors and grayscale for the Aero 15 series are significantly more accurate as a result since they are equipped with color profiles individually tailored to each unit. Our reviews and CalMAN results on the original Aero 15 and the latest Aero 15X V8 show that the Gigabyte systems can indeed reproduce sRGB more accurately than our Dell convertible.

Light-moderate backlight bleeding along bottom edge
Light-moderate backlight bleeding along bottom edge
RGB subpixel array (282 PPI)
RGB subpixel array (282 PPI)
We set gamut to AdobeRGB, but coverage is still only 72 percent of the AdobeRGB standard
We set gamut to AdobeRGB, but coverage is still only 72 percent of the AdobeRGB standard
Default preferences
Default preferences
424.7
cd/m²
451.3
cd/m²
396.1
cd/m²
447
cd/m²
488
cd/m²
435.2
cd/m²
431.3
cd/m²
461.9
cd/m²
424.7
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 488 cd/m² Average: 440 cd/m² Minimum: 24.11 cd/m²
Brightness Distribution: 81 %
Center on Battery: 488 cd/m²
Contrast: 1627:1 (Black: 0.3 cd/m²)
ΔE Color 3.16 | 0.4-29.43 Ø6.3
ΔE Greyscale 3.3 | 0.64-98 Ø6.5
97.9% sRGB (Argyll 3D) 71.7% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.178
Dell XPS 15 9575 i7-8705G
Sharp SHP148D, IPS, 15.6, 3840x2160
Dell XPS 15 9575 i5-8305G
Sharp SHP148E, IPS, 15.6, 1920x1080
Dell XPS 15 9560 (i7-7700HQ, UHD)
IGZO IPS, 15.6, 3840x2160
HP Spectre x360 15t-bl100
BOE06C3, IPS, 15.6, 3840x2160
Dell Precision 5510
SHP143E, 7PHPT_LQ156D1, IGZO LED, 15.6, 3840x2160
Lenovo ThinkPad P50
LQ156D1JW05, IPS, 15.6, 3840x2160
Response Times
-5%
-12%
10%
-8%
-7%
Response Time Grey 50% / Grey 80% *
48.4 (23.2, 25.2)
53.6 (26, 27.6)
-11%
57.2 (27.2, 30)
-18%
41.2 (23.2, 18)
15%
56.4 (23.2, 33.2)
-17%
39.2 (14.8, 24.4)
19%
Response Time Black / White *
34.8 (19.2, 15.6)
36.4 (19.2, 17.2)
-5%
39.2 (23.6, 15.6)
-13%
29.6 (16.4, 13.2)
15%
34 (11, 23)
2%
22 (7, 15)
37%
PWM Frequency
1000 (25)
1000 (25)
0%
961.5
-4%
1000
0%
217
-78%
Screen
-14%
-19%
-21%
-16%
-29%
Brightness middle
488
418.5
-14%
370.1
-24%
338.7
-31%
391
-20%
250
-49%
Brightness
440
391
-11%
356
-19%
325
-26%
361
-18%
250
-43%
Brightness Distribution
81
87
7%
87
7%
91
12%
87
7%
86
6%
Black Level *
0.3
0.35
-17%
0.37
-23%
0.28
7%
0.4
-33%
0.31
-3%
Contrast
1627
1196
-26%
1000
-39%
1210
-26%
978
-40%
806
-50%
Colorchecker DeltaE2000 *
3.16
3.5
-11%
5.3
-68%
4.9
-55%
4.85
-53%
4.5
-42%
Colorchecker DeltaE2000 max. *
8.8
7.57
14%
9.9
-13%
8.7
1%
9.3
-6%
Greyscale DeltaE2000 *
3.3
5.3
-61%
4.6
-39%
5.5
-67%
4.01
-22%
7.2
-118%
Gamma
2.178 110%
2.2 109%
2.31 104%
2.08 115%
2.18 110%
2.31 104%
CCT
6811 95%
7500 87%
6284 103%
7498 87%
7340 89%
6399 102%
Color Space (Percent of AdobeRGB 1998)
71.7
57.9
-19%
88.3
23%
63.5
-11%
96
34%
85
19%
Color Space (Percent of sRGB)
97.9
92.1
-6%
100
2%
86.92
-11%
100
2%
98.6
1%
Colorchecker DeltaE2000 calibrated *
2.51
Total Average (Program / Settings)
-10% / -12%
-16% / -18%
-6% / -14%
-12% / -14%
-18% / -24%

* ... smaller is better

AdobeRGB color space is smaller than on the 4K UHD panel for the XPS 15 9560 (72 percent vs. 88 percent). Despite double-checking our findings, Dell's only response is that the 4K UHD panel for the XPS 15 9575 promises 100 percent AdobeRGB coverage. Graphics artists may want to look elsewhere because of the questionable color coverage of the XPS 15 convertible.

vs. sRGB
vs. sRGB
vs. AdobeRGB
vs. AdobeRGB
vs. XPS 15 4K UHD
vs. XPS 15 4K UHD

The strange color behavior only continues with our X-Rite spectrophotometer analyses. Colors become notably more inaccurate the higher the saturation level despite having full sRGB coverage. Our automatic calibration attempts strangely do not improve upon this whereas our same procedure on other notebooks typically result in more accurate displays. In fact, setting the panel to sRGB mode through PremierColor creates a very imbalanced grayscale at the 90 percent saturation level as shown by our CalMAN results below. We're not sure why this is occurring on the 4K UHD panel and not the FHD panel, but more tuning will be necessary between PremierColor settings and Windows color profiles.

Grayscale before calibration
Grayscale before calibration
Saturation Sweeps before calibration
Saturation Sweeps before calibration
ColorChecker before calibration
ColorChecker before calibration
Grayscale after calibration on sRGB mode. Note that there is an issue displaying 90 percent grayscale accurately
Grayscale after calibration on sRGB mode. Note that there is an issue displaying 90 percent grayscale accurately
Saturation Sweeps after calibration
Saturation Sweeps after calibration
ColorChecker after calibration
ColorChecker after calibration

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
34.8 ms ... rise ↗ and fall ↘ combined↗ 19.2 ms rise
↘ 15.6 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 90 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (25.9 ms).
       Response Time 50% Grey to 80% Grey
48.4 ms ... rise ↗ and fall ↘ combined↗ 23.2 ms rise
↘ 25.2 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.9 (minimum) to 636 (maximum) ms. » 81 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (41.4 ms).

