Notebookcheck

Asus G751JY G-Sync Notebook Review

Florian Glaser (translated by Liala Stieglitz), 07/07/2015

Synchronization complete. Nvidia's G-Sync technology promises a smooth gaming experience without annoying screen tearing. We could examine this feature for the first time in Asus' G751JY. Has the venerable V-Sync completed its service?

For the original German review, see here.

Although some buyers have reported issues (e.g. speaker bugs), Asus' G751 made a superb impression in December 2014. The 17-inch gaming scion took first place among premium-range laptops with a rating of 89%. MSI's GT72, Schenker's XMG U705, Alienware's 15 and Schenker's U505 occupied the second to fifth places - all with a rating of 88% and a GeForce GTX 970M or GTX 980M.

Not much has changed about Asus' G750JY compared with the last review. The G-Sync model provided to us by Nvidia again has 24 GB of RAM, as well as a 256 GB SSD and 1000 GB HDD combination. The same graphics card is also installed. The aforementioned GeForce GTX 980M currently represents the gold standard in the laptop sector. A matte IPS screen with 1920x1080 pixels is also part of the bundle.

Differences are only found in the processor. Asus has replaced the Core i7-4710HQ clocked with 2.5 - 3.5 GHz with the 100 MHz swifter Core i7-4720HQ. The G751JY will likely be a bit more expensive than the former model, which was priced at just below 2000 Euros (~$2192) at the time. We did not discover anything in online shops at test time.

Asus G751JY (G751 Series)
Processor
Graphics adapter
NVIDIA GeForce GTX 980M - 4096 MB, Core: 1038 MHz, Memory: 2500 MHz, GDDR5, G-Sync, ForceWare 348.01
Memory
24576 MB 
, 3x 8 GB SO-DIMM DDR3-RAM PC3-12800 (1600 MHz), 3 of 4 slots filled, max. 32 GB
Display
17.3 inch 16:9, 1920x1080 pixel, LG Philips LP173WF4-SPD1 (LGD046C), IPS, Full HD, glossy: no
Mainboard
Intel HM87 (Lynx Point)
Storage
Samsung SSD XP941 MZHPU256HCGL, 256 GB 
, PCIe-x4-SSD + HGST Travelstar 7K1000 HTS721010A9E630, 1000 GB HDD @ 7200 rpm
Soundcard
Realtek ALC668 @ Intel Lynx Point PCH - High Definition Audio Controller
Connections
4 USB 3.0 / 3.1 Gen1, 1 Thunderbolt, 1 VGA, 1 HDMI, 1 Infrared, 1 Kensington Lock, Audio Connections: headphone, microphone, S/PDIF, Card Reader: SD,MMC
Networking
Realtek PCIe GBE Family Controller (10/100/1000MBit), Intel Dual Band Wireless-AC 7260 (a/b/g/n/ac), Bluetooth 4.0
Optical drive
Matshita BD-MLT UJ272
Size
height x width x depth (in mm): 53 x 416 x 318 ( = 2.09 x 16.38 x 12.52 in)
Battery
88 Wh Lithium-Ion, 6000 mAh, 8 cells
Operating System
Microsoft Windows 8.1 64 Bit
Camera
Webcam: HD
Additional features
Speakers: 2.1, Keyboard: chiclet, Keyboard Light: yes, PSU: 230 watts, polishing cloth, manual, warranty card, safety information, cable ties, XSplit Gamecaster Trial, McAfee Security trial, Foxit PhantomPDF, PixelMaster Video HDR, Skype, Steam, MS Office 365 trial, various proprietary tools, 24 Months Warranty
Weight
4.18 kg ( = 147.45 oz / 9.22 pounds), Power Supply: 780 g ( = 27.51 oz / 1.72 pounds)

 

We will omit the chapters about case, connectivity, input devices, and speakers since the G751JY has not been modified from the outside - apart from a few new stickers. The corresponding information can be found here. All photos used in this article are from the former review sample.

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Display

The screen is also the same. Asus again uses the 17.3-inch LP173WF4-SPD1 model from LG Philips, which is also found in Asus' GL771JW, among others. Thanks to its lush brightness of almost 320 cd/m², the screen is sufficiently bright even in less favorable surroundings (outdoor use).

