Product Compare
AMD Radeon R9 M385 vs AMD Radeon HD 8870 OEM
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | May 2015 | Jan 2013 |
| Generation | Gem System | Sea Islands |
| Type | Mobile | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Base Clock | 900 MHz | |
| Boost Clock | 1000 MHz | |
| Memory Clock | 1200 MHz | 1200 MHz |
| Memory | ||
| Memory Size | 4GB | 2GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 128bit | 256bit |
| Bandwidth | 76.80GB/s | 153.6GB/s |
| Render Config | ||
| Compute Units | 14 | 20 |
| Shading Units | 896 | 1280 |
| TMUs | 56 | 80 |
| ROPs | 16 | 32 |
| L1 Cache | 16 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 256 KB | 512 KB |
| Theoretical Performance | ||
| Pixel Rate | 16.00 GPixel/s | 32.00 GPixel/s |
| Texture Rate | 56.00 GTexel/s | 80.00 GTexel/s |
| FP32 (float) | 1.792 TFLOPS | 2.560 TFLOPS |
| FP64 (double) | 112.0 GFLOPS | 160.0 GFLOPS |
| Graphics Processor | ||
| GPU Name | Strato | Pitcairn |
| GPU Variant | Strato XT | Pitcairn XT(215-0828047) |
| Architecture | GCN 2.0 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 2.08 billion | 2.8 billion |
| Die Size | 160 mm² | 212 mm² |
| Board Design | ||
| TDP | Unknown | 175W |
| Outputs | Portable Device Dependent | 1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 |
| Suggested PSU | 450 W | |
| Power Connectors | 2x 6-pin | |
| Graphics Features | ||
| DirectX | 12 (12_0) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 1.2 |
| Vulkan | 1.2.170 | 1.2 |
| Shader Model | 6.5 | 5.1 |