Eurocom Nightsky Ti15 (Clevo PB51RF) Laptop Review

The Nightsky series is Eurocom's latest family of narrow bezels laptops for enthusiast gamers. It currently consists of the 15.6-inch Nightsky RX15 and 17.3-inch Nightsky RX17 which we had checked out earlier last month. Both models share a similar design language and so we recommend checking out our Nightsky RX17 review page to learn more about the chassis, keyboard, and other physical features.
The Nightsky Ti15/RX15 can be configured with either a Core i7-9750H or unlocked Core i9-9980HK CPU, GeForce GTX 1660 Ti or GeForce RTX 2070 GPU, and a 144/240 Hz 1080p IPS or 60 Hz 4K UHD OLED display. Our test unit today is the lower Ti15 configuration with GeForce 1660 Ti graphics, i7-9750H CPU, and 144 Hz panel retailing for about 2200 USD or less depending on the storage selection. The Nightsky Ti 15 is otherwise visually identical to the Nightsky RX15.
Direct competitors to the Eurocom Nightsky TI15/RX15 include other 15.6-inch mid-range to higher-end gaming laptops like the Asus Zephyrus M GM501, Asus ROG Strix Scar G531, MSI GE63, Razer Blade 15, Aorus 15, or the Dell Alienware m15 series.
More Eurocom reviews:
Case
Chassis quality is so much better than the super-thin Eurocom Q6 or Q8. Surfaces do not creak or bend as easily and they actually feel thicker and more robust. In other words, it doesn't feel like Clevo made as many sacrifices just to create a thinner or lighter design. The lid in particular does not feel any weaker or stronger than the lids of the larger Eurocom Sky X4C or Tornado F5 for a strong first impression. Overall quality is superior to the MSI GP65 and on par with the Asus ROG Strix III G531.
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In terms of size and weight, the Eurocom is very nearly the same as the HP Pavilion Gaming 15 but much thicker (29.9 mm vs. 23.4 mm) and slightly heavier (2.5 kg vs. 2.4 kg). The narrow bezels make this one of the smallest and most compact 15-inch gaming laptops from Clevo thus far.
Connectivity
Port options and positioning are the same as on the larger 17.3-inch Nightsky RX17 including the unusual SD card reader along the front edge. The system has more ports than most other gaming laptops.
SD Card Reader
Eurocom laptops typically have very fast SD card readers and the Nightsky series is no exception. Moving 1 GB worth of pictures from our UHS-II test card to desktop takes only about 6 seconds compared to almost 15 seconds on the HP Omen 15.
A fully inserted SD card sites almost flush against the edge of the chassis for safe transporting.
SDCardreader Transfer Speed | |
average JPG Copy Test (av. of 3 runs) | |
Razer Blade Pro 17 RTX 2060 (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
Eurocom Nightsky Ti15 (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
HP Omen 15-dc1020ng (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
HP Gaming Pavilion 15-dk0009ng (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
Dell G5 15 5590 (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
maximum AS SSD Seq Read Test (1GB) | |
Eurocom Nightsky Ti15 (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
Razer Blade Pro 17 RTX 2060 (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
HP Omen 15-dc1020ng (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
HP Gaming Pavilion 15-dk0009ng (Toshiba Exceria Pro SDXC 64 GB UHS-II) | |
Dell G5 15 5590 (Toshiba Exceria Pro SDXC 64 GB UHS-II) |
Communication
Networking | |
iperf3 Client (receive) TCP 1 m 4M x10 | |
Eurocom Nightsky Ti15 | |
Aorus 15-SA | |
Dell G5 15 5590 | |
HP Omen 15-dc1020ng | |
iperf3 Client (transmit) TCP 1 m 4M x10 | |
Aorus 15-SA | |
HP Omen 15-dc1020ng | |
Eurocom Nightsky Ti15 | |
Dell G5 15 5590 |
Maintenance
Warranty
The standard one-year limited warranty applies with options to extend up to three years.
Input Devices
Keyboard and Touchpad
The Nightsky RX15 shares the same keyboard and touchpad as on the RX17 despite their screen size differences. Even the dimensions of the touchpad between the two models are identical. Thus, all our comments from the Nightsky RX17 apply here on the RX15.
Display
The AU Optronics B156HAN 144 Hz IPS panel here can also be found on other gaming laptops like the Dell G5 15 5590, Alienware m15, or Asus Zephyrus S GX531GX for a similar viewing experience between them. Contrast ratio is high at nearly 1000:1, response times are fast at about 4 ms to 7 ms for reduced ghosting, and brightness is brighter than on both the HP Omen 15 and the aforementioned Dell. The panel is slightly grainy but that is to be expected from a matte overlay.