316
cd/m²
326
cd/m²
334
cd/m²
316
cd/m²
329
cd/m²
327
cd/m²
315
cd/m²
312
cd/m²
308
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 334 cd/m² Average: 320.3 cd/m²
Brightness Distribution: 92 %
Center on Battery: 329 cd/m²
Contrast: 968:1 (Black: 0.34 cd/m²)
ΔE Color 4.13 | - Ø
ΔE Greyscale 3.72 | - Ø
83% sRGB (Argyll) 55% AdobeRGB 1998 (Argyll)
Gamma: 2.36

The black level can also compete with its contenders. Although 0.34 cd/m² is not record-breaking, this level is good in the IPS sector. The same is true for the contrast: With 968:1, the image is more differentiated and vivid than those of most rivals.

Asus G751JY
LG Philips LP173WF4-SPD1 (LGD046C)
Gigabyte P37X
LG Philips LP173WF4-SPF1, ID: LGD0469
Alienware 17 R2
LG Philips LGD0459 / 173WF4 (Dell P/N: CV69H)
MSI GT72-2QE16SR21BW
LP173WF4-SPF1 (LGD0469)
Schenker XMG U705
LG Philips LP173WF4-SPD1 (LGD046C)
Screen
-10%
-0%
-18%
-3%
Brightness
320
347
8%
307
-4%
278
-13%
317
-1%
Brightness Distribution
92
91
-1%
84
-9%
87
-5%
86
-7%
Black Level *
0.34
0.734
-116%
0.3
12%
0.45
-32%
0.3
12%
Contrast
968
493
-49%
1103
14%
633
-35%
1110
15%
Colorchecker DeltaE2000 *
4.13
2.81
32%
4.88
-18%
5.1
-23%
5.24
-27%
Greyscale DeltaE2000 *
3.72
1.92
48%
3.63
2%
5.23
-41%
4.33
-16%
Gamma
2.36 102%
2.21 109%
2.17 111%
2.32 103%
2.14 112%
CCT
6352 102%
6384 102%
6325 103%
7565 86%
6437 101%
Color Space (Percent of AdobeRGB 1998)
55
57.95
5%
55
0%
57
4%
55
0%
Color Space (Percent of sRGB)
83
84.2
1%
87
5%
83.3
0%

* ... smaller is better

The color reproduction also has to be praised. The screen did a very decent job in our CalMAN tests. No matter whether it was grayscale levels, RGB balance, gamma rate or degree of saturation. Asus' G751JY is exempt from the typical bluish tint of many laptops. The main reason, beside the IPS technology, is the preloaded color profile. The CalMAN scores of the LP173WF4-SPD1 in Schenker's XMG U705 were a bit worse.

CalMAN: Grayscale
CalMAN: Grayscale
CalMAN: Grayscale (calibrated)
CalMAN: Grayscale (calibrated)
CalMAN: Saturation Sweeps
CalMAN: Saturation Sweeps
CalMAN: Saturation Sweeps (calibrated)
CalMAN: Saturation Sweeps (calibrated)
CalMAN: ColorChecker
CalMAN: ColorChecker
CalMAN: ColorChecker (calibrated)
CalMAN: ColorChecker (calibrated)
Asus G751JY vs. sRGB
Asus G751JY vs. sRGB
Asus G751JY vs. AdobeRGB
Asus G751JY vs. AdobeRGB

The color-space coverage is not quite as good. 83% of sRGB and 55% of AdobeRGB are only middling. However, this minor shortcoming will not affect gamers much. Only professional users will want more here. Note: A very similar sounding LG screen exists under the name LP173WF4-SPF1, which cannot quite match the black level and contrast of the SPD1 (for example in MSI's G572 or Gigabyte's P37X). The image quality makes a good to very good impression. We did not discover screen bleeding in our case.

Outdoors
Outdoors
Viewing angles
Viewing angles

G-Sync

G-Sync
G-Sync

The review sample's biggest highlight is the so-called G-Sync technology. In contrast to certified desktop monitors, G-Sync laptops do not have an additional module. Like its main competitor AMD and its FreeSync technology, Nvidia also uses the open adaptive sync standard that functions via an embedded DisplayPort (eDP).

The screen's refresh rate is adapted dynamically to the GPU frame rate to prevent screen tearing. This system caused a few problems at its beginnings because the screen started to flicker below 30 Hz or even inclined to dropout completely. We can give a green light: We did not ascertain flickering or the like in the tests with Batman: Arkham KnightDirt Rally and The Witcher 3.

