AMD Radeon R9 255 OEM vs ATI Radeon X1650 XT Dual
Graphics Processor
| GPU model | Cape Verde | RV560 |
|---|---|---|
| GPU variant | Cape Verde PRX | RV560 XT (215PAGAKA12FG) |
| Architecture | GCN 1.0 | R500 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 80 nm |
| Number of transistors | 1,500 million | 330 million |
| Die size | 123 mm² | 230 mm² |
Graphics Card
| Release date | Dec 21st, 2013 | Oct 30th, 2006 |
|---|---|---|
| Generation | Volcanic Islands | Radeon R500 PCIe |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | PCIe 1.0 x16 |
| Predecessor | Sea Islands | Radeon R400 PCIe |
| Successor | Pirate Islands | Radeon R600 |
| Reviews | — | 49 in our database |
Clocks
| Base clock | 900 MHz | — |
|---|---|---|
| Boost clock | 930 MHz | — |
| Memory clock | 1150 MHz 4.6 Gbps effective | 700 MHz 1400 Mbps effective |
| GPU clock | — | 525 MHz |
Memory Configuration
| Memory size | 2 GB | 256 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 73.60 GB/s | 22.40 GB/s |
Render Configuration
| Shading units | 512 | — |
|---|---|---|
| TMUs | 32 | 8 |
| ROPs | 16 | 8 |
| Compute units | 8 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | — |
| Pixel shaders | — | 24 |
| Vertex shaders | — | 8 |
Performance
| Pixel rate | 14.88 GPixel/s | 4.200 GPixel/s |
|---|---|---|
| Texture rate | 29.76 GTexel/s | 4.200 GTexel/s |
| FP32 (float) performance | 952.3 GFLOPS | — |
| FP64 (double) performance | 59.52 GFLOPS (1:16) | — |
| Vertex rate | — | 1.050 GVertices/s |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| TDP | 65 W | unknown |
| Suggested PSU | 250 W | 200 W |
| Outputs | No outputs | 2x DVI |
| Power connectors | 1x 6-pin | 1x 6-pin |
| Board number | C750 | — |
API Support & Features
| DirectX | 12 (11_1) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 4.6 | 2.1 |
| OpenCL | 1.2 | — |
| Vulkan | 1.2 | — |
| Shader model | 5.1 | 3.0 |