Perhaps the worst aspect of the display is its moderate uneven backlight bleeding as shown by our picture below. A small level of bleeding is always expected from most IPS panels, but it's disappointing to see it here on at such noticeable levels especially on an enthusiast gaming laptop.
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Brightness Distribution: 83 %
Center on Battery: 331 cd/m²
Contrast: 946:1 (Black: 0.35 cd/m²)
ΔE Color 4.22 | 0.6-29.43 Ø5.7, calibrated: 3.27
ΔE Greyscale 3.9 | 0.64-98 Ø5.9
90.5% sRGB (Argyll 3D) 59% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.26
Eurocom Nightsky Ti15 AU Optronics B156HAN, IPS, 15.60, 1920x1080 | Aorus 15-SA LG Philips LP156WFG-SPB2 (LGD05E8), IPS, 15.60, 1920x1080 | Dell G5 15 5590 AU Optronics B156HAN, IPS, 15.60, 1920x1080 | HP Omen 15-dc1020ng LGD05CE, IPS, 15.60, 1920x1080 | HP Gaming Pavilion 15-dk0009ng LG Philips LGD05FE, IPS, 15.60, 1920x1080 | MSI GE63 Raider RGB 8RF-008 CMN N156HHE-GA1 (CMN15F4), TN, 15.60, 1920x1080 | |
---|---|---|---|---|---|---|
Response Times | -21% | -213% | -193% | -11% | -67% | |
Response Time Grey 50% / Grey 80% * | 14.4 (7.2, 7.2) | 15.6 (8, 7.6) -8% | 45 (22, 23) -213% | 40 (21.2, 18.8) -178% | 16.4 (8.4, 8) -14% | 24.4 (14.4, 10) -69% |
Response Time Black / White * | 9.6 (5.2, 4.4) | 12.8 (8.4, 4.4) -33% | 30 (17, 13) -213% | 29.6 (17.2, 12.4) -208% | 10.4 (5.2, 5.2) -8% | 15.8 (13.8, 2) -65% |
PWM Frequency | 25510 (19) | |||||
Screen | 8% | -40% | -27% | 22% | 0% | |
Brightness middle | 331 | 266 -20% | 234 -29% | 251 -24% | 345 4% | 292 -12% |
Brightness | 327 | 254 -22% | 219 -33% | 232 -29% | 324 -1% | 258 -21% |
Brightness Distribution | 83 | 90 8% | 82 -1% | 76 -8% | 86 4% | 81 -2% |
Black Level * | 0.35 | 0.28 20% | 0.17 51% | 0.17 51% | 0.42 -20% | 0.23 34% |
Contrast | 946 | 950 0% | 1376 45% | 1476 56% | 821 -13% | 1270 34% |
Colorchecker DeltaE2000 * | 4.22 | 3.11 26% | 8.6 -104% | 6.2 -47% | 1.3 69% | 5.82 -38% |
Colorchecker DeltaE2000 max. * | 6.95 | 5.84 16% | 17.49 -152% | 18.6 -168% | 2.8 60% | 9.05 -30% |
Colorchecker DeltaE2000 calibrated * | 3.27 | 1.37 58% | 4.06 -24% | 4.8 -47% | 1.1 66% | 2.82 14% |
Greyscale DeltaE2000 * | 3.9 | 3.94 -1% | 8.55 -119% | 4.2 -8% | 1.2 69% | 4.61 -18% |
Gamma | 2.26 97% | 2.53 87% | 3.02 73% | 2.32 95% | 2.31 95% | 2.65 83% |
CCT | 7392 88% | 6210 105% | 7802 83% | 7454 87% | 6476 100% | 6950 94% |
Color Space (Percent of AdobeRGB 1998) | 59 | 60 2% | 37 -37% | 36.5 -38% | 60.5 3% | 76 29% |
Color Space (Percent of sRGB) | 90.5 | 93 3% | 59 -35% | 57.4 -37% | 94.9 5% | 100 10% |
Total Average (Program / Settings) | -7% /
4% | -127% /
-66% | -110% /
-53% | 6% /
17% | -34% /
-10% |
* ... smaller is better
Further measurements with an X-Rite colorimeter reveal generally good grayscale and colors out of the box. Our calibration attempt improves the display even further with final average grayscale and color deltaE values of 2.2 and 3.27, respectively.