Unlike V-Sync, G-Sync is not to have a negative impact on performance (stutters, input latency, etc.). To what extent G-Sync is noticed depends on the game and the GPU's power. Our experience shows that the advantage is usually kept within limits. Yes, the image appears somewhat quieter and smoother with (disabled) V-Sync in rapid camera panning sequences or tracking shots. However, these improvements are not world-shattering, especially since G-Sync limits the frame rate to 75. The video below provides a small impression.

Potential buyers will have to decide whether G-Sync is worth the surcharge. In view of the costs, it might make more sense to buy a device with a stronger GPU (e.g. GTX 980M without G-Sync vs. GTX 970M with G-Sync). Because we only recorded the benchmark scores that were barely or not at all affected by the 75 fps limit, there are no disadvantages for the G751JY in regards to ranking. However, we do not see a reason for upgrading the score, either.

Please leave remarks about your impressions of G-Sync and opinions whether or not the technology should be in any way acknowledged in the comments. In addition to Asus, Clevo (P770ZM-G/P750ZM-G), MSI (GT72) and Aorus (X5/X7 Pro) are planning laptops with G-Sync. The latter needs a GeForce GTX 965M Maxwell card at minimum. Optimus graphics switching is not possible on G-Sync devices.

Performance

Undoubtedly, Asus' G751JY comes out as a downright high-end product in every respect. 24 GB of RAM (maximum 32 GB) is just as lush as a 1.25 TB storage device capacity (SSD + HDD). A quad-core processor and high-performance laptop GPU rounds off the bundle.

Processor

The Core i7-4720HQ is an extremely successful quad-core chip from Intel's Haswell generation that is built in the 22 nm process. Although CPUs based on the 14 nm process already exist (for example the Core i7-5700HQ in MSI's GT72), the Core i7-4720HQ is speedy enough for gamers - including for future releases.

Single-core rendering
Single-core rendering
Multi-core rendering
Multi-core rendering
CPU & GPU load
CPU & GPU load

Like most of its quad-core siblings, the 47-watt model has a 6 MB L3 cache. Asus' G751JY fully utilizes its Turbo Boost feature. We ascertained between 3.4 and 3.6 GHz in Cinebench R11.5, which corresponds to Intel's specifications.

Cinebench R11.5 CPU Single 64Bit
1.57 Points
Cinebench R11.5 CPU Multi 64Bit
7.33 Points
Cinebench R11.5 OpenGL 64Bit
64.7 fps
Cinebench R15 CPU Single 64Bit
141 Points
Cinebench R15 CPU Multi 64Bit
673 Points
Cinebench R15 OpenGL 64Bit
106.43 fps
Help

Thanks to the full overclocking, the G751JY scores better than some other 4720HQ laptops in the CPU tests. Gigabyte's P37X lags behind by 2-6% depending on the benchmark. Stronger processors, such as the Core i7-4980HQ or Core i7-5700HQ, are not really worthwhile from a gamer's point of view. First the desktop CPU in Schenker's XMG U705 sprints past the Core i7-4720HQ by 10%.

Cinebench R15
CPU Single 64Bit (sort by value)
Asus G751JY
Intel Core i7-4720HQ
141 Points ∼63%
Gigabyte P37X
Intel Core i7-4720HQ
133 Points ∼60% -6%
Alienware 17 R2
Intel Core i7-4980HQ
155 Points ∼70% +10%
MSI GT72-2QE16SR21BW
Intel Core i7-5700HQ
145 Points ∼65% +3%
Schenker XMG U705
Intel Core i7-4790
159 Points ∼71% +13%
CPU Multi 64Bit (sort by value)
Asus G751JY
Intel Core i7-4720HQ
673 Points ∼36%
Gigabyte P37X
Intel Core i7-4720HQ
662 Points ∼36% -2%
Alienware 17 R2
Intel Core i7-4980HQ
670 Points ∼36% 0%
MSI GT72-2QE16SR21BW
Intel Core i7-5700HQ
723 Points ∼39% +7%
Schenker XMG U705
Intel Core i7-4790
765 Points ∼41% +14%
Cinebench R11.5
CPU Single 64Bit (sort by value)
Asus G751JY
Intel Core i7-4720HQ
1.57 Points ∼71%
Gigabyte P37X
Intel Core i7-4720HQ
1.52 Points ∼69% -3%
Alienware 17 R2
Intel Core i7-4980HQ
1.74 Points ∼79% +11%
MSI GT72-2QE16SR21BW
Intel Core i7-5700HQ
1.62 Points ∼74% +3%
Schenker XMG U705
Intel Core i7-4790
1.79 Points ∼81% +14%
CPU Multi 64Bit (sort by value)
Asus G751JY
Intel Core i7-4720HQ
7.33 Points ∼37%
Gigabyte P37X
Intel Core i7-4720HQ
7.2 Points ∼36% -2%
Alienware 17 R2
Intel Core i7-4980HQ
7.28 Points ∼36% -1%
MSI GT72-2QE16SR21BW
Intel Core i7-5700HQ
7.97 Points ∼40% +9%
Schenker XMG U705
Intel Core i7-4790
8.32 Points ∼42% +14%

