Product Compare
AMD Radeon HD 8870 OEM vs AMD Radeon Sky 700
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Jan 2013 | Mar 2013 |
| Generation | Sea Islands | Radeon Sky |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Memory Clock | 1200 MHz | 1375 MHz |
| Memory | ||
| Memory Size | 2GB | 6GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 256bit | 384bit |
| Bandwidth | 153.6GB/s | 264.0GB/s |
| Render Config | ||
| Compute Units | 20 | 28 |
| Shading Units | 1280 | 1792 |
| TMUs | 80 | 112 |
| ROPs | 32 | 32 |
| L1 Cache | 16 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 512 KB | 768 KB |
| Theoretical Performance | ||
| Pixel Rate | 32.00 GPixel/s | 28.80 GPixel/s |
| Texture Rate | 80.00 GTexel/s | 100.8 GTexel/s |
| FP32 (float) | 2.560 TFLOPS | 3.226 TFLOPS |
| FP64 (double) | 160.0 GFLOPS | 806.4 GFLOPS |
| Graphics Processor | ||
| GPU Name | Pitcairn | Tahiti |
| GPU Variant | Pitcairn XT(215-0828047) | Tahiti PRO GL |
| Architecture | GCN 1.0 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 2.8 billion | 4.313 billion |
| Die Size | 212 mm² | 352 mm² |
| Board Design | ||
| TDP | 175W | 225W |
| Suggested PSU | 450 W | 550 W |
| Outputs | 1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 | 1x DisplayPort 1.2 |
| Power Connectors | 2x 6-pin | 1x 8-pin |
| Graphics Features | ||
| DirectX | 12 (11_1) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader Model | 5.1 | 5.1 |