Display Response Times
↔ Response Time Black to White | ||
---|---|---|
9.6 ms ... rise ↗ and fall ↘ combined | ↗ 5.2 ms rise | |
↘ 4.4 ms fall | ||
The screen shows fast response rates in our tests and should be suited for gaming. In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 11 % of all devices are better. This means that the measured response time is better than the average of all tested devices (24.3 ms). | ||
↔ Response Time 50% Grey to 80% Grey | ||
14.4 ms ... rise ↗ and fall ↘ combined | ↗ 7.2 ms rise | |
↘ 7.2 ms fall | ||
The screen shows good response rates in our tests, but may be too slow for competitive gamers. In comparison, all tested devices range from 0.8 (minimum) to 636 (maximum) ms. » 12 % of all devices are better. This means that the measured response time is better than the average of all tested devices (38.6 ms). |
Screen Flickering / PWM (Pulse-Width Modulation)
Screen flickering / PWM not detected | |||
In comparison: 51 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 9700 (minimum: 5 - maximum: 142900) Hz was measured. |
Outdoor visibility is pretty good when under shade, but otherwise poor when under sunlight or on a bright cloudy day. This system was not designed to be used outdoors frequently despite the matte panel, narrow bezels, and wide viewing angles.
Performance
The Eurocom Nightsky 15 series is unusual because it has only Core i7 and Core i9 options with GeForce GTX 1660 Ti or RTX 2070 graphics and nothing else. This makes the system one of the only gaming laptops you can configure with an enthusiast Core i9-9980HK CPU and a budget-midrange GTX 1660 Ti.
LatencyMon shows no DPC latency issues. Eurocom and Clevo systems are generally very light when it comes to pre-loaded applications and so background activities are kept to a minimum.
Processor
CPU performance is almost 10 percent faster than the average Core i7-9750H in our database according to CineBench R15. However, this healthy lead doesn't last very long as maximum Turbo Boost is only temporary. When running CineBench R15 Multi-Thread in a loop, performance drops by about 15 percent from the high initial score as shown by our graph below. Raw performance is still significantly faster than the quad-core Core i7-9300H and older Core i7-7700HQ by about 60 to 70 percent.
See our dedicated page on the Core i7-9750H for more technical information and benchmark comparisons.
Cinebench R15 | |
CPU Single 64Bit | |
Schenker | |
Eurocom Sky X4C | |
Alienware m17 P37E | |
MSI GE75 9SG | |
Average Intel Core i7-9750H (170 - 194, n=82) | |
MSI GF63 8RC-040XPL | |
HP Omen 15-dc1303ng | |
Eurocom Nightsky Ti15 | |
Asus FX503VM-EH73 | |
Asus ROG GA502DU | |
CPU Multi 64Bit | |
Schenker | |
Schenker | |
MSI GE75 9SG | |
Eurocom Sky X4C | |
Eurocom Nightsky Ti15 | |
Alienware m17 P37E | |
Average Intel Core i7-9750H (952 - 1306, n=85) | |
HP Omen 15-dc1303ng | |
MSI GF63 8RC-040XPL | |
Asus ROG GA502DU | |
Asus FX503VM-EH73 |
Cinebench R11.5 | |
CPU Single 64Bit | |
Eurocom Sky X4C | |
MSI GE75 9SG | |
Average Intel Core i7-9750H (1.96 - 2.19, n=10) | |
Eurocom Nightsky Ti15 | |
Asus FX503VM-EH73 | |
Asus ROG GA502DU | |
CPU Multi 64Bit | |
MSI GE75 9SG | |
Eurocom Sky X4C | |
Eurocom Nightsky Ti15 | |
Average Intel Core i7-9750H (11.3 - 14.1, n=10) | |
Asus ROG GA502DU | |
Asus FX503VM-EH73 |
Cinebench R10 | |
Rendering Multiple CPUs 32Bit | |
MSI GE75 9SG | |
Eurocom Sky X4C | |
Average Intel Core i7-9750H (28251 - 36304, n=13) | |
Asus FX503VM-EH73 | |
Asus ROG GA502DU | |
Rendering Single 32Bit | |
Eurocom Sky X4C | |
MSI GE75 9SG | |
Average Intel Core i7-9750H (6659 - 7214, n=13) | |
Asus FX503VM-EH73 | |
Asus ROG GA502DU |
wPrime 2.10 - 1024m | |
MSI GF63 8RC-040XPL | |
Asus FX503VM-EH73 | |
Asus ROG GA502DU | |
Average Intel Core i7-9750H | |
Eurocom Sky X4C | |
MSI GE75 9SG |
* ... smaller is better
System Performance
PCMark benchmarks are where we expect them to be in relation to other gaming laptops with a similar class GPU. The much larger and more powerful Eurocom Sky X7C with its desktop i9-9900K and GeForce RTX 2080 is still the champ in these particular tests.
We experienced no software or hardware issues during our time with the test unit.