System Performance

The system performance is also beyond reproach. With 6073 points, Asus' G751JY settles between Schenker's XMG P505 (6054 points @i7-4710HQ, GTX 980M, 256 GB SSD) and Aorus' X3 Plus v3 (6078 points @i7-4710HQ, GTX 970M, dual SSD) in PCMark 7. We rarely ascertain higher scores.

PCMark 7 Score
6073 points
Help
PCMark 7 - Score (sort by value)
Asus G751JY
GeForce GTX 980M, 4720HQ, Samsung SSD XP941 MZHPU256HCGL
6073 Points ∼75%
Gigabyte P37X
GeForce GTX 980M, 4720HQ, 2x Lite-On LMT-128L9M (RAID 0)
6302 Points ∼78% +4%
Alienware 17 R2
GeForce GTX 980M, 4980HQ, Lite-On IT L8T-256L9G
6622 Points ∼82% +9%
MSI GT72-2QE16SR21BW
GeForce GTX 980M, 5700HQ, 2x Toshiba HG6 THNSNJ128G8NU (RAID 0)
5796 Points ∼72% -5%
Schenker XMG U705
GeForce GTX 970M, 4790, Samsung SM951 MZHPV256HDGL m.2 PCI-e
6847 Points ∼85% +13%

Storage Devices

While some other manufacturers combine multiple solid state drives to a RAID 0 array, Asus is satisfied with a single-SSD solution. That's good because RAID laptops are only "paper tigers" apart from the sequential read and write rates. Asus takes the better course and installs a PCI Express SSD that is not tied to the SATA III limit, which restricts the performance of standard SSDs to 500-550 MB/s.

According to our information, the 256 GB Samsung XP941 can get quite hot, but it scores with top performance. Only RAID laptops accomplish 1114 and 825 MB/s in the sequential read test of CrystalDiskMark. The XP941 also processes small files at an agreeable speed.

Although the secondary storage device lags behind massively due to its HDD technology, HGST's Travelstar 7K1000 does not give us reason for complaint. Its high capacity (1000 GB) and its swift speed (7200 rpm) ensure a good performance. Up to 144 MB/s in CrystalDiskMark is rather unusual for an HDD.

Samsung SSD XP941 MZHPU256HCGL
Sequential Read: 1114 MB/s
Sequential Write: 825.7 MB/s
512K Read: 613.6 MB/s
512K Write: 734.6 MB/s
4K Read: 31.96 MB/s
4K Write: 82.52 MB/s
4K QD32 Read: 327.3 MB/s
4K QD32 Write: 249.6 MB/s

Graphics Card

When bracketing out the fact that Asus "only" treats the GeForce GTX 980M to four rather than the theoretically possible 8 GB, the graphics chip is impressive. 1536 arithmetic units (GTX 970M: 1280 shaders) and a memory interface of 256-bit point to an extremely high-end model.

3DMark 11 Performance
11329 points
3DMark Fire Strike Score
8559 points
Help

The GeForce GTX 980M also meets this claim in the synthetic graphic tests. 8559 points in the Fire Strike scenario of 3DMark is even slightly higher than that of the contenders (Gigabyte P37X, Alienware 17 R2, MSI GT72, etc.). A laptop with a GeForce GTX 970M is over 20% slower here. It looks similar in the Unigine Heaven 4.0 benchmark. Schenker's XMG U705 test configuration undercuts the 59 fps by almost 24%. Buyers minding the price-performance ratio should nevertheless take the GeForce GTX 970M. We think the higher price of the GTX 980M is marginal.