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM detected 1000 Hz ≤ 25 % brightness setting

The display backlight flickers at 1000 Hz (Likely utilizing PWM) Flickering detected at a brightness setting of 25 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 1000 Hz is quite high, so most users sensitive to PWM should not notice any flickering.

In comparison: 54 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8822 (minimum: 43 - maximum: 142900) Hz was measured.

Outdoor visibility is good when under shade and merely average when under direct sunlight. The wide viewing angles and 360-degree hinges help in reducing as much glare as possible, but glare is still inevitable on the super-glossy panel. Certain 15-inch notebooks like the Samsung NP900X5N or even the MacBook Pro 15 are equipped with brighter backlighting for a superior experience than the Dell when outdoors.

Wide IPS viewing angles
Wide IPS viewing angles
Outdoors under direct sunlight
Outdoors under direct sunlight

Quality journalism is made possible by advertising. We show the least amount of ads whenever possible. We intentionally show more ads when an adblocker is used. Please, switch off ad blockers.

Performance

There are only two CPU options for the current XPS 9575: The quad-core i5-8305G and quad-core i7-8705G. Unlike the quad-core i5-7300HQ in the XPS 15 9560, the i5-8305G sports Hyper-Threading which is key to explaining why the i5-8305G can perform so closely to the i7-8705G as our benchmarks below will show. In fact, the only major difference between the 3.1 GHz i7-8705G and 2.8 GHz i5-8305G is that the former is 300 MHz faster and with a larger L3 cache size. Otherwise, both 65 W CPUs utilize the same HD Graphics 630 and Radeon RX Vega M GL GPUs at identically rated clock rates.

It's somewhat disappointing to see no 100 W Core i7-8809G options as this particular processor brings notable gains in both CPU and GPU power over the 65 W CPU options in the current XPS 15 convertible lineup. The cooling solution of the notebook was not likely designed to handle the more demanding i7-8809G.

Once again, it's important to note that RAM is soldered and not user upgradeable unlike on the XPS 15 9550/9560/9570 series.

Processor

The Core i7-8705G is within a few percentage points from the Core i5-8305G in both single- and multi-threaded workloads according to CineBench. The delta is so insignificant compared to the price difference between the Kaby Lake-G Core i5 and Core i7 SKUs that most users will not even notice the minuscule benefits of the Core i7 CPU. With that said, its performance is still comparable to the Core i7-7700HQ CPU as found on the XPS 15 9560 and most Kaby Lake gaming notebooks of 2017. The Core i7-8750H currently shipping on the latest XPS 15 9570 is about 50 percent faster than our XPS convertible in multi-threaded workloads while the i7-8809G can be almost 25 percent faster.

Running CineBench R15 Multi-Thread in a loop results in an initial high score of 749 points before stabilizing in the 680 range to represent a performance drop of about 9 percent. In comparison, the i5-8305G SKU is able to achieve an initial high score of 710 points before stabilizing at about 670 to represent a drop of almost 6 percent. Though these dips are relatively minor, neither of these processors can maintain maximum Turbo Boost for more than just 30 seconds or so at best.

See our dedicated page on the Core i7-8705G CPU for more technical information and benchmarks.

CineBench R10 32-bit
CineBench R10 32-bit
CineBench R11.5 64-bit
CineBench R11.5 64-bit
CineBench R15
CineBench R15
0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360370380390400410420430440450460470480490500510520530540550560570580590600610620630640650660670680690700710720730740750Tooltip
Cinebench R15 CPU Multi 64 Bit
Cinebench R15
CPU Single 64Bit
Eurocom Tornado F5
Intel Core i7-7700K
190 Points ∼92% +9%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
178 Points ∼86% +2%
Gigabyte Aero 14-K8
Intel Core i7-8750H
175 Points ∼85% +1%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
174 Points ∼84%
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
165 Points ∼80% -5%
Dell Latitude 13 7380
Intel Core i7-7600U
161 Points ∼78% -7%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
157 Points ∼76% -10%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
157 Points ∼76% -10%
Dell XPS 15 2017 9560 (7300HQ, Full-HD)
Intel Core i5-7300HQ
146 Points ∼71% -16%
Dell Latitude 5590
Intel Core i5-8250U
145 Points ∼70% -17%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
141 Points ∼68% -19%
CPU Multi 64Bit
Gigabyte Aero 14-K8
Intel Core i7-8750H
1064 Points ∼34% +52%
Eurocom Tornado F5
Intel Core i7-7700K
897 Points ∼29% +28%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
864 Points ∼28% +24%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
735 Points ∼24% +5%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
699 Points ∼22%
Dell Latitude 5590
Intel Core i5-8250U
696 Points ∼22% 0%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
681 Points ∼22% -3%
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
639 Points ∼21% -9%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
530 Points ∼17% -24%
Dell XPS 15 2017 9560 (7300HQ, Full-HD)
Intel Core i5-7300HQ
508 Points ∼16% -27%
Dell Latitude 13 7380
Intel Core i7-7600U
359 Points ∼12% -49%
Cinebench R11.5
CPU Single 64Bit
Eurocom Tornado F5
Intel Core i7-7700K
2.19 Points ∼94% +11%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
1.99 Points ∼85% +1%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
1.97 Points ∼84%
Gigabyte Aero 14-K8
Intel Core i7-8750H
1.96 Points ∼84% -1%
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
1.9 Points ∼81% -4%
Dell Latitude 13 7380
Intel Core i7-7600U
1.86 Points ∼79% -6%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
1.79 Points ∼76% -9%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
1.78 Points ∼76% -10%
Dell Latitude 5590
Intel Core i5-8250U
1.65 Points ∼71% -16%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
1.58 Points ∼68% -20%
CPU Multi 64Bit
Gigabyte Aero 14-K8
Intel Core i7-8750H
12.14 Points ∼45% +59%
Eurocom Tornado F5
Intel Core i7-7700K
9.78 Points ∼36% +28%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
9.41 Points ∼35% +23%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
8.14 Points ∼30% +6%
Dell Latitude 5590
Intel Core i5-8250U
7.76 Points ∼29% +1%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
7.65 Points ∼28%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
7.47 Points ∼28% -2%
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
6.35 Points ∼23% -17%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
5.88 Points ∼22% -23%
Dell Latitude 13 7380
Intel Core i7-7600U
3.92 Points ∼14% -49%
Cinebench R10
Rendering Single 32Bit
Dell Latitude 5590
Intel Core i5-8250U
8356 Points ∼77% +30%
Eurocom Tornado F5
Intel Core i7-7700K
7222 Points ∼67% +12%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
6668 Points ∼62% +4%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
6436 Points ∼59%
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
6345 Points ∼59% -1%
Dell Latitude 13 7380
Intel Core i7-7600U
6283 Points ∼58% -2%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
5844 Points ∼54% -9%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
5825 Points ∼54% -9%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
4515 Points ∼42% -30%
Rendering Multiple CPUs 32Bit
Eurocom Tornado F5
Intel Core i7-7700K
28189 Points ∼57% +18%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
25809 Points ∼52% +8%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
23794 Points ∼48%
Dell Latitude 5590
Intel Core i5-8250U
21891 Points ∼44% -8%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
21845 Points ∼44% -8%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
21671 Points ∼44% -9%
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
20666 Points ∼42% -13%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
13729 Points ∼28% -42%
Dell Latitude 13 7380
Intel Core i7-7600U
12482 Points ∼25% -48%
wPrime 2.0x - 1024m
Dell Latitude 13 7380
Intel Core i7-7600U
445.8 s * ∼5% -126%
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
372.39 s * ∼4% -88%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
268.14 s * ∼3% -36%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
215.823 s * ∼3% -9%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
214.927 s * ∼3% -9%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
197.647 s * ∼2%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
186.66 s * ∼2% +6%
Eurocom Tornado F5
Intel Core i7-7700K
176.329 s * ∼2% +11%
Super Pi Mod 1.5 XS 32M - ---
Dell XPS 13 9370 i7 UHD
Intel Core i7-8550U
740.35 Seconds * ∼3% -47%
Acer Swift 3 SF315-41-R6J9
AMD Ryzen 7 2700U
697.5 Seconds * ∼3% -38%
Dell XPS 15 9575 i5-8305G
Intel Core i5-8305G
564.887 Seconds * ∼3% -12%
Dell Latitude 13 7380
Intel Core i7-7600U
543 Seconds * ∼2% -8%
Dell XPS 15 9560 (i7-7700HQ, UHD)
Intel Core i7-7700HQ
522.024 Seconds * ∼2% -4%
Dell XPS 15 9575 i7-8705G
Intel Core i7-8705G
503.967 Seconds * ∼2%
Intel Hades Canyon NUC8i7HVK
Intel Core i7-8809G
484.864 Seconds * ∼2% +4%
Eurocom Tornado F5
Intel Core i7-7700K
440.036 Seconds * ∼2% +13%

