NVIDIA GeForce 8800 Ultra vs NVIDIA GeForce GTX 645 OEM
What is the difference between NVIDIA GeForce 8800 Ultra and NVIDIA GeForce GTX 645 OEM. Find out which graphics card has better performance.
Graphics Processor (GPU)
| G80 | GPU Name | GK106 |
| G80-450-A3 | Model number | GK106-200-A1 |
| Tesla | Architecture | Kepler |
| TSMC | Foundry | TSMC |
| 90 nm | Process Size | 28 nm |
| 681 million | Transistors | 2,540 million |
| 484 mm² | Die Size | 221 mm² |
Graphics Card
| May 2nd, 2007 | Release Date | Apr 22nd, 2013 |
| GeForce 8 (8800) | Family | GeForce 600 |
| End-of-life | Production | End-of-life |
| GeForce 7 PCIe | Predecessor | GeForce 500 |
| PCIe 1.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 768 MB | Memory Size | 1024 MB |
| GDDR3 | Memory Type | GDDR5 |
| 384 bit | Memory Bus | 128 bit |
| 103.7 GB/s | Bandwidth | 64.00 GB/s |
Performance
| 14.69 GPixel/s | Pixel fillrate | 9.888 GPixel/s |
| 39.17 GTexel/s | Texture fillrate | 39.55 GTexel/s |
| 387.1 GFLOPS | FP32 (float) performance | 949.2 GFLOPS |
Clock Speeds
| 1080 MHz 2.2 Gbps effective | Memory Clock | 1000 MHz 4 Gbps effective |
| 612 MHz | GPU Clock | 824 MHz |
Render Config
| 128 | Shading Units | 576 |
| 32 | TMUs | 48 |
| 24 | ROPs | 16 |
| 96 KB | L2 Cache | 256 KB |
Board Design
| Dual-slot | Slot Width | Single-slot |
| 270 mm 10.6 inches | Length | 147 mm 5.8 inches |
| 171 W | Thermal design power (TDP) | 65 W |
| 450 W | Suggested PSU | 250 W |
| 2x DVI 1x S-Video | Display Connectors | 1x DVI 1x HDMI 1x DisplayPort |
| 2x 6-pin | Power Connectors | None |
| P355 | Board Number | P2010 SKU 20 |
API support
| 11.1 (10_0) | DirectX | 12 (11_0) |
| 3.3 | OpenGL | 4.6 |
| 1.1 (1.0) | OpenCL | 3.0 |
| N/A | Vulkan | 1.1 |
| 4.0 | Shader Model | 5.1 |
| 1.0 | CUDA | 3.0 |