AMD Radeon Pro 555X vs AMD Radeon R7 265
Graphics Processor
| GPU model | Polaris 21 | Pitcairn |
|---|---|---|
| GPU variant | Polaris 21 PRO | Pitcairn PRO (215-0828062) |
| Architecture | GCN 4.0 | GCN 1.0 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 28 nm |
| Number of transistors | 3,000 million | 2,800 million |
| Die size | 123 mm² | 212 mm² |
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 | 1400 MHz 5.6 Gbps effective |
| Base clock | — | 900 MHz |
| Boost clock | — | 925 MHz |
Memory Configuration
| Memory size | 4 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 94.08 GB/s | 179.2 GB/s |
Render Configuration
| Shading units | 768 | 1024 |
|---|---|---|
| TMUs | 48 | 64 |
| ROPs | 16 | 32 |
| Compute units | 12 | 16 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 1024 KB | 512 KB |
Performance
| Pixel rate | 14.51 GPixel/s | 29.60 GPixel/s |
|---|---|---|
| Texture rate | 43.54 GTexel/s | 59.20 GTexel/s |
| FP16 (half) performance | 1,393 GFLOPS (1:1) | — |
| FP32 (float) performance | 1,393 GFLOPS | 1.894 TFLOPS |
| FP64 (double) performance | 87.07 GFLOPS (1:16) | 118.4 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | IGP | Dual-slot |
|---|---|---|
| TDP | 75 W | 150 W |
| Outputs | No outputs | 2x DVI1x HDMI1x DisplayPort |
| Power connectors | None | 1x 6-pin |
| Length | — | 210 mm 8.3 inches |
| Suggested PSU | — | 450 W |
| Board number | — | C630 |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.4 | 5.1 |
Other Features
Graphics Card
| Release date | — | Feb 13th, 2014 |
|---|---|---|
| Generation | — | Volcanic Islands |
| Production | — | End-of-life |
| Launch price | — | 149 USD |
| Interface | — | PCIe 3.0 x16 |
| Reviews | — | 12 in our database |
| Predecessor | — | Sea Islands |
| Successor | — | Pirate Islands |
