Product Compare
AMD Radeon HD 7970 X2 vs AMD Radeon HD 6850
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Aug 2012 | Oct 2010 |
| Generation | Southern Islands | Northern Islands |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 2.0 x16 |
| Clock Speeds | ||
| Memory Clock | 1375 MHz | 1000 MHz |
| Memory | ||
| Memory Size | 3GB | 1024MB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 384bit | 256bit |
| Bandwidth | 264.0GB/s | 128.0GB/s |
| Render Config | ||
| Compute Units | 32 | 12 |
| Shading Units | 2048 | 960 |
| TMUs | 128 | 48 |
| ROPs | 32 | 32 |
| L1 Cache | 16 KB (per CU) | 8 KB (per CU) |
| L2 Cache | 768 KB | 512 KB |
| Theoretical Performance | ||
| Pixel Rate | 29.60 GPixel/s | 24.80 GPixel/s |
| Texture Rate | 118.4 GTexel/s | 37.20 GTexel/s |
| FP32 (float) | 3.789 TFLOPS | 1488 GFLOPS |
| FP64 (double) | 947.2 GFLOPS | |
| Graphics Processor | ||
| GPU Name | New Zealand | Barts |
| Architecture | GCN 1.0 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 40 nm |
| Transistors | 4.313 billion | 1.7 billion |
| Die Size | 352 mm² | 255 mm² |
| GPU Variant | Barts PRO(215-0798006) | |
| Board Design | ||
| TDP | 500W | 127W |
| Suggested PSU | 900 W | 300 W |
| Outputs | 2x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 | 2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1 |
| Power Connectors | 3x 8-pin | 1x 6-pin |
| Graphics Features | ||
| DirectX | 12 (11_1) | 11.2 (11_0) |
| OpenGL | 4.6 | 4.4 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.2 | N/A |
| Shader Model | 5.1 | 5.0 |