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.


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.


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.

Gen. 9.5 Series
Iris Plus Graphics 650 48 @ 300 - 1100 (Boost) MHz64/128 Bit
Iris Plus Graphics 640 48 @ 300 - 1050 (Boost) MHz64/128 Bit
HD Graphics 630 24 @ 300 - 1150 (Boost) MHz64/128 Bit
HD Graphics P630 24 64/128 Bit
HD Graphics 620 24 @ 300 - 1050 (Boost) MHz64/128 Bit
HD Graphics 615 24 @ 300 - 1050 (Boost) MHz64/128 Bit
CodenameKaby Lake GT3e
ArchitectureIntel Gen. 9.5 (Kaby Lake)
Pipelines48 - unified
Core Speed *300 - 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
Date of Announcement03.01.2017
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.
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


Cinebench R15
Ref. Match 64Bit +
OpenGL 64Bit +
3DMark - Cloud Gate Standard Graphics 1280x720
min: 11232     avg: 11232 (7%)     median: 11232 (7%)     max: 11232 Points
3DMark - Ice Storm Unlimited Graphics Score 1280x720 offscreen
min: 145481     avg: 145481 (32%)     median: 145481 (32%)     max: 145481 Points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

For more games that might be playable and a list of all games and graphics cards visit our Gaming List

Notebook reviews with Intel Iris Plus Graphics 640 graphics card

HP Spectre x2 12-C001NF: Intel Core i5-7260U, 13.3", 1.1 kg
  External Review » HP Spectre x2 12-C001NF

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Class 1
Class 2
GeForce GTX 580
Radeon HD 6970
GeForce GTX 570
GeForce GTX 560 Ti
Radeon HD 5850
Radeon HD 7770
Radeon HD 7770
GeForce GTX 460 768MB
Radeon HD 6790
Radeon HD 5770
GeForce GTX 550 Ti
Radeon HD 4850
Class 3
GeForce GTS 450
Radeon HD 5670
GeForce GT 240
GeForce GT 430
Class 4
Radeon HD 5570
GeForce GT 220
Radeon HD 6450 GDDR5
Class 5
Radeon HD 4350
GeForce G 107M *
Chrome9HD *
Class 6
unknown *

* Approximate position of the graphics adapter

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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Comparison of Laptop Graphics Cards > Intel Iris Plus Graphics 640
Klaus Hinum (Update: 2017-01- 5)