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Intel Iris Plus Graphics 655

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.

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 compare 24 @ 0.3 - 1.15 GHz
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 GT3e
ArchitectureGen. 9.5 Kaby Lake
Pipelines48 - unified
Core Speed300 - 1200 (Boost) MHz
Memory TypeDDR3/DDR4
Shared Memoryyes
APIDirectX 12_1, OpenGL 4.5
technology14 nm
FeaturesQuickSync
Date of Announcement01.09.2017
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 MHz1050 - 1200 MHz

Benchmarks

Performance Rating - 3DMark 11 + Fire Strike + Time Spy
0.9 pt (3%)
3DMark - 3DMark Time Spy Score
min: 348     avg: 647     median: 684 (2%)     max: 722 Points
3DMark - 3DMark Time Spy Graphics
min: 301     avg: 570     median: 604.5 (2%)     max: 633 Points
3DMark - 3DMark Cloud Gate Score
min: 6769     avg: 10798     median: 11622 (12%)     max: 13037 Points
3DMark - 3DMark Cloud Gate Graphics
min: 6498     avg: 13736     median: 14343 (4%)     max: 16698 Points
3DMark - 3DMark Fire Strike Standard Score
min: 852     avg: 1703     median: 1850 (3%)     max: 2040 Points
3DMark - 3DMark Fire Strike Standard Graphics
min: 920     avg: 1836     median: 1983 (2%)     max: 2260 Points
3DMark 11 - 3DM11 Performance Score
min: 1548     avg: 2942     median: 3180.5 (4%)     max: 3349 Points
3DMark 11 - 3DM11 Performance GPU
min: 1365     avg: 2707     median: 2894 (2%)     max: 3081 Points
3DMark Vantage
3DM Vant. Perf. total +
3DM Vant. Perf. GPU no PhysX +
3DMark 06 3DMark 06 - Standard 1280x1024 +
3DMark 06
min: 17176     avg: 17885     median: 17885 (24%)     max: 18594 Points
SPECviewperf 12
specvp12 sw-03 +
specvp12 snx-02 +
specvp12 showcase-01 +
specvp12 mediacal-01 +
specvp12 maya-04 +
specvp12 energy-01 +
specvp12 creo-01 +
specvp12 catia-04 +
specvp12 3dsmax-05 +
SPECviewperf 13 specvp13 sw-04 +
specvp13 snx-03 +
specvp13 showcase-02 +
specvp13 medical-02 +
specvp13 maya-05 +
specvp13 energy-02 +
specvp13 creo-02 +
specvp13 catia-05 +
specvp13 3dsmax-06 +
SPECviewperf 2020 v1 specvp2020 solidworks-05 4k +
specvp2020 snx-04 4k +
specvp2020 medical-03 4k +
specvp2020 maya-06 4k +
specvp2020 energy-03 4k +
specvp2020 creo-03 4k +
specvp2020 catia-06 4k +
specvp2020 3dsmax-07 4k +
Cinebench R10 Cinebench R10 Shading (32bit) +
Cinebench R11.5 Cinebench R11.5 OpenGL 64 Bit +
Cinebench R15
Cinebench R15 OpenGL 64 Bit +
Cinebench R15 - Cinebench R15 OpenGL 64 Bit
min: 33.91     avg: 67     median: 74 (4%)     max: 88 fps
Cinebench R15 OpenGL Ref. Match 64 Bit +
Cinebench R15 - Cinebench R15 OpenGL Ref. Match 64 Bit
min: 97.8     avg: 98.1     median: 97.8 (98%)     max: 99.3 %
GFXBench 3.1 - GFXBench Manhattan ES 3.1 Offscreen
min: 43.1     avg: 2387     median: 2387.1 (50%)     max: 4731 fps
GFXBench (DX / GLBenchmark) 2.7
GFXBench T-Rex HD Offscreen C24Z16 +
GFXBench (DX / GLBenchmark) 2.7 - GFXBench T-Rex HD Offscreen C24Z16
min: 199.6     avg: 6375     median: 6375.3 (51%)     max: 12551 fps
Power Consumption - Furmark Stress Test Power Consumption - external Monitor *
min: 28.9     avg: 37.4     median: 39.2 (6%)     max: 42.4 Watt
0510152025303540455055Tooltip
Power Consumption - The Witcher 3 Power Consumption - external Monitor *
min: 35.3     avg: 40.6     median: 39.4 (6%)     max: 47.2 Watt
05101520253035404550Tooltip