AMD Radeon HD 8770 OEM vs AMD Radeon R9 M390 Mac Edition
What is the difference between AMD Radeon HD 8770 OEM and AMD Radeon R9 M390 Mac Edition. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Bonaire | GPU Name | Pitcairn |
| Bonaire XT (215-0839039) | 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
| Sep 2nd, 2013 | Release Date | May 5th, 2015 |
| Sea Islands (HD 8700) | Family | Crystal System (R9 M300) |
| End-of-life | Production | End-of-life |
| Southern Islands | Predecessor | Solar System |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 1024 MB | Memory Size | 2 GB |
| GDDR5 | Memory Type | GDDR5 |
| 128 bit | Memory Bus | 256 bit |
| 96.00 GB/s | Bandwidth | 174.7 GB/s |
Performance
| 16.80 GPixel/s | Pixel fillrate | 30.66 GPixel/s |
| 58.80 GTexel/s | Texture fillrate | 61.31 GTexel/s |
| 1.882 TFLOPS | FP32 (float) performance | 1.962 TFLOPS |
| 117.6 GFLOPS (1:16) | FP64 (double) performance | 122.6 GFLOPS (1:16) |
Clock Speeds
| 1500 MHz 6 Gbps effective | Memory Clock | 1365 MHz 5.5 Gbps effective |
| 1050 MHz | GPU Clock | 958 MHz |
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
| Dual-slot | Slot Width | MXM Module |
| 85 W | Thermal design power (TDP) | 80 W |
| 1x DVI 1x HDMI 2x mini-DisplayPort | Display Connectors | No outputs |
| 1x 6-pin | Power Connectors | None |
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 |