Product Compare
AMD Radeon HD 6870 X2 vs AMD Radeon R9 M395X Mac Edition
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Jul 2011 | May 2015 |
| Generation | Northern Islands | Crystal System |
| Type | Desktop | Mobile |
| Bus Interface | PCIe 2.0 x16 | MXM-B (3.0) |
| Clock Speeds | ||
| Memory Clock | 1050 MHz | 1365 MHz |
| Memory | ||
| Memory Size | 1024MB | 4GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 256bit | 256bit |
| Bandwidth | 134.4GB/s | 174.7GB/s |
| Render Config | ||
| Compute Units | 14 | 32 |
| Shading Units | 1120 | 2048 |
| TMUs | 56 | 128 |
| ROPs | 32 | 32 |
| L1 Cache | 8 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 512 KB | 512 KB |
| Theoretical Performance | ||
| Pixel Rate | 28.80 GPixel/s | 29.09 GPixel/s |
| Texture Rate | 50.40 GTexel/s | 116.4 GTexel/s |
| FP32 (float) | 2.016 TFLOPS | 3.723 TFLOPS |
| FP16 (half) | 3.723 TFLOPS | |
| FP64 (double) | 232.7 GFLOPS | |
| Graphics Processor | ||
| GPU Name | Barts | Amethyst |
| GPU Variant | Barts XT(215-0798000) | Amethyst XT |
| Architecture | TeraScale 2 | GCN 3.0 |
| Foundry | TSMC | TSMC |
| Process Size | 40 nm | 28 nm |
| Transistors | 1.7 billion | 5 billion |
| Die Size | 255 mm² | 366 mm² |
| Board Design | ||
| TDP | 300W | 250W |
| Suggested PSU | 700 W | |
| Outputs | 2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1 | No outputs |
| Power Connectors | None | |
| Graphics Features | ||
| DirectX | 11.2 (11_0) | 12 (12_0) |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | N/A | 1.2 |
| Shader Model | 5.0 | 6.3 |