AMD Radeon HD 7770 GHz Edition vs AMD Radeon HD 6990M
What is the difference between AMD Radeon HD 7770 GHz Edition and AMD Radeon HD 6990M. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Cape Verde | GPU Name | Blackcomb |
| Cape Verde XT | Model number | Blackcomb XTX (216-0811030) |
| GCN 1.0 | Architecture | TeraScale 2 |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 40 nm |
| 1,500 million | Transistors | 1,700 million |
| 123 mm² | Die Size | 212 mm² |
Graphics Card
| Feb 15th, 2012 | Release Date | Jul 12th, 2011 |
| Southern Islands (HD 7700) | Family | Vancouver (HD 6900M) |
| End-of-life | Production | End-of-life |
| Northern Islands | Predecessor | Manhattan |
| PCIe 3.0 x16 | Bus Interface | MXM-B (3.0) |
Memory
| 1024 MB | Memory Size | 2 GB |
| GDDR5 | Memory Type | GDDR5 |
| 128 bit | Memory Bus | 256 bit |
| 72.00 GB/s | Bandwidth | 115.2 GB/s |
Performance
| 16.00 GPixel/s | Pixel fillrate | 22.88 GPixel/s |
| 40.00 GTexel/s | Texture fillrate | 40.04 GTexel/s |
| 1,280 GFLOPS | FP32 (float) performance | 1.602 TFLOPS |
Clock Speeds
| 1125 MHz 4.5 Gbps effective | Memory Clock | 900 MHz 3.6 Gbps effective |
| 1000 MHz | GPU Clock | 715 MHz |
Render Config
| 640 | Shading Units | 1120 |
| 40 | TMUs | 56 |
| 16 | ROPs | 32 |
| 10 | Compute Units | 14 |
| 16 KB (per CU) | L1 Cache | 8 KB (per CU) |
| 256 KB | L2 Cache | 512 KB |
Board Design
| Dual-slot | Slot Width | MXM Module |
| 80 W | Thermal design power (TDP) | 100 W |
| 1x DVI 1x HDMI 2x mini-DisplayPort | Display Connectors | No outputs |
| 1x 6-pin | Power Connectors | None |
| C441, C468 | Board Number | C296 |
API support
| 12 (11_1) | DirectX | 11.2 (11_0) |
| 4.6 | OpenGL | 4.4 |
| 1.2 | OpenCL | 1.2 |
| 1.2 | Vulkan | N/A |
| 5.1 | Shader Model | 5.0 |