Product Compare
AMD Radeon HD 7870 GHz Edition vs AMD Radeon R9 390
AMDGPU
AMDGPU
Specifications
Specs Compare| AMD Radeon HD 7870 GHz Edition | AMD Radeon R9 390 | |
|---|---|---|
| Graphics Card | ||
| Release Date | Mar 2012 | Jun 2015 |
| Generation | Southern Islands | Pirate Islands |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Memory Clock | 1200 MHz | 1500 MHz |
| Memory | ||
| Memory Size | 2GB | 8GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 256bit | 512bit |
| Bandwidth | 153.6GB/s | 384.0GB/s |
| Render Config | ||
| Compute Units | 20 | 40 |
| Shading Units | 1280 | 2560 |
| TMUs | 80 | 160 |
| ROPs | 32 | 64 |
| L1 Cache | 16 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 512 KB | 1024 KB |
| Theoretical Performance | ||
| Pixel Rate | 32.00 GPixel/s | 64.00 GPixel/s |
| Texture Rate | 80.00 GTexel/s | 160.0 GTexel/s |
| FP32 (float) | 2.560 TFLOPS | 5.120 TFLOPS |
| FP64 (double) | 160.0 GFLOPS | 640.0 GFLOPS |
| Graphics Processor | ||
| GPU Name | Pitcairn | Grenada |
| GPU Variant | Pitcairn XT(215-0828047) | Grenada PRO(215-0880030) |
| Architecture | GCN 1.0 | GCN 2.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 2.8 billion | 6.2 billion |
| Die Size | 212 mm² | 438 mm² |
| Board Design | ||
| TDP | 175W | 275W |
| Suggested PSU | 450 W | 600 W |
| Outputs | 1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 |
| Power Connectors | 2x 6-pin | 1x 6-pin + 1x 8-pin |
| Graphics Features | ||
| DirectX | 12 (11_1) | 12 (12_0) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | 1.2 | 1.2 |
| Shader Model | 5.1 | 6.3 |