AMD Radeon R9 M385X vs AMD Radeon R9 M390 Mac Edition
What is the difference between AMD Radeon R9 M385X and AMD Radeon R9 M390 Mac Edition. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Strato | GPU Name | Pitcairn |
| Strato XT | Model number | Pitcairn PRO (215-0828062) |
| GCN 2.0 | Architecture | GCN 1.0 |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 2,080 million | Transistors | 2,800 million |
| 160 mm² | Die Size | 212 mm² |
Graphics Card
| May 5th, 2015 | Release Date | May 5th, 2015 |
| Crystal System (R9 M300) | Family | Crystal System (R9 M300) |
| Active | Production | End-of-life |
| Solar System | Predecessor | Solar System |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 4 GB | Memory Size | 2 GB |
| GDDR5 | Memory Type | GDDR5 |
| 128 bit | Memory Bus | 256 bit |
| 76.80 GB/s | Bandwidth | 174.7 GB/s |
Performance
| 17.60 GPixel/s | Pixel fillrate | 30.66 GPixel/s |
| 61.60 GTexel/s | Texture fillrate | 61.31 GTexel/s |
| 1.971 TFLOPS | FP32 (float) performance | 1.962 TFLOPS |
| 123.2 GFLOPS (1:16) | FP64 (double) performance | 122.6 GFLOPS (1:16) |
Clock Speeds
| 1200 MHz 4.8 Gbps effective | Memory Clock | 1365 MHz 5.5 Gbps effective |
Render Config
| 896 | Shading Units | 1024 |
| 56 | TMUs | 64 |
| 16 | ROPs | 32 |
| 14 | Compute Units | 16 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 256 KB | L2 Cache | 512 KB |
Board Design
| unknown | Thermal design power (TDP) | 80 W |
| No outputs | Display Connectors | No outputs |
API support
| 12 (12_0) | DirectX | 12 (11_1) |
| 4.6 | OpenGL | 4.6 |
| 2.0 | OpenCL | 1.2 |
| 1.2 | Vulkan | 1.2 |
| 6.3 | Shader Model | 5.1 |