AMD FireStream 9270 vs ATI Radeon HD 4870
Graphics Processor
| GPU model | RV770 | RV770 |
|---|---|---|
| GPU variant | RV770 XT | RV770 XT (215-0669049) |
| Architecture | TeraScale | TeraScale |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 55 nm |
| Number of transistors | 956 million | 956 million |
| Die size | 256 mm² | 256 mm² |
Graphics Card
| Release date | Nov 13th, 2008 | Jun 25th, 2008 |
|---|---|---|
| Generation | FireStream | Radeon R700 |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Launch price | — | 299 USD |
| Reviews | — | 135 in our database |
| Predecessor | — | Radeon R600 |
| Successor | — | Evergreen |
Clocks
| GPU clock | 750 MHz | 750 MHz |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | 900 MHz 3.6 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 512 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 115.2 GB/s | 115.2 GB/s |
Render Configuration
| Shading units | 800 | 800 |
|---|---|---|
| TMUs | 40 | 40 |
| ROPs | 16 | 16 |
| Compute units | 10 | 10 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 12.00 GPixel/s | 12.00 GPixel/s |
|---|---|---|
| Texture rate | 30.00 GTexel/s | 30.00 GTexel/s |
| FP32 (float) performance | 1,200 GFLOPS | 1,200 GFLOPS |
| FP64 (double) performance | 240.0 GFLOPS (1:5) | 240.0 GFLOPS (1:5) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | 241 mm 9.5 inches |
| Width | 111 mm 4.4 inches | 111 mm 4.4 inches |
| Height | 38 mm 1.5 inches | 40 mm 1.6 inches |
| TDP | 160 W | 150 W |
| Suggested PSU | 450 W | 450 W |
| Outputs | 1x DVI | 2x DVI1x S-Video |
| Power connectors | 2x 6-pin | 2x 6-pin |
| Board number | — | B507-31 |
API Support & Features
| DirectX | 10.1 (10_1) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 3.3 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 4.1 |