3DMark - 1920x1080 Fire Strike Score (sort by value)
Asus G751JY
NVIDIA GeForce GTX 980M
8559 Points ∼37%
Gigabyte P37X
NVIDIA GeForce GTX 980M
8304 Points ∼36% -3%
Alienware 17 R2
NVIDIA GeForce GTX 980M
8185 Points ∼35% -4%
MSI GT72-2QE16SR21BW
NVIDIA GeForce GTX 980M
8429 Points ∼36% -2%
Schenker XMG U705
NVIDIA GeForce GTX 970M
6667 Points ∼29% -22%
3DMark 11 - 1280x720 Performance (sort by value)
Asus G751JY
NVIDIA GeForce GTX 980M
11329 Points ∼39%
Gigabyte P37X
NVIDIA GeForce GTX 980M
10864 Points ∼38% -4%
Alienware 17 R2
NVIDIA GeForce GTX 980M
11122 Points ∼39% -2%
MSI GT72-2QE16SR21BW
NVIDIA GeForce GTX 980M
11325 Points ∼39% 0%
Schenker XMG U705
NVIDIA GeForce GTX 970M
9719 Points ∼34% -14%
Unigine Heaven 4.0 - Extreme Preset DX11 (sort by value)
Asus G751JY
NVIDIA GeForce GTX 980M
59 fps ∼33%
MSI GT72-2QE16SR21BW
NVIDIA GeForce GTX 980M
57.8 fps ∼32% -2%
Schenker XMG U705
NVIDIA GeForce GTX 970M
45.1 fps ∼25% -24%

Gaming Performance

Outstanding: According to the gaming tests, G-Sync does not reduce the performance in any way. Schenker's W504 that we use for the gaming articles calculates roughly just as fast with disabled V-Sync. The G-Sync generally makes a well-developed impression in terms of driver. We did not encounter any crashes or bugs. As known from the GTX 980M, the 28 nm model copes with almost all games using maximum details and multiple anti-aliasing. Only more serious stutters might be noticed in 4K resolutions and very demanding games (The Witcher 3, GTA VAssassin's Creed Unity).

low med. high ultra
Dirt Rally (2015) 72.5fps
The Witcher 3 (2015) 63.433.6fps
Batman: Arkham Knight (2015) 6746fps
Batman: Arkham Knight - 1920x1080 High / On AA:SM AF:16x (sort by value)
Asus G751JY
GeForce GTX 980M, 4720HQ
46 fps ∼33%
Schenker W504
GeForce GTX 980M, 4700MQ
44 (min: 28) fps ∼31% -4%
Schenker W504
GeForce GTX 970M, 4700MQ
33 (min: 22) fps ∼23% -28%
Schenker XMG A505
GeForce GTX 960M, 4720HQ
21 (min: 13) fps ∼15% -54%
The Witcher 3 - 1920x1080 Ultra Graphics & Postprocessing (HBAO+) (sort by value)
Asus G751JY
GeForce GTX 980M, 4720HQ
33.6 fps ∼29%
Schenker W504
GeForce GTX 980M, 4700MQ
32.6 (min: 25) fps ∼28% -3%
Schenker W504
GeForce GTX 970M, 4700MQ
25.8 (min: 19) fps ∼22% -23%
Schenker XMG A505
GeForce GTX 960M, 4720HQ
13.7 (min: 11) fps ∼12% -59%
Dirt Rally - 1920x1080 Ultra Preset AA:4x MS (sort by value)
Asus G751JY
GeForce GTX 980M, 4720HQ
72.5 fps ∼43%
Schenker W504
GeForce GTX 980M, 4700MQ
72 (min: 54) fps ∼43% -1%
Schenker W504
GeForce GTX 970M, 4700MQ
56.5 (min: 38) fps ∼34% -22%
Schenker XMG A505
GeForce GTX 960M, 4720HQ
32.9 (min: 25) fps ∼20% -55%

Emissions

System Noise

Even half a year after its debut, Asus' G751 belongs to the quietest laptops of its kind. The 17-inch device does not get exceedingly loud with a 3D level of 35-41 dB even in stress situations. Other gaming laptops based on a GeForce GTX 980M reach considerably more, for example MSI's GT72 with up to 46 dB or Alienware's 17 R2 with a maximum of 52 dB. Gigabyte's P37X also gets louder, which is not surprising considering its height of 23 millimeters.

