Product Compare
AMD Radeon HD 6870 1600SP Edition vs AMD Radeon RX 455 OEM
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Jan 2013 | Jun 2016 |
| Generation | Northern Islands | Arctic Islands |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Memory Clock | 1050 MHz | 1625 MHz |
| Memory | ||
| Memory Size | 1024MB | 2GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 256bit | 128bit |
| Bandwidth | 134.4GB/s | 104.0GB/s |
| Render Config | ||
| Compute Units | 20 | 12 |
| Shading Units | 1600 | 768 |
| TMUs | 80 | 48 |
| ROPs | 32 | 16 |
| L1 Cache | 8 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 512 KB | 256 KB |
| Theoretical Performance | ||
| Pixel Rate | 27.20 GPixel/s | 16.80 GPixel/s |
| Texture Rate | 68.00 GTexel/s | 50.40 GTexel/s |
| FP32 (float) | 2.720 TFLOPS | 1.613 TFLOPS |
| FP64 (double) | 544.0 GFLOPS | 100.8 GFLOPS |
| Graphics Processor | ||
| GPU Name | Cypress | Tobago |
| GPU Variant | Cypress XT(215-0735033) | Tobago PRO(215-0875010) |
| Architecture | TeraScale 2 | GCN 2.0 |
| Foundry | TSMC | TSMC |
| Process Size | 40 nm | 28 nm |
| Transistors | 2.154 billion | 2.08 billion |
| Die Size | 334 mm² | 160 mm² |
| Board Design | ||
| TDP | 175W | 100W |
| Suggested PSU | 450 W | 300 W |
| Outputs | 2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1 | 1x DVI1x HDMI 1.4a1x DisplayPort 1.2 |
| Power Connectors | 2x 6-pin | 1x 6-pin |
| 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 |