ATI Radeon HD 4870 vs ATI Radeon X1650 XT Dual
Graphics Processor
| GPU model | RV770 | RV560 |
|---|---|---|
| GPU variant | RV770 XT (215-0669049) | RV560 XT (215PAGAKA12FG) |
| Architecture | TeraScale | R500 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 80 nm |
| Number of transistors | 956 million | 330 million |
| Die size | 256 mm² | 230 mm² |
Graphics Card
| Release date | Jun 25th, 2008 | Oct 30th, 2006 |
|---|---|---|
| Generation | Radeon R700 | Radeon R500 PCIe |
| Production | End-of-life | End-of-life |
| Launch price | 299 USD | — |
| Interface | PCIe 2.0 x16 | PCIe 1.0 x16 |
| Reviews | 135 in our database | 49 in our database |
| Predecessor | Radeon R600 | Radeon R400 PCIe |
| Successor | Evergreen | Radeon R600 |
Clocks
| GPU clock | 750 MHz | 525 MHz |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | 700 MHz 1400 Mbps effective |
Memory Configuration
| Memory size | 512 MB | 256 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 115.2 GB/s | 22.40 GB/s |
Render Configuration
| Shading units | 800 | — |
|---|---|---|
| TMUs | 40 | 8 |
| ROPs | 16 | 8 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | — |
| Pixel shaders | — | 24 |
| Vertex shaders | — | 8 |
Performance
| Pixel rate | 12.00 GPixel/s | 4.200 GPixel/s |
|---|---|---|
| Texture rate | 30.00 GTexel/s | 4.200 GTexel/s |
| FP32 (float) performance | 1,200 GFLOPS | — |
| FP64 (double) performance | 240.0 GFLOPS (1:5) | — |
| Vertex rate | — | 1.050 GVertices/s |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | — |
| Width | 111 mm 4.4 inches | — |
| Height | 40 mm 1.6 inches | — |
| TDP | 150 W | unknown |
| Suggested PSU | 450 W | 200 W |
| Outputs | 2x DVI1x S-Video | 2x DVI |
| Power connectors | 2x 6-pin | 1x 6-pin |
| Board number | B507-31 | — |
API Support & Features
| DirectX | 10.1 (10_1) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 3.3 | 2.1 |
| OpenCL | 1.1 | — |
| Vulkan | — | — |
| Shader model | 4.1 | 3.0 |
