AMD Radeon Pro 555X vs Intel Iris Plus Graphics 645
Graphics Processor
| GPU model | Polaris 21 | Coffee Lake GT3e |
|---|---|---|
| GPU variant | Polaris 21 PRO | — |
| Architecture | GCN 4.0 | Generation 9.5 |
| Foundry | GlobalFoundries | Intel |
| Manufacturing process | 14 nm | 14 nm+++ |
| Number of transistors | 3,000 million | unknown |
| Die size | 123 mm² | unknown |
Mobile graphics
| Release date | Jul 16th, 2018 | — |
|---|---|---|
| Generation | Radeon Pro Mac (500X Series) | — |
| Production | Active | — |
| Interface | PCIe 3.0 x8 | — |
Clocks
| GPU clock | 907 MHz | — |
|---|---|---|
| Memory clock | 1470 MHz 5.9 Gbps effective | System Shared |
| Base clock | — | 300 MHz |
| Boost clock | — | 1050 MHz |
Memory Configuration
| Memory size | 4 GB | System Shared |
|---|---|---|
| Memory type | GDDR5 | System Shared |
| Memory bus width | 128 bit | System Shared |
| Bandwidth | 94.08 GB/s | System Dependent |
Render Configuration
| Shading units | 768 | 384 |
|---|---|---|
| TMUs | 48 | 48 |
| ROPs | 16 | 6 |
| Compute units | 12 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 1024 KB | — |
| Execution units | — | 48 |
Performance
| Pixel rate | 14.51 GPixel/s | 6.300 GPixel/s |
|---|---|---|
| Texture rate | 43.54 GTexel/s | 50.40 GTexel/s |
| FP16 (half) performance | 1,393 GFLOPS (1:1) | 1.613 TFLOPS (2:1) |
| FP32 (float) performance | 1,393 GFLOPS | 806.4 GFLOPS |
| FP64 (double) performance | 87.07 GFLOPS (1:16) | 201.6 GFLOPS (1:4) |
Dimensions & Outputs
| Slot width | IGP | IGP |
|---|---|---|
| TDP | 75 W | 15 W |
| Outputs | No outputs | No outputs |
| Power connectors | None | — |
API Support & Features
| DirectX | 12 (12_0) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 3.0 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.4 | 6.4 |
Other Features
Integrated Graphics
| Release date | — | Oct 7th, 2019 |
|---|---|---|
| Generation | — | HD Graphics-M (Coffee Lake) |
| Production | — | Active |
| Interface | — | Ring Bus |
| Reviews | — | 1 in our database |
