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Intel UHD Graphics 620 vs Intel Iris Plus Graphics 655

Intel UHD Graphics 620

► remove from comparison Intel UHD Graphics 620

The Intel UHD Graphics 620 (GT2) is an integrated graphics unit, which can be found in various ULV (Ultra Low Voltage) processors of the Kaby Lake Refresh generation (8th generation Core). Compared to the similar named Intel HD Graphics 620 in the 2016 Kaby Lake CPUs, only the name changed from HD to UHD. It is clocked with up to 1.150 MHz and therefore 100 MHz higher than the old HD Graphics 620 (max. 1.050 MHz) and offer a comparable performance. Due to its lack of dedicated graphics memory or eDRAM cache, the HD 620 has to access the main memory (2x 64bit DDR3/DDR4).

Performance

The exact performance of the UHD Graphics 620 depends on various factors like L3 cache size, memory configuration (DDR3/DDR4) and maximum clock rate of the specific model and as is similar to the Intel HD Graphics 620 and Intel HD Graphics 630. Compared to the average HD Graphics 620, the UHD graphics profits from the quad-core CPU a bit in our gaming benchmarks. Therefore, should be positioned between a GeForce 910M and 920M dedicated graphics card from Nvidia. For games, the drivers however are not that fast updated and tested as with GeForce graphics cards. In our tests, the UHD 620 is most suited for casual games like Team Fortress 2, Rocket League or Farming Simulator 17. See below for a list of modern games tested with various models.

Features

The revised video engine now supports H.265/HEVC Main10 profile in hardware with 10 bit colors. Furthermore, Googles VP9 codec can also be hardware decoded. The first models do not support HDCP 2.2 and therefore Netflix 4K. This was added with the new models in 2017 and beginning of May 2017 also the older CPU models like the i3-7100U are now shipped with a new S-Spec Code that supports HDCP 2.2. HDMI 2.0 however is still only supported with an external converter chip (LSPCon).

Power Consumption

The UHD Graphics 620 can be found in mobile processors specified at 15 W TDP and is therefore suited for compact laptops and ultrabooks. The power consumption during playing The Witcher 3 (with an external monitor) was comparable to a Intel HD Graphics 620 based laptop and on the lowest end of all of our measurements. Dedicated GPUs, like the GeForce 940MX, needed a lot more power.

Intel Iris Plus Graphics 655

► remove from comparison Intel Iris Plus Graphics 655

The Intel Iris Plus Graphics 655 (GT3e) is a processor graphics card announced in September 2017. As the successor to the Intel Iris Graphics 650 (Kaby Lake), the Iris Plus Graphics 655 is used for 28-Watt Coffee Lake-U models. The biggest difference is the doubled eDRAM-cache at 128 MB. There should not be any big changes compared to the Iris Graphics 650.

The so called GT3e version of the Kaby Lake GPU still has 48 Execution Units (EUs), which can reach up to 1200 MHz (previously 1100 MHz) depending on the model. Besides eDRAM cache, the Iris 655 can also access the system memory (2x 64 Bit DDR3L-2133/DDR4-2400) via processor interface.

Compared to the Iris Plus 640 from the 15-Watt models, the Iris 655 only has a slightly higher maximum clock as well as almost twice the TDP, which allows a better utilization of the Turbo Boost potential.

Performance

The exact performance of the Iris Plus Graphics 655 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 i7-8559U. 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 655 is used for 28-Watt processor and therefore small/medium-sized notebooks.

Intel UHD Graphics 620Intel Iris Plus Graphics 655
ManufacturerIntelIntel
Gen. 9.5 Series
Iris Plus Graphics 655 48 @ 0.3 - 1.2 GHz
Iris Plus Graphics 650 compare 48 @ 0.3 - 1.1 GHz64/128 Bit
Iris Plus Graphics 645 compare 48 @ 0.3 - 1.15 GHz
Iris Plus Graphics 640 compare 48 @ 0.3 - 1.05 GHz64/128 Bit
UHD Graphics 630 compare 24 @ 0.3 - 1.15 GHz64/128 Bit
UHD Graphics P630 compare 24 @ 0.3 - 1.2 GHz64/128 Bit
HD Graphics 630 compare 24 @ 0.3 - 1.15 GHz64/128 Bit
HD Graphics P630 compare 24 64/128 Bit
UHD Graphics 620 24 @ 0.3 - 1.15 GHz64/128 Bit
HD Graphics 620 compare 24 @ 0.3 - 1.05 GHz64/128 Bit
UHD Graphics 617 compare 24 @ 0.3 - 1.15 GHz64/128 Bit
UHD Graphics 615 compare 24 @ 0.3 - 1 GHz64/128 Bit
HD Graphics 615 compare 24 @ 0.3 - 1.05 GHz64/128 Bit
Iris Plus Graphics 655 48 @ 0.3 - 1.2 GHz
Iris Plus Graphics 650 compare 48 @ 0.3 - 1.1 GHz64/128 Bit
Iris Plus Graphics 645 compare 48 @ 0.3 - 1.15 GHz
Iris Plus Graphics 640 compare 48 @ 0.3 - 1.05 GHz64/128 Bit
UHD Graphics 630 compare 24 @ 0.3 - 1.15 GHz64/128 Bit
UHD Graphics P630 compare 24 @ 0.3 - 1.2 GHz64/128 Bit
HD Graphics 630 compare 24 @ 0.3 - 1.15 GHz64/128 Bit
HD Graphics P630 compare 24 64/128 Bit
UHD Graphics 620 24 @ 0.3 - 1.15 GHz64/128 Bit
HD Graphics 620 compare 24 @ 0.3 - 1.05 GHz64/128 Bit
UHD Graphics 617 compare 24 @ 0.3 - 1.15 GHz64/128 Bit
UHD Graphics 615 compare 24 @ 0.3 - 1 GHz64/128 Bit
HD Graphics 615 compare 24 @ 0.3 - 1.05 GHz64/128 Bit
CodenameKaby-Lake-Refresh GT2Kaby Lake GT3e
ArchitectureGen. 9.5Gen. 9.5 Kaby Lake
Pipelines24 - unified48 - unified
Core Speed300? - 1150 (Boost) MHz300 - 1200 (Boost) MHz
Memory Bus Width64/128 Bit
Memory TypeDDR3/DDR4DDR3/DDR4
Shared Memoryyesyes
DirectXDirectX 12_1DirectX 12_1
technology14 nm14 nm
FeaturesQuickSyncQuickSync
Date of Announcement01.09.2017 01.09.2017
CPU in UHD Graphics 620GPU Base SpeedGPU Boost / Turbo
Intel Core i7-10810U6 x 1100 MHz, 15 W300 MHz? MHz
Intel Core i7-10710U6 x 1100 MHz, 15 W300 MHz1150 MHz
Intel Core i7-10610U4 x 1800 MHz, 15 W300 MHz1150 MHz
min. - max.300 MHz900 - 1150 MHz
CPU in Iris Plus Graphics 655GPU Base SpeedGPU Boost / Turbo
Intel Core i7-8559U4 x 2700 MHz, 28 W300 MHz1200 MHz
Intel Core i5-8269U4 x 2600 MHz, 28 W300 MHz1100 MHz
Intel Core i5-8279U4 x 2400 MHz, 28 W300 MHz1150 MHz
min. - max.300 MHz900 - 1200 MHz