* ... smaller is better

Cinebench R10 Shading 32Bit
10096
Cinebench R10 Rendering Multiple CPUs 32Bit
23794
Cinebench R10 Rendering Single 32Bit
6436
Cinebench R11.5 CPU Multi 64Bit
7.65 Points
Cinebench R11.5 CPU Single 64Bit
1.97 Points
Cinebench R11.5 OpenGL 64Bit
107.41 fps
Cinebench R15 Ref. Match 64Bit
98 %
Cinebench R15 CPU Multi 64Bit
699 Points
Cinebench R15 CPU Single 64Bit
174 Points
Cinebench R15 OpenGL 64Bit
125.49 fps
Help

System Performance

PCMark benchmarks have been scoring all our Kaby Lake-G systems quite highly. Both of our XPS 15 9575 configurations are within single-digit percentages from powerful systems like the Asus Zenbook Pro UX550 and even the latest Gigabyte Aero 15X v8.

We experienced no major hardware or software issues during our time with the unit aside from the color issues above.

PCMark 8 Home Accelerated
PCMark 8 Home Accelerated
PCMark 8 Creative Accelerated
PCMark 8 Creative Accelerated
PCMark 8 Work Accelerated
PCMark 8 Work Accelerated
PCMark 10
PCMark 10
PCMark 10 - Score
Intel Hades Canyon NUC8i7HVK
Vega M GH, 8809G, Intel Optane 120 GB SSDPEK1W120GA
5301 Points ∼68% +6%
Gigabyte Aero 15X v8
GeForce GTX 1070 Max-Q, 8750H, Toshiba NVMe THNSN5512GPU7
5059 Points ∼65% +1%
Dell XPS 15 9575 i7-8705G
Vega M GL / 870, 8705G, SK hynix PC401 NVMe 500 GB
5001 Points ∼64%
Dell XPS 15 9575 i5-8305G
Vega M GL / 870, 8305G, Toshiba XG5 KXG50ZNV256G
4702 Points ∼61% -6%
Asus Zenbook Pro UX550VE-DB71T
GeForce GTX 1050 Ti (Notebook), 7700HQ, Samsung PM961 NVMe MZVLW512HMJP
4552 Points ∼59% -9%
Dell XPS 13 9370 i7 UHD
UHD Graphics 620, 8550U, Toshiba XG5 KXG50ZNV512G
3728 Points ∼48% -25%
Acer Swift 3 SF315-41-R6J9
Vega 10, 2700U, Micron SSD 1100 SED 512GB, M.2 (MTFDDAV512TBN)
3303 Points ∼43% -34%
Dell Latitude 5590
UHD Graphics 620, 8250U, SK hynix SC311 M.2
2469 Points ∼32% -51%
PCMark 8
Work Score Accelerated v2
Gigabyte Aero 15X v8
GeForce GTX 1070 Max-Q, 8750H, Toshiba NVMe THNSN5512GPU7
5676 Points ∼87% +27%
Intel Hades Canyon NUC8i7HVK
Vega M GH, 8809G, Intel Optane 120 GB SSDPEK1W120GA
5454 Points ∼84% +22%
Asus Zenbook Pro UX550VE-DB71T
GeForce GTX 1050 Ti (Notebook), 7700HQ, Samsung PM961 NVMe MZVLW512HMJP
5141 Points ∼79% +15%
Dell XPS 15 9575 i5-8305G
Vega M GL / 870, 8305G, Toshiba XG5 KXG50ZNV256G
5134 Points ∼79% +15%
Dell XPS 15 2017 9560 (7300HQ, Full-HD)
GeForce GTX 1050 (Notebook), 7300HQ, WDC WD10SPCX-75KHST0 + SanDisk Z400s M.2 2242 32 GB Cache
4884 Points ∼75% +9%
Acer Swift 3 SF315-41-R6J9
Vega 10, 2700U, Micron SSD 1100 SED 512GB, M.2 (MTFDDAV512TBN)
4774 Points ∼73% +7%
Dell Latitude 5590
UHD Graphics 620, 8250U, SK hynix SC311 M.2
4670 Points ∼72% +4%
Dell XPS 15 9575 i7-8705G
Vega M GL / 870, 8705G, SK hynix PC401 NVMe 500 GB
4469 Points ∼69%
Dell XPS 15 9560 (i7-7700HQ, UHD)
GeForce GTX 1050 (Notebook), 7700HQ, Lite-on CX2-8B512-Q11 NVMe SSD
4422 Points ∼68% -1%
Dell XPS 13 9370 i7 UHD
UHD Graphics 620, 8550U, Toshiba XG5 KXG50ZNV512G
4125 Points ∼63% -8%
Creative Score Accelerated v2
Intel Hades Canyon NUC8i7HVK
Vega M GH, 8809G, Intel Optane 120 GB SSDPEK1W120GA
6457 Points ∼68% +3%
Dell XPS 15 9575 i5-8305G
Vega M GL / 870, 8305G, Toshiba XG5 KXG50ZNV256G
6303 Points ∼66% 0%
Dell XPS 15 9575 i7-8705G
Vega M GL / 870, 8705G, SK hynix PC401 NVMe 500 GB
6297 Points ∼66%
Asus Zenbook Pro UX550VE-DB71T
GeForce GTX 1050 Ti (Notebook), 7700HQ, Samsung PM961 NVMe MZVLW512HMJP
5328 Points ∼56% -15%
Dell XPS 15 9560 (i7-7700HQ, UHD)
GeForce GTX 1050 (Notebook), 7700HQ, Lite-on CX2-8B512-Q11 NVMe SSD
5114 Points ∼54% -19%
Dell Latitude 5590
UHD Graphics 620, 8250U, SK hynix SC311 M.2
4875 Points ∼51% -23%