Asus' G751JY tends toward midfield in idle mode. The right-hand fan is always active not least due to the lack of Optimus. The HDD is primarily heard with 33 dB otherwise - a lightly audible but not annoying rate. Fortunately, Asus' G751JY does not speed up unnecessarily as is common for many laptops. Every user should be able to tolerate short jumps to 34 dB.

Noise Level

Idle
31.2 / 33 / 34.2 dB(A)
HDD
33 dB(A)
DVD
37.6 / dB(A)
Load
34.6 / 41.4 dB(A)
 
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
 
min: dark, med: mid, max: light   Voltcraft sl-320 (15 cm distance)
Asus G751JY
GeForce GTX 980M, 4720HQ
Gigabyte P37X
GeForce GTX 980M, 4720HQ
Alienware 17 R2
GeForce GTX 980M, 4980HQ
MSI GT72-2QE16SR21BW
GeForce GTX 980M, 5700HQ
Schenker XMG U705
GeForce GTX 970M, 4790
Noise
-18%
-8%
-7%
-6%
Idle Minimum *
31.2
36.3
-16%
29.4
6%
33.2
-6%
29.2
6%
Idle Average *
33
36.4
-10%
30.8
7%
33.6
-2%
32.6
1%
Idle Maximum *
34.2
36.5
-7%
35
-2%
34.4
-1%
33.2
3%
Load Average *
34.6
47
-36%
43.4
-25%
39.3
-14%
44.2
-28%
Load Maximum *
41.4
51.1
-23%
51.6
-25%
46.4
-12%
45.4
-10%

* ... smaller is better

Temperature

Stress test
Stress test

Despite the less than perfect load rates, we would call the temperatures good. Up to 47 °C on the upper side and 52 °C on the underside are common for a premium-range product (60 minutes stress test via Furmark and Prime95). The chassis did not feel hot during "normal" 3D operation, i.e. games, etc., which is primarily due to the cool wrist rest.

The situation under the hood is not critical, either. Neither the processor nor the graphics card came close to 100 °C under full load. Just below 88 °C on the Core i7 4720HQ and an average of 81 °C on the GeForce GTX 980M are not disconcerting. Only the clock behavior could be criticized. Although the CPU dropped to 800 MHz for a moment in the stress test, the GPU's clock was reduced to approximately 900 MHz from 1038 - 1127 MHz after a while. However, gaming routine should not be affected since the Unigine Heaven 4.0 benchmark did not provoke throttling.

Max. Load
 41.4 °C46.8 °C44 °C 
 41.3 °C44.7 °C43.2 °C 
 31.1 °C31.9 °C30.4 °C 
Maximum: 46.8 °C
Average: 39.4 °C
51.9 °C46.3 °C49.2 °C
49.2 °C42.2 °C44.4 °C
31.9 °C32 °C28.7 °C
Maximum: 51.9 °C
Average: 41.8 °C
Power Supply (max.)  52.5 °C | Room Temperature 25 °C | Voltcraft IR-900
Asus G751JY
GeForce GTX 980M, 4720HQ
Gigabyte P37X
GeForce GTX 980M, 4720HQ
Alienware 17 R2
GeForce GTX 980M, 4980HQ
MSI GT72-2QE16SR21BW
GeForce GTX 980M, 5700HQ
Schenker XMG U705
GeForce GTX 970M, 4790
Heat
-26%
-2%
-4%
-16%
Maximum Upper Side *
46.8
50
-7%
50.8
-9%
45
4%
46.6
-0%
Maximum Bottom *
51.9
66.8
-29%
48.7
6%
54.9
-6%
55
-6%
Idle Upper Side *
30.7
36.2
-18%
30.9
-1%
32.4
-6%
38.8
-26%
Idle Bottom *
30.5
45.2
-48%
31.7
-4%
32.4
-6%
40
-31%

* ... smaller is better

Energy Management

Power Consumption

Particularly the consumption rates show that the G751JY does not feature graphics switching. Although the 17-inch laptop consumes a bit more power with 24.2 - 33.9 watts than the Broadwell model of MSI's GT72 (28.0-35.7 watts) in idle, the rates are not overwhelming compared with an Optimus laptop. The test configuration of Alienware's 17 R2 was satisfied with 8.9-26.6 watts despite its stronger CPU.

The 3D-load consumption is surprisingly low. In contrast to 124 (Alienware 17 R2) or 101 watts (MSI GT72), the G751JY only consumed about 93 watts in the first scene of 3DMark06. A maximum of 197 watts during full load is also acceptable in view of the existing power. The power supply has enough capacity with a nominal power of 230 watts.

