Intel Iris Plus Graphics 640 vs Intel Iris Plus Graphics 645
Intel Iris Plus Graphics 640
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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.
Intel Iris Plus Graphics 645
► remove from comparisonThe Intel Iris Plus Graphics 645 (GT3e) is a processor graphics card that was first seen in the Apple MacBook Pro 13 (Entry, 2019) in mid 2019. It is similar to the Iris Plus Graphics 655 in the 28 Watt CPUs.
The so called GT3e version of the Coffee-Lake GPU still has 48 Execution Units (EUs), which can reach up to 1150 MHz depending on the model. Besides eDRAM cache, the Iris 645 can also access the system memory (2x 64 Bit DDR3L-2133/DDR4-2400) via processor interface.
Performance
The exact performance of the Iris Plus Graphics 645 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 i7-8557U. Depending on the game, the Iris Plus 655 will probably be on par with a dedicated GeForce 930M or GeForce 940MX and can handle smooth gameplay in modern titles in low up to medium settings.
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 645 is used for 15-Watt processor and therefore small-sized notebooks.
| Intel Iris Plus Graphics 640 | Intel Iris Plus Graphics 645 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Gen. 9.5 Series |
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| Codename | Kaby Lake GT3e | Kaby Lake GT3e | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Architecture | Gen. 9.5 Kaby Lake | Gen. 9.5 Coffee Lake | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Pipelines | 48 - unified | 48 - unified | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Core Speed | 300 - 1050 (Boost) MHz | 300 - 1150 (Boost) MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Memory Bus Width | 64/128 Bit | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Memory Type | DDR3/DDR4 | DDR3, DDR4 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Max. Amount of Memory | 64 MB | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shared Memory | yes | yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| API | DirectX 12_1, OpenGL 4.4 | DirectX 12_1, OpenGL 4.5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| technology | 14 nm | 14 nm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Features | QuickSync | QuickSync | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Date of Announcement | 03.01.2017 | 10.07.2019 |
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Benchmarks
Cinebench R15 OpenGL 64 Bit + Intel Iris Plus Graphics 640
GFXBench T-Rex HD Offscreen C24Z16 + Intel Iris Plus Graphics 640
Average Benchmarks Intel Iris Plus Graphics 640 → 100% n=11
Average Benchmarks Intel Iris Plus Graphics 645 → 142% n=11
- Average benchmark values for this graphics card* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation
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 detailed information on the benchmark results, click on the fps number.
X-Plane 11.11
2018
The Evil Within 2
2017
FIFA 18
2017
F1 2017
2017
Team Fortress 2
2017
Rocket League
2017
Prey
2017
For Honor
2017
Titanfall 2
2016
Farming Simulator 17
2016
Battlefield 1
2016
Overwatch
2016
The Division
2016
Far Cry Primal
2016
Rainbow Six Siege
2015
Dota 2 Reborn
2015
The Witcher 3
2015
GTA V
2015
Sims 4
2014
Battlefield 4
2013
BioShock Infinite
2013
Tomb Raider
2013
Diablo III
2012
World of Warcraft
2005Average Gaming Intel Iris Plus Graphics 640 → 100%
Average Gaming 30-70 fps → 100%
Average Gaming Intel Iris Plus Graphics 645 → 131%
Average Gaming 30-70 fps → 127%
| Intel Iris Plus Graphics 640 | Intel Iris Plus Graphics 645 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| low | med. | high | ultra | QHD | 4K | low | med. | high | ultra | QHD | 4K | |||
| X-Plane 11.11 | 37.4 | 26.1 | 22.5 | |||||||||||
| Dota 2 Reborn | 80 | 59 | 29 | 21 | 76.5 | 57.3 | 29 | 26.9 | ||||||
| BioShock Infinite | 65 | 43 | 36 | 12 | 104.6 | 60 | 51.6 | 22.1 | ||||||
| Intel Iris Plus Graphics 640 | Intel Iris Plus Graphics 645 | |||||||||||||
| low | med. | high | ultra | QHD | 4K | low | med. | high | ultra | QHD | 4K | < 30 fps < 60 fps < 120 fps ≥ 120 fps | 2 | 2 | 1 1 | 2 | | | < 30 fps < 60 fps < 120 fps ≥ 120 fps | 1 2 | 1 1 1 | 2 1 | 2 | | |
For more games that might be playable and a list of all games and graphics cards visit our Gaming List