Dell XPS 13 9370 i7 UHD
UHD Graphics 620, 8550U, Toshiba XG5 KXG50ZNV512G
4865 Points ∼51% -23%
Acer Swift 3 SF315-41-R6J9
Vega 10, 2700U, Micron SSD 1100 SED 512GB, M.2 (MTFDDAV512TBN)
4014 Points ∼42% -36%
Home Score Accelerated v2
Intel Hades Canyon NUC8i7HVK
Vega M GH, 8809G, Intel Optane 120 GB SSDPEK1W120GA
4833 Points ∼79% +14%
Dell XPS 15 9575 i5-8305G
Vega M GL / 870, 8305G, Toshiba XG5 KXG50ZNV256G
4693 Points ∼77% +11%
Gigabyte Aero 15X v8
GeForce GTX 1070 Max-Q, 8750H, Toshiba NVMe THNSN5512GPU7
4504 Points ∼74% +6%
Dell XPS 15 9575 i7-8705G
Vega M GL / 870, 8705G, SK hynix PC401 NVMe 500 GB
4235 Points ∼70%
Asus Zenbook Pro UX550VE-DB71T
GeForce GTX 1050 Ti (Notebook), 7700HQ, Samsung PM961 NVMe MZVLW512HMJP
4184 Points ∼69% -1%
Dell Latitude 5590
UHD Graphics 620, 8250U, SK hynix SC311 M.2
3757 Points ∼62% -11%
Dell XPS 15 2017 9560 (7300HQ, Full-HD)
GeForce GTX 1050 (Notebook), 7300HQ, WDC WD10SPCX-75KHST0 + SanDisk Z400s M.2 2242 32 GB Cache
3659 Points ∼60% -14%
Acer Swift 3 SF315-41-R6J9
Vega 10, 2700U, Micron SSD 1100 SED 512GB, M.2 (MTFDDAV512TBN)
3640 Points ∼60% -14%
Dell XPS 15 9560 (i7-7700HQ, UHD)
GeForce GTX 1050 (Notebook), 7700HQ, Lite-on CX2-8B512-Q11 NVMe SSD
3588 Points ∼59% -15%
Dell XPS 13 9370 i7 UHD
UHD Graphics 620, 8550U, Toshiba XG5 KXG50ZNV512G
3371 Points ∼55% -20%
PCMark 8 Home Score Accelerated v2
4235 points
PCMark 8 Creative Score Accelerated v2
6297 points
PCMark 8 Work Score Accelerated v2
4469 points
Help

Storage Devices

Our test unit has been specially configured by Dell with a 512 GB SK Hynix PC401 NVMe SSD whereas all current SKUs are limited to 128 GB to 256 GB SSD. Thus, our results here may not represent what users will get when they purchase the XPS 15 9575.

The SK Hynix SSD in our unit returns an excellent sequential read rate of 2302 MB/s and an average write rate of 752 MB/s. In comparison, the popular Samsung PM961 NVMe is able to achieve write rates twice as fast (1475 vs. 752 MB/s) while the Toshiba XG5 SSD in the retail XPS 15 9575 unit can be twice as slow (334 vs. 752 MB/s). We hope to see the SK Hynix SSD in future SKUs of the XPS 15 9575 since it will be an upgrade over the Toshiba in more ways than just storage capacity.

See our table of SSDs and HDDs for more benchmark comparisons. It's worth noting that this very same SK Hynix PC401 SSD can also be found on the Latitude 7390 2-in-1.

CDM 5
CDM 5
AS SSD
AS SSD
PCMark 8 Storage
PCMark 8 Storage
Dell XPS 15 9575 i7-8705G
SK hynix PC401 NVMe 500 GB
Dell XPS 15 9575 i5-8305G
Toshiba XG5 KXG50ZNV256G
Asus ZenBook Flip 15 UX561UD
Micron 1100 MTFDDAV256TBN
Asus Zenbook Pro UX550VE-DB71T
Samsung PM961 NVMe MZVLW512HMJP
Asus G501VW-FY081T
Samsung CM871 MZNLF128HCHP
AS SSD
-58%
-59%
31%
-122%
Copy Game MB/s
944.26
250.54
-73%
282.32
-70%
477.15
-49%
141.54
-85%
Copy Program MB/s
487.91
174.87
-64%
196.79
-60%
294.56
-40%
99.93
-80%
Copy ISO MB/s
1522.88
392.69
-74%
291.03
-81%
1268.54
-17%
162.96
-89%
Score Total
2132
1113
-48%
844
-60%
3721
75%
269
-87%
Score Write
807
307
-62%
371
-54%
1421
76%
63
-92%
Score Read
921
595
-35%
310
-66%
1541
67%
152
-83%
Access Time Write *
0.051
0.056
-10%
0.056
-10%
0.034
33%
0.225
-341%
Access Time Read *
0.044
0.146
-232%
0.097
-120%
0.054
-23%
0.207
-370%
4K-64 Write
637.4
181.22
-72%
248.49
-61%
1160.32
82%
19.4
-97%
4K-64 Read
649.44
337.13
-48%
235.49
-64%
1269.16
95%
87.64
-87%
4K Write
94.25
92.73
-2%
84.85
-10%
112.85
20%
30.66
-67%
4K Read
41.38
24.78
-40%
25.79
-38%
51.03
23%
13.87
-66%
Seq Write
752.11
334.27
-56%
379.28
-50%
1475.4
96%
126.93
-83%
Seq Read
2302.4
2335.19
1%
488.01
-79%
2207.5
-4%
503.89
-78%

