Product Compare
AMD Radeon HD 8870 OEM vs AMD Radeon RX 7900 GRE
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Jan 2013 | Jul 2023 |
| Generation | Sea Islands | Navi III |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 4.0 x16 |
| Clock Speeds | ||
| Memory Clock | 1200 MHz | 2250 MHz |
| Base Clock | 1287 MHz | |
| Boost Clock | 2245 MHz | |
| Memory | ||
| Memory Size | 2GB | 16GB |
| Memory Type | GDDR5 | GDDR6 |
| Memory Bus | 256bit | 256bit |
| Bandwidth | 153.6GB/s | 576.0GB/s |
| Render Config | ||
| Compute Units | 20 | 80 |
| Shading Units | 1280 | 5120 |
| TMUs | 80 | 320 |
| ROPs | 32 | 160 |
| L1 Cache | 16 KB (per CU) | 256 KB per Array |
| L2 Cache | 512 KB | 6 MB |
| RT Cores | 80 | |
| L3 Cache | 64 MB | |
| Theoretical Performance | ||
| Pixel Rate | 32.00 GPixel/s | 359.2 GPixel/s |
| Texture Rate | 80.00 GTexel/s | 718.4 GTexel/s |
| FP32 (float) | 2.560 TFLOPS | 45.98 TFLOPS |
| FP64 (double) | 160.0 GFLOPS | 1436.8 GFLOPS |
| FP16 (half) | 91.96 TFLOPS | |
| Graphics Processor | ||
| GPU Name | Pitcairn | Navi 31 |
| GPU Variant | Pitcairn XT(215-0828047) | Navi 31 XL(215-145000206) |
| Architecture | GCN 1.0 | RDNA 3.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 5 nm |
| Transistors | 2.8 billion | 57.7 billion |
| Die Size | 212 mm² | 529 mm² |
| Board Design | ||
| TDP | 175W | 260W |
| Suggested PSU | 450 W | 600 W |
| Outputs | 1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 | 1x HDMI 2.1a2x DisplayPort 2.11x USB Type-C |
| Power Connectors | 2x 6-pin | 2x 8-pin |
| Graphics Features | ||
| DirectX | 12 (11_1) | 12 Ultimate (12_2) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.2 |
| Vulkan | 1.2 | 1.3 |
| Shader Model | 5.1 | 6.8 |