NVIDIA GeForce GT 645 OEM vs NVIDIA GeForce GTX 460 X2
Graphics Processor
| GPU model | GF114 | GF104 |
|---|---|---|
| Architecture | Fermi 2.0 | Fermi |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 1,950 million | 1,950 million |
| Die size | 332 mm² | 332 mm² |
| GPU variant | — | GF104-300-KB-A1 |
Graphics Card
| Release date | Apr 24th, 2012 | Mar 11th, 2011 |
|---|---|---|
| Generation | GeForce 600 | GeForce 400 |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Predecessor | GeForce 500 | GeForce 200 |
| Successor | GeForce 700 | GeForce 500 |
| Reviews | — | 154 in our database |
Clocks
| GPU clock | 776 MHz | 701 MHz |
|---|---|---|
| Shader clock | 1552 MHz | 1401 MHz |
| Memory clock | 957 MHz 3.8 Gbps effective | 900 MHz 3.6 Gbps effective |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 192 bit | 256 bit |
| Bandwidth | 91.87 GB/s | 115.2 GB/s |
Render Configuration
| Shading units | 288 | 336 |
|---|---|---|
| TMUs | 48 | 56 |
| ROPs | 24 | 32 |
| SM count | 6 | 7 |
| Cache L1 | 64 KB (per SM) | 64 KB (per SM) |
| Cache L2 | 384 KB | 512 KB |
Performance
| Pixel rate | 9.312 GPixel/s | 9.814 GPixel/s |
|---|---|---|
| Texture rate | 37.25 GTexel/s | 39.26 GTexel/s |
| FP32 (float) performance | 894.0 GFLOPS | 941.5 GFLOPS |
| FP64 (double) performance | 74.50 GFLOPS (1:12) | 78.46 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 210 mm 8.3 inches | 292 mm 11.5 inches |
| TDP | 102 W | 160 W |
| Suggested PSU | 300 W | 450 W |
| Outputs | 2x DVI1x mini-HDMI | 3x DVI1x mini-HDMI |
| Power connectors | — | 2x 8-pin |
| Board number | — | P1041 |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| CUDA | 2.1 | 2.1 |
| Shader model | 5.1 | 5.1 |