Power Consumption
Off / Standbydarklight 0.1 / 0.7 Watt
Idledarkmidlight 24.2 / 29.4 / 33.9 Watt
Load midlight 93.4 / 196.8 Watt
 color bar
Key: min: dark, med: mid, max: light        Voltcraft VC 940
Asus G751JY
GeForce GTX 980M, 4720HQ
Alienware 17 R2
GeForce GTX 980M, 4980HQ
MSI GT72-2QE16SR21BW
GeForce GTX 980M, 5700HQ
Schenker XMG U705
GeForce GTX 970M, 4790
Power Consumption
23%
-10%
-32%
Idle Minimum *
24.2
8.9
63%
28
-16%
38.3
-58%
Idle Average *
29.4
16
46%
33.3
-13%
38.8
-32%
Idle Maximum *
33.9
26.6
22%
35.7
-5%
44.4
-31%
Load Average *
93.4
124
-33%
101
-8%
119.3
-28%
Load Maximum *
196.8
165.8
16%
212.2
-8%
221.4
-13%

* ... smaller is better

Battery Runtime

Asus tries to mask the high idle requirement with a strong 8-cell battery. The 6000 mAh model manages between 1.5 and 3.5 hours depending on screen brightness, energy-saving mode, and application, which is roughly on par with MSI's GT72. Optimus laptops, such as Alienware's 17 R2, run two to four times longer in some cases. The non-G-Sync model of the G751JY also lasted longer in the battery assessments (4.5 hours maximum thanks to lower power consumption).

Battery Runtime
Idle (without WLAN, min brightness)
3h 30min
Load (maximum brightness)
1h 19min
Asus G751JY
GeForce GTX 980M, 4720HQ
Gigabyte P37X
GeForce GTX 980M, 4720HQ
Alienware 17 R2
GeForce GTX 980M, 4980HQ
MSI GT72-2QE16SR21BW
GeForce GTX 980M, 5700HQ
Schenker XMG U705
GeForce GTX 970M, 4790
Battery Runtime
49%
137%
5%
-10%
Reader / Idle
210
332
58%
729
247%
225
7%
138
-34%
Load
79
110
39%
100
27%
81
3%
91
15%

Pro

+ Bright, high-contrast IPS screen
+ Moderate noise development
+ Generous touchpad
+ First-rate performance
+ Backlit keyboard
+ Decent build
+ Rich sound
+ PCIe x4 SSD
+ Thunderbolt
+ G-Sync

Cons

- Battery and fan not directly accessible
- Sensitive soft-touch surfaces
- Slightly unfavorable interface distribution
- Relatively high idle consumption
- Throttling under full load
- Limited opening angles
- Mediocre battery life
- High weight
- Bulky chassis

Verdict

In review: Asus G751JY. Test sample courtesy of Nvidia Germany.
In review: Asus G751JY. Test sample courtesy of Nvidia Germany.

The "inspection" confirmed the impressions of our first review. Of course, the G751JY has its shortcomings. In addition to the unfavorable interface positioning, the short battery life and high weight of approximately 4.2 kilograms could be listed on the con side. However, we did not discover any severe weaknesses that would thwart a purchase recommendation.

The Asus G751JY is perfect for buyers wanting the quietest possible high-performance gaming companion.

G-Sync has not yet impressed us much because its impact was often only barely or marginally perceivable. The latter issue might be connected to the tested applications, though. Hardcore gamers who notice even the slightest irregularity in image buildup might think differently about this feature. The classic V-Sync will satisfy "normal" gamers in future, especially since vertical synchronization is not always needed for a trouble-free image.

We basically think that G-Sync is a nice extra that refines gaming experience to a slight but not extreme extent. However, we will have to test a certain number of laptops before we can come to a detailed verdict.

Asus G751JY - 07/05/2015 v4(old)
Florian Glaser

Chassis
84 / 98 → 86%
Keyboard
88%
Pointing Device
86%
Connectivity
73 / 81 → 90%
Weight
48 / 66 → 68%
Battery
73%
Display
88%
Games Performance
99%
Application Performance
97%
Temperature
82 / 95 → 86%
Noise
81 / 90 → 90%
Audio
85%
Average
82%
89%
Gaming - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Archive of our own reviews > Asus G751JY G-Sync Notebook Review
Florian Glaser, 2015-07- 7 (Update: 2015-07- 7)