Notebookcheck

Intel Iris Plus Graphics 640

The Intel Iris Plus Graphics 640 (GT3e) is a processor graphics card for Kaby Lake models announced in January 2017. As the successor to the Intel Iris Graphics 540 (Skylake), the Iris Plus Graphics 640 is used for 15-Watt ULV models and is equipped with 64 MB eDRAM cache. There should not be any big changes compared to the Iris Graphics 540.

The so called GT3e version of the Kaby Lake GPU still has 48 Execution Units (EUs), which can reach up to 1050 MHz depending on the model. Besides eDRAM cache, the Iris 640 can also access the system memory (2x 64 Bit DDR3L-1600/LPDDR3-1866/DDR4-2400) via processor interface.

Compared to the Iris Plus 650 from the 28-Watt models, the Iris 640 only has a slightly lower maximum clock as well as the lower TDP, so the utilization of the Turbo Boost potential should be worse.

Performance

The exact performance of the Iris Plus Graphics 640 depends on the CPU model, because maximum clock as well as the size of the L3 cache can differ a bit. The system memory (DDR3/DDR4) will influence the performance as well.

The fastest chips are high-clocked Core i7 models like the Core i7-7660U. Depending on the game, the Iris Plus 640 will probably be similar to the previous model somewhere between a dedicated GeForce 920M and GeForce 940M and is usually limited to low settings in modern games.

Features

The reworked video engine now fully supports hardware decoding of H.265/HEVC videos. Contrary to Skylake, however, Kaby Lake can now also decode H.265/HEVC Main 10 with a 10-bit color depth as well as Google's VP9 codec. The video output is possible via DP 1.2/eDP 1.3 (up to 3840 x 2160 @60 Hz), whereas HDMI is also supported in the older 1.4a standard. An HDMI 2.0 output can be added via converter from DisplayPort. The GPU can drive up to three displays simultaneously.

Power Consumption

The Iris Plus Graphics 640 is used for 15-Watt ULV processor and therefore thin notebooks and Ultrabooks.

ManufacturerIntel
Gen. 9.5 Series
Iris Plus Graphics 650 (compare) 48 @ 300 - 1100 (Boost) MHz64/128 Bit
Iris Plus Graphics 640 48 @ 300 - 1050 (Boost) MHz64/128 Bit
HD Graphics 630 (compare) 24 @ 300 - 1150 (Boost) MHz64/128 Bit
HD Graphics P630 (compare) 24 64/128 Bit
UHD Graphics 620 (compare) 24 @ 300? - 1050? (Boost) MHz64/128 Bit
HD Graphics 620 (compare) 24 @ 300 - 1050 (Boost) MHz64/128 Bit
HD Graphics 615 (compare) 24 @ 300 - 1050 (Boost) MHz64/128 Bit
CodenameKaby Lake GT3e
ArchitectureIntel Gen. 9.5 (Kaby Lake)
Pipelines48 - unified
Core Speed300 - 1050 (Boost) MHz
Memory Bus Width64/128 Bit
Memory TypeDDR3/DDR4
Max. Amount of Memory64 MB
Shared Memoryyes
DirectXDirectX 12 (FL 12_1)
technology14 nm
FeaturesQuickSync
Date of Announcement03.01.2017
CPUGPU Base SpeedGPU Boost / Turbo
Intel Core i7-7660U2 x 2500 MHz, 15 W300 MHz1050 MHz
Intel Core i7-7560U2 x 2400 MHz, 15 W300 MHz1050 MHz
Intel Core i5-7360U2 x 2300 MHz, 15 W300 MHz1000 MHz
Intel Core i5-7260U2 x 2200 MHz, 15 W300 MHz950 MHz
min. - max.300 - 300 MHz950 - 1050 MHz

Benchmarks

3DMark - Time Spy Score 2560x1440
min: 467     avg: 507.7     median: 513 (5%)     max: 543 Points
3DMark - Ice Storm Unlimited Graphics Score 1280x720 offscreen
min: 145481     avg: 149866     median: 149866 (33%)     max: 154251 Points
3DMark - Cloud Gate Standard Score 1280x720
min: 7685     avg: 7951.3     median: 8067 (16%)     max: 8102 Points
3DMark - Cloud Gate Standard Graphics 1280x720
min: 11232     avg: 11330.3     median: 11264 (7%)     max: 11495 Points
3DMark - Fire Strike Score 1920x1080
min: 1265     avg: 1333.3     median: 1310 (6%)     max: 1425 Points
3DMark - Fire Strike Graphics 1920x1080
min: 1369     avg: 1442.7     median: 1418 (3%)     max: 1541 Points
3DMark 11 - Performance 1280x720
min: 2275     avg: 2501     median: 2564 (9%)     max: 2664 points
3DMark 11 - Performance GPU 1280x720
min: 2124     avg: 2332     median: 2379 (5%)     max: 2493 points
3DMark 06 Standard 1280x1024 +
Cinebench R10 Shading 32Bit +
Cinebench R11.5 OpenGL 64Bit +
Cinebench R15
OpenGL 64Bit +
Ref. Match 64Bit +
GFXBench (DX / GLBenchmark) 2.7
T-Rex HD Offscreen C24Z16 1920x1080 +
T-Rex HD Onscreen C24Z16 +
Power Consumption - FurMark 1.19 GPU Stress Test - Power Consumption (external Monitor) 1280x720 *
min: 30.8     avg: 34.7     median: 34.7 (9%)     max: 38.5 Watt
Power Consumption - The Witcher 3 Power Consumption (external Monitor) ultra 1920x1080 *
min: 28     avg: 33.5     median: 33.5 (9%)     max: 38.9 Watt
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

Game Benchmarks

The following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailled information on the benchmark results, click on the fps number.

Dirt 4

Dirt 4

2017
med. 1920x1080
27.5 (!)  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Rocket League
low 1280x720
101 103 ~ 102 fps    + Compare
med. 1920x1080
42.6 48.2 ~ 45 fps    + Compare
high 1920x1080
29.3 33.6 ~ 31 fps    + Compare
» With all tested laptops playable in detail settings med..
Prey

Prey

2017
low 1280x720
39.9 45.4 ~ 43 fps    + Compare
med. 1920x1080
17.9 18.1 ~ 18 fps    + Compare
high 1920x1080
14.8  fps    + Compare
» With all tested laptops playable in detail settings low.
Ghost Recon Wildlands
low 1280x720
16 16.6 ~ 16 fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
For Honor

For Honor

2017
low 1280x720
30.8 33.5 ~ 32 fps    + Compare
med. 1920x1080
11.8 12.7 ~ 12 fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Titanfall 2
low 1280x720
42.9  fps    + Compare
med. 1366x768
31.4  fps    + Compare
high 1920x1080
22.9  fps    + Compare
» With all tested laptops playable in detail settings low.
Farming Simulator 17
low 1280x720
121  fps    + Compare
med. 1366x768
91  fps    + Compare
high 1920x1080
31.6  fps    + Compare
ultra 1920x1080
17.8  fps    + Compare
» With all tested laptops playable in detail settings med..
Battlefield 1
low 1280x720
26.6 38.6 ~ 33 fps    + Compare
med. 1366x768
19.6 24.2 ~ 22 fps    + Compare
high 1920x1080
9.2 11.1 ~ 10 fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Deus Ex Mankind Divided
low 1280x720
20.2  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Overwatch

Overwatch

2016
low 1280x720
63.3 67.3 ~ 65 fps    + Compare
med. 1366x768
41 52.9 ~ 47 fps    + Compare