* ... smaller is better

SK hynix PC401 NVMe 500 GB
CDM 5/6 Read Seq Q32T1: 2661 MB/s
CDM 5/6 Write Seq Q32T1: 1390 MB/s
CDM 5/6 Read 4K Q32T1: 299.7 MB/s
CDM 5/6 Write 4K Q32T1: 268.8 MB/s
CDM 5 Read Seq: 1873 MB/s
CDM 5 Write Seq: 1255 MB/s
CDM 5/6 Read 4K: 26.1 MB/s
CDM 5/6 Write 4K: 118.1 MB/s

GPU Performance

In Intel systems, the same integrated HD Graphics 620 GPU can be found on a wide range of U-class CPUs from the Core i3-7100U to the Core i7-7600U. Actual GPU performance, however, is still very similar between these systems. The same can be said for the AMD Radeon RX Vega M GL GPU in the Core i5-8305G and Core i7-8705G. 3DMark results show that both of the Dell SKUs are nearly identical in raw graphics performance to the point where any benefits in gaming should be unnoticeable. As our Stress Test section will show, the Vega M GL GPU runs at the same 1011 MHz clock rate between the two i5 and i7 CPUs.

Raw graphics power is between the GTX 1050 and GTX 1050 Ti and comparable to the GTX 965M. Thus, gamers can expect similar performance levels to the XPS 15 9560. Some titles, however, may run much slower on the AMD GPU due to poorer optimization. See our dedicated page on the Radeon RX Vega M GL here for more technical information and benchmarks.

3DMark 11
3DMark 11
Cloud Gate
Cloud Gate
Time Spy
Time Spy
Fire Strike
Fire Strike
Fire Strike Extreme
Fire Strike Extreme
Fire Strike Ultra
Fire Strike Ultra
3DMark
1920x1080 Fire Strike Graphics
Asus FX503VM-EH73
NVIDIA GeForce GTX 1060 (Laptop), 7700HQ
11483 Points ∼28% +56%
Intel Hades Canyon NUC8i7HVK
AMD Radeon RX Vega M GH, 8809G
10248 Points ∼25% +39%
Dell Inspiron 15 7000 7577 4K
NVIDIA GeForce GTX 1060 Max-Q, 7700HQ
10180 Points ∼25% +39%
Alienware 13 R3 (i5-7300HQ, GTX 1050 Ti)
NVIDIA GeForce GTX 1050 Ti (Notebook), 7300HQ
8066 Points ∼20% +10%
Gigabyte Aero 14-K8
NVIDIA GeForce GTX 1050 Ti (Notebook), 8750H
7637 Points ∼19% +4%
Dell XPS 15 9575 i5-8305G
AMD Radeon RX Vega M GL / 870, 8305G
7355 Points ∼18% 0%
Dell XPS 15 9575 i7-8705G
AMD Radeon RX Vega M GL / 870, 8705G
7348 Points ∼18%
Asus Strix GL502VT-DS74
NVIDIA GeForce GTX 970M, 6700HQ
7321 Points ∼18% 0%
Dell XPS 15 9560 (i7-7700HQ, UHD)
NVIDIA GeForce GTX 1050 (Notebook), 7700HQ
6074 Points ∼15% -17%
Asus G501VW-FY081T
NVIDIA GeForce GTX 960M, 6700HQ
4348 Points ∼11% -41%
Lenovo ThinkPad E580-20KS001RGE
AMD Radeon RX 550 (Laptop), 8550U
2874 Points ∼7% -61%
1280x720 Cloud Gate Standard Graphics
Asus FX503VM-EH73
NVIDIA GeForce GTX 1060 (Laptop), 7700HQ
80542 Points ∼44% +90%
Dell Inspiron 15 7000 7577 4K
NVIDIA GeForce GTX 1060 Max-Q, 7700HQ
69279 Points ∼38% +64%
Intel Hades Canyon NUC8i7HVK
AMD Radeon RX Vega M GH, 8809G
59162 Points ∼32% +40%
Alienware 13 R3 (i5-7300HQ, GTX 1050 Ti)
NVIDIA GeForce GTX 1050 Ti (Notebook), 7300HQ
51416 Points ∼28% +21%
Gigabyte Aero 14-K8
NVIDIA GeForce GTX 1050 Ti (Notebook), 8750H
50520 Points ∼27% +19%
Asus Strix GL502VT-DS74
NVIDIA GeForce GTX 970M, 6700HQ
50205 Points ∼27% +19%
Dell XPS 15 9575 i5-8305G
AMD Radeon RX Vega M GL / 870, 8305G
44796 Points ∼24% +6%
Dell XPS 15 9575 i7-8705G
AMD Radeon RX Vega M GL / 870, 8705G
42351 Points ∼23%
Dell XPS 15 9560 (i7-7700HQ, UHD)
NVIDIA GeForce GTX 1050 (Notebook), 7700HQ
31274 Points ∼17% -26%
Asus G501VW-FY081T
NVIDIA GeForce GTX 960M, 6700HQ
30621 Points ∼17% -28%
Lenovo ThinkPad E580-20KS001RGE
AMD Radeon RX 550 (Laptop), 8550U
17423 Points ∼9% -59%
3DMark 11
1280x720 Performance Combined
Intel Hades Canyon NUC8i7HVK
AMD Radeon RX Vega M GH, 8809G
10391 Points ∼59% +20%
Dell Inspiron 15 7000 7577 4K
NVIDIA GeForce GTX 1060 Max-Q, 7700HQ
9019 Points ∼51% +4%
Gigabyte Aero 14-K8
NVIDIA GeForce GTX 1050 Ti (Notebook), 8750H
8850 Points ∼50% +3%
Dell XPS 15 9575 i7-8705G
AMD Radeon RX Vega M GL / 870, 8705G
8633 Points ∼49%
Asus Strix GL502VT-DS74
NVIDIA GeForce GTX 970M, 6700HQ
7952 Points ∼45% -8%
Dell XPS 15 9575 i5-8305G
AMD Radeon RX Vega M GL / 870, 8305G
7788 Points ∼44% -10%
Asus FX503VM-EH73
NVIDIA GeForce GTX 1060 (Laptop), 7700HQ
7696 Points ∼44% -11%
Alienware 13 R3 (i5-7300HQ, GTX 1050 Ti)
NVIDIA GeForce GTX 1050 Ti (Notebook), 7300HQ
6374 Points ∼36% -26%
Asus G501VW-FY081T
NVIDIA GeForce GTX 960M, 6700HQ
5390 Points ∼31% -38%
Lenovo ThinkPad E580-20KS001RGE
AMD Radeon RX 550 (Laptop), 8550U
4154 Points ∼24% -52%
1280x720 Performance GPU
Asus FX503VM-EH73
NVIDIA GeForce GTX 1060 (Laptop), 7700HQ
14550 Points ∼29% +44%
Intel Hades Canyon NUC8i7HVK
AMD Radeon RX Vega M GH, 8809G
14302 Points ∼28% +41%
Dell Inspiron 15 7000 7577 4K
NVIDIA GeForce GTX 1060 Max-Q, 7700HQ
13180 Points ∼26% +30%
Alienware 13 R3 (i5-7300HQ, GTX 1050 Ti)
NVIDIA GeForce GTX 1050 Ti (Notebook), 7300HQ
10325 Points ∼20% +2%
Dell XPS 15 9575 i7-8705G
AMD Radeon RX Vega M GL / 870, 8705G
10118 Points ∼20%
Dell XPS 15 9575 i5-8305G
AMD Radeon RX Vega M GL / 870, 8305G
9862 Points ∼19% -3%
Asus Strix GL502VT-DS74
NVIDIA GeForce GTX 970M, 6700HQ
9824 Points ∼19% -3%
Gigabyte Aero 14-K8
NVIDIA GeForce GTX 1050 Ti (Notebook), 8750H
9181 Points ∼18% -9%
Asus G501VW-FY081T
NVIDIA GeForce GTX 960M, 6700HQ
5440 Points ∼11% -46%
Lenovo ThinkPad E580-20KS001RGE
AMD Radeon RX 550 (Laptop), 8550U
4444 Points ∼9% -56%
3DMark 11 Performance
9890 points
3DMark Ice Storm Standard Score
67107 points
3DMark Cloud Gate Standard Score
20851 points
3DMark Fire Strike Score
6280 points
3DMark Fire Strike Extreme Score
3100 points
3DMark Time Spy Score
2225 points
Help
low med. high ultra4K
BioShock Infinite (2013) 224.5181.416152.5fps
Batman: Arkham Knight (2015) 108955416fps
Rise of the Tomb Raider (2016) 133.181.242.432.814.3fps
Ashes of the Singularity (2016) 54.93732.7fps

