AMD Radeon Pro 555X vs Intel Iris Plus Graphics 645
AMD Radeon Pro 555X
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The AMD Radeon Pro 555X is a mobile graphics card based on the small Polaris 21 chip from AMD. It is available in the 15-inch Apple MacBook Pro (Mid 2018 model with Coffee Lake) and is the performance is similar to the old Radeon Pro 455 / 555. The difference is the slightly higher clock rate of 907 MHz versus 855 MHz (+6%) and the bigger graphics memory (4 GB versus 2 GB GDDR5). The Polaris 21 chip is produced in a 14nm FinFET process and is the smaller Polaris chip.
Both the performance and the power consumption are roughly on par with the Nvidia GeForce MX150 (laptop version of the GT 1030), which is also equipped with 2 GB GDDR5-VRAM.
More information about the Polaris architecture is available in our dedicated article. More benchmarks including gaming tests are listed on the dedicated page for the similarly powerful Radeon Pro 555 / Radeon Pro 455.
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.
| AMD Radeon Pro 555X | Intel Iris Plus Graphics 645 | |||||||||||||||||||||||||||||||||||||||||||||||||
| Gen. 9.5 Series |
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| Codename | Polaris 21 | Kaby Lake GT3e | ||||||||||||||||||||||||||||||||||||||||||||||||
| Architecture | Polaris | Gen. 9.5 Coffee Lake | ||||||||||||||||||||||||||||||||||||||||||||||||
| Pipelines | 768 - unified | 48 - unified | ||||||||||||||||||||||||||||||||||||||||||||||||
| Core Speed | 855 MHz | 300 - 1150 (Boost) MHz | ||||||||||||||||||||||||||||||||||||||||||||||||
| Memory Speed | 5080 MHz | |||||||||||||||||||||||||||||||||||||||||||||||||
| Memory Bus Width | 128 Bit | |||||||||||||||||||||||||||||||||||||||||||||||||
| Memory Type | GDDR5 | DDR3, DDR4 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Max. Amount of Memory | 4 GB | |||||||||||||||||||||||||||||||||||||||||||||||||
| Shared Memory | no | yes | ||||||||||||||||||||||||||||||||||||||||||||||||
| API | DirectX 12, OpenGL Vulkan | DirectX 12_1, OpenGL 4.5 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Power Consumption | <35 Watt | |||||||||||||||||||||||||||||||||||||||||||||||||
| Transistors | 3 Billion | |||||||||||||||||||||||||||||||||||||||||||||||||
| technology | 14 nm | 14 nm | ||||||||||||||||||||||||||||||||||||||||||||||||
| Features | DisplayPort 1.3 HBR / 1.4 HDR Ready, HDMI 2.0, AMD FreeSync | QuickSync | ||||||||||||||||||||||||||||||||||||||||||||||||
| Notebook Size | large | |||||||||||||||||||||||||||||||||||||||||||||||||
| Date of Announcement | 05.06.2017 | 10.07.2019 |
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Benchmarks
Cinebench R15 OpenGL 64 Bit + Intel Iris Plus Graphics 645
GFXBench T-Rex HD Offscreen C24Z16 + Intel Iris Plus Graphics 645
Average Benchmarks Intel Iris Plus Graphics 645 → 0% n=0
- 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
Dota 2 Reborn
2015
BioShock Infinite
2013| AMD Radeon Pro 555X | 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 | 76.5 | 57.3 | 29 | 26.9 | ||||||||||
| BioShock Infinite | 104.6 | 60 | 51.6 | 22.1 | ||||||||||
| AMD Radeon Pro 555X | 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 | | | | | | | < 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
