Intel Iris Graphics 6100 vs Intel Iris Plus Graphics 645
Intel Iris Graphics 6100
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The Intel Iris Graphics 6100 (GT3) is an integrated Broadwell graphics card revealed in Q1 2015. It can be found in several low-voltage SoCs (28 W TDP) such as the Core i5-5257U or i7-5557U. While Core i5 and Core i7 chips feature 48 EUs, the Core i3 version offers just 47 EUs. Depending on the specific CPU, the maximum GPU frequency varies between 1000 and 1100 MHz.
Architecture and Features
Broadwell features a GPU based on the Intel Gen8 architecture, which has been optimized in various aspects compared to the previous Gen7.5 (Haswell). Inter alia, the shader arrays called "subslice" have been reorganized and now offer 8 Execution Units (EUs) each. Three subslices form a "slice" for a total of 24 EUs. Combined with other improvements such as larger L1 caches and an optimized frontend, the integrated GPU has become faster and more efficient than its predecessor.
The Iris Graphics 6100 represents the top-end version of the Broadwell GPU family and consists of two slices with 48 EUs. Beyond that, there is also a low-end (GT1, 12 EUs), a mid-range (GT2, 24 EUs) and a high-end variant (GT3e, 48 EUs + eDRAM).
All Broadwell GPUs support OpenCL 2.0 and DirectX 12 (FL 11_1). The video engine can now decode H.265 using both fixed function hardware as well as available GPU shaders. Up to three displays can be connected via DP 1.2/eDP 1.3 (max. 3840 x 2160 @ 60 Hz) or HDMI 1.4a (max. 3840 x 2160 @ 24 Hz). HDMI 2.0, however, is not supported.
Performance
Depending on the specific CPU, the maximum GPU frequency varies between 1000 and 1100 MHz. Even though the Iris Graphics 6100 is technically identical to the HD Graphics 6000, the higher TDP (28 W instead of 15 W) leads to a better utilization of the Turbo Boost and therefore a superior performance. Overall, the Iris 6100 is about as fast as a dedicated GeForce 820M and outperforms the former Iris Graphics 5100 by 20 - 25 percent.
Older and less demanding games such as Diablo III, Counter-Strike: GO oder Dota 2 can be played fluently in 1366 x 768 pixels and high settings. More demanding titles, however, may require lower settings or won't run at a decent framerate at all.
Power Consumption
Utilizing a new 14 nm process, the Broadwell LV chips are specified at 28 W TDP and therefore suited for medium-sized ultrabooks. The TDP is flexible and can be further reduced (23 W), which has a significant impact on performance.
Intel Iris Plus Graphics 645
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The 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 Graphics 6100 | Intel Iris Plus Graphics 645 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Gen. 9.5 Series |
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| Codename | Broadwell GT3 | Kaby Lake GT3e | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Architecture | Gen. 8 Broadwell | Gen. 9.5 Coffee Lake | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Pipelines | 48 - unified | 48 - unified | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Core Speed | 300 - 1100 (Boost) MHz | 300 - 1150 (Boost) MHz | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Memory Bus Width | 64/128 Bit | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shared Memory | yes | yes | |||||||||||||||||||||||||||||||||||||||||||||||||||
| API | DirectX 12 (FL 11_1), OpenGL 4.3 | DirectX 12_1, OpenGL 4.5 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Power Consumption | 28 Watt | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Transistors | 1.9 Billion | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| technology | 14 nm | 14 nm | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Features | QuickSync | QuickSync | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Date of Announcement | 05.01.2015 | 10.07.2019 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Memory Type | DDR3, DDR4 |
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Benchmarks
3DM Vant. Perf. total + Intel Iris Graphics 6100
specvp12 sw-03 + Intel Iris Graphics 6100
Cinebench R15 OpenGL 64 Bit + Intel Iris Graphics 6100
GFXBench T-Rex HD Offscreen C24Z16 + Intel Iris Graphics 6100
Average Benchmarks Intel Iris Graphics 6100 → 100% n=10
Average Benchmarks Intel Iris Plus Graphics 645 → 176% n=10
- 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
Team Fortress 2
2017
Rocket League
2017
Farming Simulator 17
2016
Overwatch
2016
The Division
2016
Rainbow Six Siege
2015
Just Cause 3
2015
Anno 2205
2015
FIFA 16
2015
World of Warships
2015
Metal Gear Solid V
2015
Mad Max
2015
Dota 2 Reborn
2015
The Witcher 3
2015
Dirt Rally
2015
GTA V
2015
Battlefield Hardline
2015
Evolve
2015
F1 2014
2014
The Evil Within
2014
Ryse: Son of Rome
2014
Alien: Isolation
2014
Fifa 15
2014
Sims 4
2014
Risen 3: Titan Lords
2014
GRID: Autosport
2014
Thief
2014
Battlefield 4
2013
Dota 2
2013
Company of Heroes 2
2013
Metro: Last Light
2013
BioShock Infinite
2013
Tomb Raider
2013
Crysis 3
2013
Counter-Strike: GO
2012
Diablo III
2012
Anno 2070
2011
Average Gaming Intel Iris Graphics 6100 → 100%
Average Gaming 30-70 fps → 100%
Average Gaming Intel Iris Plus Graphics 645 → 190%
Average Gaming 30-70 fps → 189%
For more games that might be playable and a list of all games and graphics cards visit our Gaming List
