AMD FireStream 9270 vs AMD Radeon HD 7850M
Graphics Processor
| GPU model | RV770 | Heathrow |
|---|---|---|
| GPU variant | RV770 XT | Heathrow PRO |
| Architecture | TeraScale | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 28 nm |
| Number of transistors | 956 million | 1,500 million |
| Die size | 256 mm² | 123 mm² |
Graphics Card
| Release date | Nov 13th, 2008 | — |
|---|---|---|
| Generation | FireStream | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
Clocks
| GPU clock | 750 MHz | 675 MHz |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | 1000 MHz 4 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 115.2 GB/s | 64.00 GB/s |
Render Configuration
| Shading units | 800 | 640 |
|---|---|---|
| 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 | 10.80 GPixel/s |
|---|---|---|
| Texture rate | 30.00 GTexel/s | 27.00 GTexel/s |
| FP32 (float) performance | 1,200 GFLOPS | 864.0 GFLOPS |
| FP64 (double) performance | 240.0 GFLOPS (1:5) | 54.00 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | Dual-slot | — |
|---|---|---|
| Length | 241 mm 9.5 inches | — |
| Width | 111 mm 4.4 inches | — |
| Height | 38 mm 1.5 inches | — |
| TDP | 160 W | 40 W |
| Suggested PSU | 450 W | — |
| Outputs | 1x DVI | No outputs |
| Power connectors | 2x 6-pin | — |
API Support & Features
| DirectX | 10.1 (10_1) | 12 (11_1) |
|---|---|---|
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | — | 1.2 |
| Shader model | 4.1 | 5.1 |
Other Features
Mobile graphics
| Release date | — | Apr 24th, 2012 |
|---|---|---|
| Generation | — | London (HD 7800M) |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | Vancouver |
| Successor | — | Solar System |