Benchmarks

Performance Rating - 3DMark 11 + Fire Strike + Time Spy - UHD Graphics 620
6.5 pt (7%)
Performance Rating - 3DMark 11 + Fire Strike + Time Spy - Iris Plus Graphics 655
10.7 pt (11%)
3DMark - 3DMark Time Spy Score
min: 343     avg: 439     median: 435.5 (2%)     max: 708 Points
min: 348     avg: 632     median: 676 (4%)     max: 722 Points
3DMark - 3DMark Time Spy Graphics
min: 299     avg: 384     median: 379.5 (2%)     max: 760 Points
min: 301     avg: 556     median: 601 (3%)     max: 633 Points
3DMark - 3DMark Ice Storm Unlimited Graphics
min: 60554     avg: 88527     median: 88725 (14%)     max: 115515 Points
min: 134073     avg: 143400     median: 143400 (22%)     max: 152727 Points
3DMark - 3DMark Ice Storm Extreme Graphics
min: 26409     avg: 43034     median: 42660 (6%)     max: 59483 Points
3DMark - 3DMark Cloud Gate Score
min: 5358     avg: 8157     median: 8139 (11%)     max: 10960 Points
min: 6769     avg: 10880     median: 11517 (15%)     max: 13037 Points
3DMark - 3DMark Cloud Gate Graphics
min: 6205     avg: 9224     median: 9312 (5%)     max: 11437 Points
min: 6498     avg: 13601     median: 14713.5 (7%)     max: 16698 Points
3DMark - 3DMark Fire Strike Standard Score
min: 538     avg: 1056     median: 1071 (3%)     max: 1313 Points
min: 852     avg: 1672     median: 1838.5 (5%)     max: 2040 Points
3DMark - 3DMark Fire Strike Standard Graphics
min: 557     avg: 1153     median: 1164 (2%)     max: 1444 Points
min: 920     avg: 1806     median: 1959 (4%)     max: 2260 Points
3DMark - 3DMark Ice Storm Graphics
min: 13790     avg: 68085     median: 67512 (9%)     max: 102010 Points
min: 108565     avg: 110303     median: 110302 (15%)     max: 112040 Points
3DMark - 3DMark Sling Shot (ES 3.0) Unlimited
7727 Points (46%)
3DMark - 3DMark Sling Shot (ES 3.0) Unlimited Graphics
8007 Points (19%)
3DMark - 3DMark Sling Shot Extreme (ES 3.1) Unlimited
min: 5204     avg: 5377     median: 5376.5 (55%)     max: 5549 Points
3DMark - 3DMark Sling Shot Extreme (ES 3.1) Unlimited Graphics
min: 4856     avg: 5023     median: 5023 (20%)     max: 5190 Points
3DMark - 3DMark Night Raid
min: 3967     avg: 5202     median: 5245 (8%)     max: 6637 Points
3DMark - 3DMark Night Raid Graphics Score
min: 4163     avg: 5221     median: 5312 (3%)     max: 6380 Points
3DMark 11 - 3DM11 Performance Score
min: 1175     avg: 1925     median: 1935 (5%)     max: 2283 Points
min: 1548     avg: 2849     median: 3181 (7%)     max: 3349 Points
3DMark 11 - 3DM11 Performance GPU
min: 1144     avg: 1741     median: 1744 (3%)     max: 2006 Points
min: 1365     avg: 2614     median: 2947 (5%)     max: 3081 Points
3DMark Vantage
3DM Vant. Perf. total + Intel UHD Graphics 620
3DMark Vantage - 3DM Vant. Perf. total
7761 Points (8%)