ATI Radeon HD 3870 vs ATI Radeon X1950 PRO DUAL
Graphics Processor
| GPU model | RV670 | RV570 |
|---|---|---|
| GPU variant | RV670 XT (215-0708005) | RV570 XT (215PADAKA12FG) |
| Architecture | TeraScale | R500 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 80 nm |
| Number of transistors | 666 million | 330 million |
| Die size | 192 mm² | 230 mm² |
Graphics Card
| Release date | Nov 19th, 2007 | Jan 10th, 2007 |
|---|---|---|
| Generation | Radeon R600 | Radeon R500 PCIe |
| Production | End-of-life | End-of-life |
| Launch price | 269 USD | 349 USD |
| Interface | PCIe 2.0 x16 | PCIe 1.0 x16 |
| Reviews | 80 in our database | 144 in our database |
| Predecessor | Radeon R500 PCIe | Radeon R400 PCIe |
| Successor | Radeon R700 | Radeon R600 |
Clocks
| GPU clock | 777 MHz | 575 MHz |
|---|---|---|
| Memory clock | 1126 MHz 2.3 Gbps effective | 690 MHz 1380 Mbps effective |
Memory Configuration
| Memory size | 512 MB | 512 MB |
|---|---|---|
| Memory type | GDDR4 | GDDR3 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 72.06 GB/s | 44.16 GB/s |
Render Configuration
| Shading units | 320 | — |
|---|---|---|
| TMUs | 16 | 12 |
| ROPs | 16 | 12 |
| Compute units | 4 | — |
| Cache L2 | 256 KB | — |
| Pixel shaders | — | 36 |
| Vertex shaders | — | 8 |
Performance
| Pixel rate | 12.43 GPixel/s | 6.900 GPixel/s |
|---|---|---|
| Texture rate | 12.43 GTexel/s | 6.900 GTexel/s |
| FP32 (float) performance | 497.3 GFLOPS | — |
| FP64 (double) performance | 99.46 GFLOPS (1:5) | — |
| Vertex rate | — | 1.150 GVertices/s |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | 300 mm 11.8 inches |
| TDP | 106 W | 130 W |
| Suggested PSU | 300 W | 300 W |
| Outputs | 2x DVI1x S-Video | 2x DVI1x S-Video |
| Power connectors | 1x 6-pin | 1x 6-pin |
| Board number | B339 | — |
API Support & Features
| DirectX | 10.1 (10_1) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 3.3 (full) 4.0 (partial) | 2.1 (full) 3.0 (partial) |
| OpenCL | — | — |
| Vulkan | — | — |
| Shader model | 4.1 | 3.0 |
