ATI Radeon HD 4570 Rebrand vs ATI Radeon X1800 CrossFire Edition
Graphics Processor
| GPU model | RV635 | R520 |
|---|---|---|
| GPU variant | RV635 PRO (215-0682008) | R520 CE (215RFFBKA15FG) |
| Architecture | TeraScale | R500 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 90 nm |
| Number of transistors | 378 million | 321 million |
| Die size | 135 mm² | 288 mm² |
Graphics Card
| Release date | Nov 22nd, 2009 | Dec 20th, 2005 |
|---|---|---|
| Generation | Radeon R700 | Radeon R500 PCIe |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 1.0 x16 |
| Predecessor | Radeon R600 | Radeon R400 PCIe |
| Successor | Evergreen | Radeon R600 |
| Reviews | — | 76 in our database |
Clocks
| GPU clock | 796 MHz | 600 MHz |
|---|---|---|
| Memory clock | 396 MHz 792 Mbps effective | 700 MHz 1400 Mbps effective |
Memory Configuration
| Memory size | 1024 MB | 512 MB |
|---|---|---|
| Memory type | DDR2 | GDDR3 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 12.67 GB/s | 44.80 GB/s |
Render Configuration
| Shading units | 120 | — |
|---|---|---|
| TMUs | 8 | 16 |
| ROPs | 4 | 16 |
| Compute units | 3 | — |
| Cache L2 | 128 KB | — |
| Pixel shaders | — | 16 |
| Vertex shaders | — | 8 |
Performance
| Pixel rate | 3.184 GPixel/s | 9.600 GPixel/s |
|---|---|---|
| Texture rate | 6.368 GTexel/s | 9.600 GTexel/s |
| FP32 (float) performance | 191.0 GFLOPS | — |
| Vertex rate | — | 1.200 GVertices/s |
Dimensions & Outputs
| Slot width | Single-slot | Dual-slot |
|---|---|---|
| Length | 190 mm 7.5 inches | — |
| TDP | 65 W | 113 W |
| Suggested PSU | 250 W | 300 W |
| Outputs | 2x DVI1x S-Video | 2x DVI1x S-Video |
| Power connectors | — | 1x 6-pin |
| Board number | — | A721 |
API Support & Features
| DirectX | 10.1 (10_1) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 3.3 | 2.1 |
| OpenCL | — | — |
| Vulkan | — | — |
| Shader model | 4.1 | 3.0 |
