NVIDIA GeForce GT 745A vs NVIDIA GeForce GT 640
What is the difference between NVIDIA GeForce GT 745A and NVIDIA GeForce GT 640. Find out which graphics card has better performance.
Graphics Processor (GPU)
| GK107 | GPU Name | GK107 |
| N14P-LP | Model number | GK107-300-A2 |
| Kepler | Architecture | Kepler |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 1,270 million | Transistors | 1,270 million |
| 118 mm² | Die Size | 118 mm² |
Graphics Card
| Aug 26th, 2013 | Release Date | Jun 5th, 2012 |
| GeForce 700A | Family | GeForce 600 |
| End-of-life | Production | End-of-life |
| GeForce 600A | Predecessor | GeForce 500 |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 2 GB | Memory Size | 2 GB |
| DDR3 | Memory Type | DDR3 |
| 128 bit | Memory Bus | 128 bit |
| 28.80 GB/s | Bandwidth | 28.51 GB/s |
Performance
| 7.320 GPixel/s | Pixel fillrate | 7.216 GPixel/s |
| 29.28 GTexel/s | Texture fillrate | 28.86 GTexel/s |
| 702.7 GFLOPS | FP32 (float) performance | 692.7 GFLOPS |
| 29.28 GFLOPS (1:24) | FP64 (double) performance | 28.86 GFLOPS (1:24) |
Clock Speeds
| 900 MHz 1800 Mbps effective | Memory Clock | 891 MHz 1782 Mbps effective |
Render Config
| 384 | Shading Units | 384 |
| 32 | TMUs | 32 |
| 16 | ROPs | 16 |
| 16 KB (per SMX) | L1 Cache | 16 KB (per SMX) |
| 256 KB | L2 Cache | 256 KB |
Board Design
| MXM Module | Slot Width | Single-slot |
| 33 W | Thermal design power (TDP) | 65 W |
| No outputs | Display Connectors | 1x DVI 1x HDMI 1x DisplayPort |
API support
| 12 (11_0) | DirectX | 12 (11_0) |
| 4.6 | OpenGL | 4.6 |
| 3.0 | OpenCL | 3.0 |
| 1.1 | Vulkan | 1.1 |
| 5.1 | Shader Model | 5.1 |
| 3.0 | CUDA | 3.0 |