Stress Test

We stress the laptop to identify for any potential throttling or stability issues. When running Prime95 to stress the CPU, clock speeds can be observed running at 3.7 GHz for the first 20 seconds or so before dropping and stabilizing in the 3.1 to 3.5 GHz range. The higher initial clock speeds mirror our CineBench loop test from above where the high initial score of 746 points can only be attainable on a cold run. When compared to the XPS 15 9575 Core i5-8305G SKU, the Core i7-8705G runs warmer and at higher clock rates when at 100 percent capacity. Running Prime95 and FurMark simultaneously to stress the system will throttle both the CPU and GPU in order to maintain a stable core temperature of 64 C.

Running Witcher 3 is more representative of the types of loads gamers will experience. The CPU and GPU can be observed operating at stable 3.8 GHz and 1011 MHz clock rates, respectively, compared to 3.4 GHz and 1011 MHz on the i5-8305G in the less expensive XPS 15 9575 SKU. Core temperature is slightly cooler as well likely due in part to differences in ambient temperature. Despite the oddity, core temperatures are still significantly cooler than the GTX 1050 GPU in the ZenBook Flip 15 and just a few degrees warmer than the GTX 1050 in the thicker 17.3-inch Asus ROG Strix GL703VD.

Running on battery power will throttle GPU performance while CPU performance does not change. A 3DMark 11 run on batteries returns Physics and Graphics scores of 9762 and 5660 points, respectively, compared to 9742 and 10118 points when on mains.

Prime95 stress
Prime95 stress
FurMark stress
FurMark stress
Prime95+FurMark stress
Prime95+FurMark stress
Witcher 3 stress
Witcher 3 stress
CPU Clock (GHz) GPU Clock (MHz) Average CPU Temperature (°C)
Prime95 Stress 3.1 - 3.5 -- 75 - 83
FurMark Stress -- 535 - 1011 60
Prime95 + FurMark Stress 1.8 535 - 830 64
Witcher 3 Stress 3.8 1011 65

Emissions

System Noise

Fan behavior is identical to the slower i5-8305G SKU. We can notice no coil whine or electronic noise on our unit. The fans are still loud when gaming but nowhere near as loud as on the XPS 15 9560.

Noise Level

Idle
28.2 / 28.2 / 28.2 dB(A)
Load
29 / 47.4 dB(A)
  red to green bar
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
 
min: dark, med: mid, max: light   Audix TM1, Arta (15 cm distance)   environment noise: 28.2 dB(A)
Dell XPS 15 9575 i7-8705G
Vega M GL / 870, 8705G, SK hynix PC401 NVMe 500 GB
Lenovo Yoga 720-15IKB-80X7
GeForce GTX 1050 (Notebook), 7700HQ, Samsung PM961 MZVLW256HEHP
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 (Notebook), 8550U, Micron 1100 MTFDDAV256TBN
Asus Zenbook Pro UX550VE-DB71T
GeForce GTX 1050 Ti (Notebook), 7700HQ, Samsung PM961 NVMe MZVLW512HMJP
Alienware 13 R3 (i5-7300HQ, GTX 1050 Ti)
GeForce GTX 1050 Ti (Notebook), 7300HQ, Samsung PM961 MZVLW256HEHP
Noise
-5%
-8%
-11%
-3%
off / environment *
28.2
28.2
-0%
30.4
-8%
28.3
-0%
29.7
-5%
Idle Minimum *
28.2
28.2
-0%
31.3
-11%
30.4
-8%
29.7
-5%
Idle Average *
28.2
28.2
-0%
31.3
-11%
31
-10%
29.7
-5%
Idle Maximum *
28.2
28.2
-0%
31.3
-11%
31.2
-11%
29.7
-5%
Load Average *
29
39
-34%
36.4
-26%
43.3
-49%
32.7
-13%
Witcher 3 ultra *
44.7
46.2
-3%
36.4
19%
Load Maximum *
47.4
46.3
2%
37.1
22%
46.2
3%
50
-5%

* ... smaller is better

Temperature

Witcher 3 stress
Witcher 3 stress

Once again, the new GORE insulators really work to keep surface temperatures at more comfortable levels. The bottom panel maintains a temperature cooler than 40 C at its warmest spot when gaming compared to 43 C and 50 C on the thicker XPS 15 9560 and Yoga 720-15IKB convertibles, respectively. 

