AMD Radeon Pro 555 vs AMD Radeon HD 6990M
What is the difference between AMD Radeon Pro 555 and AMD Radeon HD 6990M. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Polaris 21 | GPU Name | Blackcomb |
| Polaris 21 PRO | Model number | Blackcomb XTX (216-0811030) |
| GCN 4.0 | Architecture | TeraScale 2 |
| GlobalFoundries | Foundry | TSMC |
| 14 nm | Process Size | 40 nm |
| 3,000 million | Transistors | 1,700 million |
| 123 mm² | Die Size | 212 mm² |
Graphics Card
| Jun 5th, 2017 | Release Date | Jul 12th, 2011 |
| Radeon Pro Mac (500 Series) | Family | Vancouver (HD 6900M) |
| Active | Production | End-of-life |
| PCIe 3.0 x8 | Bus Interface | MXM-B (3.0) |
Memory
| 2 GB | Memory Size | 2 GB |
| GDDR5 | Memory Type | GDDR5 |
| 128 bit | Memory Bus | 256 bit |
| 81.60 GB/s | Bandwidth | 115.2 GB/s |
Performance
| 13.60 GPixel/s | Pixel fillrate | 22.88 GPixel/s |
| 40.80 GTexel/s | Texture fillrate | 40.04 GTexel/s |
| 1,306 GFLOPS | FP32 (float) performance | 1.602 TFLOPS |
Clock Speeds
| 1275 MHz 5.1 Gbps effective | Memory Clock | 900 MHz 3.6 Gbps effective |
| 850 MHz | GPU Clock | 715 MHz |
Render Config
| 768 | Shading Units | 1120 |
| 48 | TMUs | 56 |
| 16 | ROPs | 32 |
| 12 | Compute Units | 14 |
| 16 KB (per CU) | L1 Cache | 8 KB (per CU) |
| 1024 KB | L2 Cache | 512 KB |
Board Design
| IGP | Slot Width | MXM Module |
| 75 W | Thermal design power (TDP) | 100 W |
| No outputs | Display Connectors | No outputs |
| None | Power Connectors | None |
API support
| 12 (12_0) | DirectX | 11.2 (11_0) |
| 4.6 | OpenGL | 4.4 |
| 2.1 | OpenCL | 1.2 |
| 1.2 | Vulkan | N/A |
| 6.4 | Shader Model | 5.0 |