AMD Radeon Pro 555 vs AMD Radeon RX 455 OEM
Graphics Processor
| GPU model | Polaris 21 | Tobago |
|---|---|---|
| GPU variant | Polaris 21 PRO | Tobago PRO (215-0875010) |
| Architecture | GCN 4.0 | GCN 2.0 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 28 nm |
| Number of transistors | 3,000 million | 2,080 million |
| Die size | 123 mm² | 160 mm² |
Mobile graphics
| Release date | Jun 5th, 2017 | — |
|---|---|---|
| Generation | Radeon Pro Mac (500 Series) | — |
| Production | Active | — |
| Interface | PCIe 3.0 x8 | — |
Clocks
| GPU clock | 850 MHz | 1050 MHz |
|---|---|---|
| Memory clock | 1275 MHz 5.1 Gbps effective | 1625 MHz 6.5 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 81.60 GB/s | 104.0 GB/s |
Render Configuration
| Shading units | 768 | 768 |
|---|---|---|
| TMUs | 48 | 48 |
| ROPs | 16 | 16 |
| Compute units | 12 | 12 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 1024 KB | 256 KB |
Performance
| Pixel rate | 13.60 GPixel/s | 16.80 GPixel/s |
|---|---|---|
| Texture rate | 40.80 GTexel/s | 50.40 GTexel/s |
| FP16 (half) performance | 1,306 GFLOPS (1:1) | — |
| FP32 (float) performance | 1,306 GFLOPS | 1.613 TFLOPS |
| FP64 (double) performance | 81.60 GFLOPS (1:16) | 100.8 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | IGP | Single-slot |
|---|---|---|
| TDP | 75 W | 100 W |
| Outputs | No outputs | 1x DVI1x HDMI1x DisplayPort |
| Power connectors | None | 1x 6-pin |
| Length | — | 165 mm 6.5 inches |
| Suggested PSU | — | 300 W |
| Board number | — | C582, C936 |
API Support & Features
| DirectX | 12 (12_0) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 2.0 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.4 | 6.3 |
Other Features
Graphics Card
| Release date | — | Jun 30th, 2016 |
|---|---|---|
| Generation | — | Arctic Islands |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | Pirate Islands |
| Successor | — | Polaris |
