NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 745A
Graphics Processor
| GPU model | GK107 | GK107 |
|---|---|---|
| GPU variant | GK107-300-A2 | N14P-LP |
| Architecture | Kepler | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,270 million | 1,270 million |
| Die size | 118 mm² | 118 mm² |
Graphics Card
| Release date | Jun 5th, 2012 | — |
|---|---|---|
| Generation | GeForce 600 | — |
| Production | End-of-life | — |
| Launch price | 99 USD | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | GeForce 500 | — |
| Successor | GeForce 700 | — |
Clocks
| GPU clock | 902 MHz | — |
|---|---|---|
| Memory clock | 891 MHz 1782 Mbps effective | 900 MHz 1800 Mbps effective |
| Base clock | — | 837 MHz |
| Boost clock | — | 915 MHz |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | DDR3 | DDR3 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 28.51 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 384 | 384 |
|---|---|---|
| TMUs | 32 | 32 |
| ROPs | 16 | 16 |
| SMX count | 2 | 2 |
| Cache L1 | 16 KB (per SMX) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 7.216 GPixel/s | 7.320 GPixel/s |
|---|---|---|
| Texture rate | 28.86 GTexel/s | 29.28 GTexel/s |
| FP32 (float) performance | 692.7 GFLOPS | 702.7 GFLOPS |
| FP64 (double) performance | 28.86 GFLOPS (1:24) | 29.28 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Single-slot | MXM Module |
|---|---|---|
| Length | 145 mm 5.7 inches | — |
| TDP | 65 W | 33 W |
| Suggested PSU | 250 W | — |
| Outputs | 1x DVI1x HDMI1x DisplayPort | No outputs |
| Power connectors | None | — |
| Board number | P2011 | — |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.1 |
| CUDA | 3.0 | 3.0 |
| Shader model | 5.1 | 5.1 |
Other Features
Mobile graphics
| Release date | — | Aug 26th, 2013 |
|---|---|---|
| Generation | — | GeForce 700A |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 600A |
| Successor | — | GeForce 800A |
