Intel Iris Plus Graphics 645 vs Intel UHD Graphics (Elkhart Lake 32 EU) vs Intel UHD Graphics G7 (Lakefield GT2 64 EU)
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 UHD Graphics (Elkhart Lake 32 EU)
► remove from comparisonThe Intel UHD Graphics 32EUs Elkhart Lake (Gen. 11) is an integrated graphics card (iGPU) in the Elkhart Lake Pentium and Celeron SoCs (e.g., Pentium J6226). It was announced in early 2021 and is used in the high end Elkhart Lake CPUs. It uses all 32 execution units and offers no dedicated graphics memory. The clock speed depends on the CPU model and ranges from 4000 MHz (minimal base clock speed) up to 850 MHz (highest Boost clock).
The gaming performance is very low and only very low demanding 3D games should be playable. The slower 16 EU variant was even struggling in our Dota 2 benchmark.
Intel UHD Graphics G7 (Lakefield GT2 64 EU)
► remove from comparisonThe Intel UHD Graphics G7 (Lakefield GT2 with 64 EUs) is an integrated graphics card in the Lakefield SoCs (e.g. Core i7-L16G7) for laptops. It offers no dedicated graphics memory (no eDRAM cache like the Intel Iris Graphics 655 predecessor of the Coffee Lake SoCs). The clock rate ranges between 200 MHz (guaranteed base clock) up to 500 MHz (boost). The TDP of the whole SoC is specified at 7 Watt.
Intel Gen.11 Graphics Cards | Cores | Base | Boost |
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Intel Iris Plus Graphics G7 Ice-Lake | 64 EUs | 300 MHz | 1100 MHz |
Intel Iris Plus Graphics G4 Ice-Lake | 48 EUs | 300 MHz | 1050 MHz |
Intel UHD Graphics G1 Ice-Lake | 32 EUs | 300 MHz | 1050 MHz |
Intel UHD Graphics G7 Lakefield | 64 EUs | 200 MHz | 500 MHz |
Intel UHD Graphics G4 Lakefield | 48 EUs | 200 MHz | 500 MHz |
The GPU performance is similar to the old Intel HD Graphics 630 and therefore only some low demanding games like League of Legends should run with the UHD Graphics.
A special new feature of the Gen11 graphics card is the new Variable Rate Shading (VRS) support. With it game designers can decide where to spend shading time and e.g. shade object in the background or behind fog with less resolution (up to using only one source for a 4x4 block). With this technique early results show up to 1.3x performance in Unreal Engine POC and 1.2x speedup in Civ 6. Up to now VRS is only supported by the new Nvidia Turing architecture (GTX 1650 and up).
The Lakefield SoCs and therefore the integrated GPU are manufactured in the modern 10nm process at Intel that should be comparable to the 7nm process of TSMC.
Intel Iris Plus Graphics 645 | Intel UHD Graphics (Elkhart Lake 32 EU) | Intel UHD Graphics G7 (Lakefield GT2 64 EU) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Gen. 11 Series |
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Codename | Kaby Lake GT3e | Gen. 11 | Lakefield GT2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Architecture | Gen. 9.5 Coffee Lake | Gen. 11 Ice Lake | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pipelines | 48 - unified | 32 - unified | 64 - unified | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Core Speed | 300 - 1150 (Boost) MHz | 400 - 850 (Boost) MHz | 200 - 500 (Boost) MHz | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Memory Type | DDR3, DDR4 | DDR4 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Shared Memory | yes | yes | yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
API | DirectX 12_1, OpenGL 4.5 | DirectX 12_1, OpenGL 4.5, OpenCL 1.2 | DirectX 12_1, OpenGL 4.5 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
technology | 14 nm | 10 nm | 10 nm | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Features | QuickSync | QuickSync | QuickSync | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Date of Announcement | 10.07.2019 | 11.01.2021 | 28.05.2020 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Power Consumption | 4.8 - 10 Watt | 7 Watt | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displays | 3 Displays (max.) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Predecessor | UHD Graphics 600 |
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