PCMark 8 | |
Work Score Accelerated v2 | |
Eurocom Sky X7C i9-9900K | |
Aorus 15-SA | |
Average Intel Core i7-9750H, NVIDIA GeForce GTX 1660 Ti Mobile (5041 - 5913, n=12) | |
Eurocom Nightsky Ti15 | |
Dell G5 15 5590 | |
MSI GE63 Raider RGB 8RF-008 | |
HP Omen 15-dc1020ng | |
Home Score Accelerated v2 | |
Eurocom Sky X7C i9-9900K | |
Aorus 15-SA | |
Average Intel Core i7-9750H, NVIDIA GeForce GTX 1660 Ti Mobile (4074 - 5217, n=11) | |
MSI GE63 Raider RGB 8RF-008 | |
Eurocom Nightsky Ti15 | |
Dell G5 15 5590 | |
HP Omen 15-dc1020ng |
PCMark 8 Home Score Accelerated v2 | 4240 points | |
PCMark 8 Work Score Accelerated v2 | 5497 points | |
PCMark 10 Score | 5814 points | |
Help |
Storage Devices
There are two M.2 PCIe slots with RAID compatibility and a single 2.5-inch SATA III bay available. Our unit comes equipped with a single 512 GB Samsung SSD 970 Pro with sequential read and write rates of over 2100 MB/s each according to AS SSD. Samsung produces some of the fastest NVMe drives for consumers and this is no different.
Since servicing can be a pain, however, we recommend configuring wisely before committing to a purchase.
Eurocom Nightsky Ti15 Samsung SSD 970 Pro 512GB | Aorus 15-SA Intel SSD 760p SSDPEKKW512G8 | Dell G5 15 5590 KBG30ZMS128G | HP Omen 15-dc1020ng WDC PC SN720 SDAQNTW-512G | HP Gaming Pavilion 15-dk0009ng Samsung SSD PM981 MZVLB256HAHQ | |
---|---|---|---|---|---|
AS SSD | -25% | -469% | -16% | -52% | |
Copy Game MB/s | 1020.79 | 106.32 | 907.05 | 399.89 | |
Copy Program MB/s | 387.69 | 94.45 | 392.55 | 371.74 | |
Copy ISO MB/s | 2103.58 | 159.22 | 1417.66 | 1042.93 | |
Score Total | 4924 | 2938 -40% | 620 -87% | 4323 -12% | 2014 -59% |
Score Write | 2510 | 1175 -53% | 174 -93% | 1901 -24% | 819 -67% |
Score Read | 1590 | 1193 -25% | 318 -80% | 1619 2% | 810 -49% |
Access Time Write * | 0.029 | 0.034 -17% | 0.255 -779% | 0.032 -10% | 0.038 -31% |
Access Time Read * | 0.04 | 0.05 -25% | 1.519 -3698% | 0.084 -110% | 0.093 -133% |
4K-64 Write | 2162.27 | 914.36 -58% | 95.21 -96% | 1538.26 -29% | 587.71 -73% |
4K-64 Read | 1320.36 | 876.55 -34% | 184.51 -86% | 1282.6 -3% | 564.81 -57% |
4K Write | 128.49 | 110.3 -14% | 67.75 -47% | 118.58 -8% | 96.52 -25% |
4K Read | 53.2 | 56.27 6% | 29.6 -44% | 40.56 -24% | 36.14 -32% |
Seq Write | 2194.01 | 1506.85 -31% | 115.06 -95% | 2439.74 11% | 1346.75 -39% |
Seq Read | 2168.13 | 2600.57 20% | 1035.81 -52% | 2955.46 36% | 2087.58 -4% |
* ... smaller is better
GPU Performance
The mobile GeForce GTX 1660 Ti is about 30 to 60 percent faster than the older mobile GTX 1060. Nvidia has optimized its Turing cards for DX12 and so you'll see the biggest gains when playing newer games. Raw GPU performance is only about 5 percent slower than our desktop GeForce 1660 Ti reference.
3DMark 11 Performance | 18245 points | |
3DMark Cloud Gate Standard Score | 37206 points | |
3DMark Fire Strike Score | 13610 points | |
3DMark Time Spy Score | 5872 points | |
Help |
Gaming Performance
The system is powerful enough to play the latest games at native 1080p and 60 FPS with most settings on medium to maximum. Note that performance is very similar to the more expensive mobile RTX 2060 sans the ray-tracing and DLSS support.
See our dedicated page on the mobile GeForce GTX 1660 Ti for more technical information and benchmark comparisons.
Shadow of the Tomb Raider - 1920x1080 Highest Preset AA:T | |
MSI GE75 9SG | |
Asus ASUS ROG Strix SCAR III G731GW-XB74 | |
Alienware m15 P79F | |
Razer Blade Pro 17 RTX 2060 | |
Zotac GeForce GTX 1660 Ti 6 GB | |
Asus Strix GL531GV-PB74 | |
Eurocom Nightsky Ti15 | |
Average NVIDIA GeForce GTX 1660 Ti Mobile (62 - 73, n=8) | |
HP Omen 15-dc0015ng | |
Asus ROG GA502DU | |
Asus GX531GM (Zephyrus S) |