AMD Radeon HD 7770 GHz Edition vs NVIDIA GeForce GTX 645 OEM
What is the difference between AMD Radeon HD 7770 GHz Edition and NVIDIA GeForce GTX 645 OEM. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Cape Verde | GPU Name | GK106 |
| Cape Verde XT | Model number | GK106-200-A1 |
| GCN 1.0 | Architecture | Kepler |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 1,500 million | Transistors | 2,540 million |
| 123 mm² | Die Size | 221 mm² |
Graphics Card
| Feb 15th, 2012 | Release Date | Apr 22nd, 2013 |
| Southern Islands (HD 7700) | Family | GeForce 600 |
| End-of-life | Production | End-of-life |
| Northern Islands | Predecessor | GeForce 500 |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 1024 MB | Memory Size | 1024 MB |
| GDDR5 | Memory Type | GDDR5 |
| 128 bit | Memory Bus | 128 bit |
| 72.00 GB/s | Bandwidth | 64.00 GB/s |
Performance
| 16.00 GPixel/s | Pixel fillrate | 9.888 GPixel/s |
| 40.00 GTexel/s | Texture fillrate | 39.55 GTexel/s |
| 1,280 GFLOPS | FP32 (float) performance | 949.2 GFLOPS |
| 80.00 GFLOPS (1:16) | FP64 (double) performance | 39.55 GFLOPS (1:24) |
Clock Speeds
| 1125 MHz 4.5 Gbps effective | Memory Clock | 1000 MHz 4 Gbps effective |
| 1000 MHz | GPU Clock | 824 MHz |
Render Config
| 640 | Shading Units | 576 |
| 40 | TMUs | 48 |
| 16 | ROPs | 16 |
| 16 KB (per CU) | L1 Cache | 16 KB (per SMX) |
| 256 KB | L2 Cache | 256 KB |
Board Design
| Dual-slot | Slot Width | Single-slot |
| 210 mm 8.3 inches | Length | 147 mm 5.8 inches |
| 80 W | Thermal design power (TDP) | 65 W |
| 250 W | Suggested PSU | 250 W |
| 1x DVI 1x HDMI 2x mini-DisplayPort | Display Connectors | 1x DVI 1x HDMI 1x DisplayPort |
| 1x 6-pin | Power Connectors | None |
| C441, C468 | Board Number | P2010 SKU 20 |
API support
| 12 (11_1) | DirectX | 12 (11_0) |
| 4.6 | OpenGL | 4.6 |
| 1.2 | OpenCL | 3.0 |
| 1.2 | Vulkan | 1.1 |
| 5.1 | Shader Model | 5.1 |