NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce GTX 295
Graphics Processor
| GPU model | GF116 | GT200B |
|---|---|---|
| GPU variant | GF116-150-A1 | G200-401-B3 |
| Architecture | Fermi 2.0 | Tesla 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 55 nm |
| Number of transistors | 1,170 million | 1,400 million |
| Die size | 238 mm² | 470 mm² |
Graphics Card
| Release date | Apr 24th, 2012 | Jan 8th, 2009 |
|---|---|---|
| Generation | GeForce 600 | GeForce 200 |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Predecessor | GeForce 500 | GeForce 9 |
| Successor | GeForce 700 | GeForce 400 |
| Launch price | — | 500 USD |
| Reviews | — | 74 in our database |
Clocks
| GPU clock | 720 MHz | 576 MHz |
|---|---|---|
| Shader clock | 1440 MHz | 1242 MHz |
| Memory clock | 800 MHz 1600 Mbps effective | 999 MHz 1998 Mbps effective |
Memory Configuration
| Memory size | 1536 MB | 896 MB |
|---|---|---|
| Memory type | DDR3 | GDDR3 |
| Memory bus width | 192 bit | 448 bit |
| Bandwidth | 38.40 GB/s | 111.9 GB/s |
Render Configuration
| Shading units | 144 | 240 |
|---|---|---|
| TMUs | 24 | 80 |
| ROPs | 24 | 28 |
| SM count | 3 | 30 |
| Cache L1 | 64 KB (per SM) | — |
| Cache L2 | 384 KB | 224 KB |
Performance
| Pixel rate | 4.320 GPixel/s | 16.13 GPixel/s |
|---|---|---|
| Texture rate | 17.28 GTexel/s | 46.08 GTexel/s |
| FP32 (float) performance | 414.7 GFLOPS | 596.2 GFLOPS |
| FP64 (double) performance | 34.56 GFLOPS (1:12) | 74.52 GFLOPS (1:8) |
Dimensions & Outputs
| Slot width | Single-slot | Dual-slot |
|---|---|---|
| Length | 145 mm 5.7 inches | 267 mm 10.5 inches |
| TDP | 75 W | 289 W |
| Suggested PSU | 250 W | 600 W |
| Outputs | 2x DVI1x mini-HDMI | 2x DVI1x HDMI |
| Power connectors | None | 1x 6-pin + 1x 8-pin |
| Board number | P1062 | P657 |
| Width | — | 111 mm 4.4 inches |
| Height | — | 38 mm 1.5 inches |
API Support & Features
| DirectX | 12 (11_0) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| CUDA | 2.1 | 1.3 |
| Shader model | 5.1 | 4.0 |
