AMD Radeon HD 8870 OEM vs AMD Radeon RX 560X
What is the difference between AMD Radeon HD 8870 OEM and AMD Radeon RX 560X. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Pitcairn | GPU Name | Polaris 21 |
| Pitcairn XT (215-0828047) | Model number | Polaris 21 XT (215-0908004) |
| GCN 1.0 | Architecture | GCN 4.0 |
| TSMC | Foundry | GlobalFoundries |
| 28 nm | Process Size | 14 nm |
| 2,800 million | Transistors | 3,000 million |
| 212 mm² | Die Size | 123 mm² |
Graphics Card
| Jan 8th, 2013 | Release Date | Apr 11th, 2018 |
| Sea Islands (HD 8800) | Family | Polaris (RX 500X) |
| End-of-life | Production | Active |
| Southern Islands | Predecessor | Polaris |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x8 |
Memory
| 2 GB | Memory Size | 4 GB |
| GDDR5 | Memory Type | GDDR5 |
| 256 bit | Memory Bus | 128 bit |
| 153.6 GB/s | Bandwidth | 112.0 GB/s |
Performance
| 32.00 GPixel/s | Pixel fillrate | 20.40 GPixel/s |
| 80.00 GTexel/s | Texture fillrate | 81.60 GTexel/s |
| 2.560 TFLOPS | FP32 (float) performance | 2.611 TFLOPS |
| 160.0 GFLOPS (1:16) | FP64 (double) performance | 163.2 GFLOPS (1:16) |
Clock Speeds
| 1200 MHz 4.8 Gbps effective | Memory Clock | 1750 MHz 7 Gbps effective |
Render Config
| 1280 | Shading Units | 1024 |
| 80 | TMUs | 64 |
| 32 | ROPs | 16 |
| 20 | Compute Units | 16 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 512 KB | L2 Cache | 1024 KB |
Board Design
| Dual-slot | Slot Width | Dual-slot |
| 241 mm 9.5 inches | Length | 170 mm 6.7 inches |
| 175 W | Thermal design power (TDP) | 75 W |
| 450 W | Suggested PSU | 250 W |
| 1x DVI 1x HDMI 2x mini-DisplayPort | Display Connectors | 1x DVI 1x HDMI 1x DisplayPort |
| 2x 6-pin | Power Connectors | None |
| C401 | Board Number | C994 |
API support
| 12 (11_1) | DirectX | 12 (12_0) |
| 4.6 | OpenGL | 4.6 |
| 1.2 | OpenCL | 2.1 |
| 1.2 | Vulkan | 1.2 |
| 5.1 | Shader Model | 6.4 |