Unfortunately, the XPS 9575 series no longer has the symmetrical temperature gradient as experienced on the XPS 15 9560 because of the redesigned motherboard. The positioning of the Kaby Lake-G processor means that the left side of the notebook will always be warmer than the right and this delta will only increase when under higher loads. For example, the important WASD keys can be as warm as 45 C when gaming compared to just 35 C on the XPS 15. Even though the XPS 15 9575 is slightly more powerful than its XPS 15 sibling, gamers may not appreciate the warmer keys.

System idle (top)
System idle (top)
System idle (bottom)
System idle (bottom)
Witcher 3 stress (top)
Witcher 3 stress (top)
Witcher 3 stress (bottom)
Witcher 3 stress (bottom)
Witcher 3 stress (XPS 15 9560 for comparison)
Witcher 3 stress (XPS 15 9560 for comparison)
Witcher 3 stress (XPS 15 9560 for comparison)
Witcher 3 stress (XPS 15 9560 for comparison)
Max. Load
 45 °C
113 F
41.2 °C
106 F
25.2 °C
77 F
 
 42.4 °C
108 F
39.6 °C
103 F
22.6 °C
73 F
 
 25.6 °C
78 F
22.2 °C
72 F
20.6 °C
69 F
 
Maximum: 45 °C = 113 F
Average: 31.6 °C = 89 F
26.6 °C
80 F
32.4 °C
90 F
36.6 °C
98 F
25 °C
77 F
30.6 °C
87 F
35 °C
95 F
23.4 °C
74 F
27.2 °C
81 F
30.6 °C
87 F
Maximum: 36.6 °C = 98 F
Average: 29.7 °C = 85 F
Power Supply (max.)  44 °C = 111 F | Room Temperature 20 °C = 68 F | Fluke 62 Mini IR Thermometer

Energy Management

Power Consumption

Our first XPS 15 9575 review unit shipped with a faulty AC adapter and we were unable to provide our usual power consumption measurements as a result. Fortunately, our second XPS unit includes an operable AC adapter. It's worth noting that the adapter is rated for 130 W even though the industry specification for USB Type-C charging is limited to 100 W.

Idling on desktop will draw between 6 W and 14 W depending on the screen brightness and Power Profile settings. The results are very similar to the Asus ZenBook Flip 15 while also being significantly more power efficient than the XPS 15 9560 across the board. Gaming loads will demand about 85 W compared to 105 W on the XPS 15 9560 (w/ GTX 1050) even though raw GPU power is 20 percent faster on the XPS 15 9575. In short, the XPS convertible is both faster and more efficient than what the XPS 15 9560 series can offer. Notebooks with the GTX 1050 Ti may consume more power when gaming, but the overall differences in performance-per-Watt between these systems are more marginal than we were expecting.

What about the 130 W power delivery? Dell says it designed the USB Type-C connector in the XPS 15 2-in-1 to be uncapped for up to 130 W. To test this, we stressed the notebook to 100 percent activity with Prime95 and FurMark running simultaneously. Our graph below shows that power consumption spikes to almost 140 W in the first couple of seconds before quickly dropping to stabilize at around 88 W. Thus, while the system can indeed draw over 100 W, it is unsustainable. This thankfully has no impact on the actual performance of the system as 100 W appears to be more than sufficient in practice. The extra 30 W from the adapter is likely overhead to ensure stability.

Relatively small (~14.3 x 6.5 x 2.3 cm) adapter can also be used to charge other compatible USB Type-C devices
Relatively small (~14.3 x 6.5 x 2.3 cm) adapter can also be used to charge other compatible USB Type-C devices
The 130 W power delivery is greater than the 100 W standard of Thunderbolt 3
The 130 W power delivery is greater than the 100 W standard of Thunderbolt 3
Furmark activated at 20s mark
Furmark activated at 20s mark
Prime95 activated at 20s mark. Consumption is relatively steady with only small fluctuations that dip over time
Prime95 activated at 20s mark. Consumption is relatively steady with only small fluctuations that dip over time
Prime95+FurMark activated at 20s mark. Note the initial spike in consumption to almost 140 W before quickly dropping and leveling off
Prime95+FurMark activated at 20s mark. Note the initial spike in consumption to almost 140 W before quickly dropping and leveling off
Constant power consumption whilst running Witcher 3
Constant power consumption whilst running Witcher 3
Power Consumption
Off / Standbydarklight 0.58 / 0.92 Watt
Idledarkmidlight 6.2 / 12.9 / 13.6 Watt
Load midlight 76.1 / 99.4 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Dell XPS 15 9575 i7-8705G
8705G, Vega M GL / 870, SK hynix PC401 NVMe 500 GB, IPS, 3840x2160, 15.6
Dell XPS 15 9560 (i7-7700HQ, UHD)
7700HQ, GeForce GTX 1050 (Notebook), Lite-on CX2-8B512-Q11 NVMe SSD, IGZO IPS, 3840x2160, 15.6
Lenovo Yoga 720-15IKB-80X7
7700HQ, GeForce GTX 1050 (Notebook), Samsung PM961 MZVLW256HEHP, IPS, 1920x1080, 15.6
Asus ZenBook Flip 15 UX561UD
8550U, GeForce GTX 1050 (Notebook), Micron 1100 MTFDDAV256TBN, IPS, 3840x2160, 15.6
Asus Zenbook Pro UX550VE-DB71T
7700HQ, GeForce GTX 1050 Ti (Notebook), Samsung PM961 NVMe MZVLW512HMJP, IPS, 1920x1080, 15.6
Power Consumption
-37%
-2%
-3%
8%
Idle Minimum *
6.2
11.9
-92%
8.3
-34%
5.4
13%
6.3
-2%
Idle Average *
12.9
17.1
-33%
10.2
21%
10.8
16%
7.9
39%
Idle Maximum *
13.6
17.3
-27%
10.4
24%
13.9
-2%
8.1
40%
Load Average *
76.1
94.7
-24%
67.5
11%
94
-24%
84.9
-12%
Load Maximum *
99.4
122
-23%
117.2
-18%
116.6
-17%
102.4
-3%
Witcher 3 ultra *
84.3
104.8
-24%
96.5
-14%
96.3
-14%

* ... smaller is better

Battery Life

Users can expect around 7 hours of real-world WLAN use before needing to recharge. Competing notebooks with the i7-7700HQ and GTX 1050 return similar all-day results. Unlike the XPS 15 9560, there is only one battery option across all current XPS 9575 SKUs.

Charging from near empty to full capacity will take about 2 to 2.5 hours with the included AC adapter. It's a bit slower than expected since 1.5 to 2 hours is more typical of Ultrabooks and multimedia notebooks.

Battery Runtime
Idle (without WLAN, min brightness)
11h 13min
NBC WiFi Websurfing Battery Test 1.3
7h 00min
Load (maximum brightness)
1h 03min
Dell XPS 15 9575 i7-8705G
8705G, Vega M GL / 870, 75 Wh
Dell XPS 15 9575 i5-8305G
8305G, Vega M GL / 870, 75 Wh
Lenovo Yoga 720-15IKB-80X7
7700HQ, GeForce GTX 1050 (Notebook), 72 Wh
Asus ZenBook Flip 15 UX561UD
8550U, GeForce GTX 1050 (Notebook), 52 Wh
Asus Zenbook Pro UX550VE-DB71T
7700HQ, GeForce GTX 1050 Ti (Notebook), 73 Wh
Asus Strix GL502VT-DS74
6700HQ, GeForce GTX 970M, 64 Wh
Battery Runtime
19%
42%
-3%
30%
-13%
Reader / Idle
673
663
-1%
1066
58%
558
-17%
1023
52%
584
-13%
WiFi v1.3
420
564
34%
484
15%
311
-26%
532
27%
356
-15%
Load
63
78
24%
96
52%
84
33%
70
11%
56
-11%

Pros

+ more power efficient than the XPS 15 9560 and many competing alternatives
+ active stylus and USB Type-C to Type-A adapter included at no extra charge
+ comparable to Core i7-7700HQ and GTX 1050 in raw power
+ cooler average surface temperature on bottom plate
+ quieter than the XPS 15 9560 when under load
+ cooler core temperatures when under load
+ high contrast and display brightness
+ strong build quality; rigid
+ respectable battery life
+ versatile form factor
+ accessible internals

Cons

- no integrated USB Type-A, HDMI, RJ-45, SIM, NFC, mDP, or full-size card reader
- Core i7-8705G offers very little performance benefits over the Core i7-8305G
- smaller-than-expected gamut; strange color behavior on the 4K UHD panel
- moderately slow black-white response times; more ghosting when gaming
- CPU is unable to maintain maximum Turbo Boost for extended periods
- integrated trackpad keys are soft and with poor feedback
- RAM is not expandable; only one internal storage slot
- pulse-width modulation at low brightness levels
- WASD keys will be very warm when gaming
- backlight brightness could be more uniform
- suboptimal webcam placement
- small Directional keys
- no NumPad

Verdict

In review:  Dell XPS 15 9575 Core i7-8705G. Test model provided by Dell US
In review: Dell XPS 15 9575 Core i7-8705G. Test model provided by Dell US

Current SKUs of the XPS 15 9560 include the Core i5-7300HQ and Core i7-7700HQ similar to how the current selection of XPS 15 9575 SKUs include the Core i5-8305G and Core i7-8705G. Whereas the jump from an i5-7300HQ to i7-7700HQ can bring a 40 percent boost in performance, the jump from an i5-8305G to i7-8705G is just 5 to 10 percent. When you factor in the massive cost difference between the i5 and i7 SKUs of the XPS 15 9575 ($1300 USD vs. $2200 USD), it becomes clear that users shouldn't purchase the Core i7 configuration if performance-per-Dollar is priority.

Instead, Dell is justifying the wide price delta with the higher RAM and higher resolution panel that only come with the Core i7 SKU as of this writing. Heavy multi-taskers, touchscreen stylus users, and video editors will find more value from the 16 GB RAM and 4K UHD option than most home users. Nonetheless, it's a bit disappointing that current Core i5 SKUs are limited to just 8 GB of RAM.

Aside from the above differences, our existing comments of the Core i5 XPS 15 9575 still apply here. Kaby Lake-G is proving itself to be an excellent alternative to the ubiquitous Core i7-7700HQ and GTX 1050 or 1050 Ti commonly found on competing notebooks. The Dell convertible is even more power efficient and cooler than the mentioned systems and quieter than the XPS 15 9560. So long as users are aware of its laundry list of drawbacks (see right), competing 15-inch convertibles don't come close to what the XPS 15 9575 can offer with the notable exception of the upcoming 2018 HP Spectre x360 15.

You don't need to spend $2200 USD on the Core i7-8705G option when the Core i5-8705G is only slightly slower for almost $1000 USD less. Even the cheapest configuration of the XPS 15 9575 is nearly as fast as the priciest XPS 15 9575 or XPS 9560. We hope to see more RAM and display options for future Core i5 SKUs to make the series even more appealing.

Dell XPS 15 9575 i7-8705G - 05/08/2018 v6
Allen Ngo

Chassis
95 / 98 → 97%
Keyboard
85%
Pointing Device
86%
Connectivity
47 / 81 → 58%
Weight
63 / 20-67 → 91%
Battery
89%
Display
86%
Games Performance
90 / 85 → 100%
Application Performance
94 / 92 → 100%
Temperature
90%
Noise
91 / 95 → 96%
Audio
50%
Camera
55 / 85 → 65%
Average
78%
87%
Multimedia - Weighted Average

Pricecompare

Read all 4 comments / answer
static version load dynamic
Loading Comments
Comment this article
Please share our article, every link counts!
> Notebook / Laptop Reviews and News > Reviews > Dell XPS 15 9575 (i7-8705G, Vega M GL, 4K UHD) Convertible Review
Allen Ngo, 2018-05- 8 (Update: 2018-05- 8)
Allen Ngo
Allen Ngo - US Editor in Chief
After graduating with a B.S. in environmental hydrodynamics from the University of California, I studied reactor physics to become licensed by the U.S. NRC to operate nuclear reactors. There's a striking level of appreciation you gain for everyday consumer electronics after working with modern nuclear reactivity systems astonishingly powered by computers from the 80s. When I'm not managing day-to-day activities and US review articles on Notebookcheck, you can catch me following the eSports scene and the latest gaming news.