NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce GT 650M Mac Edition
Graphics Processor
| GPU model | GF116 | GK107 |
|---|---|---|
| GPU variant | GF116-150-A1 | N13P-GT-W-A2 |
| Architecture | Fermi 2.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 1,170 million | 1,270 million |
| Die size | 238 mm² | 118 mm² |
Graphics Card
| Release date | Apr 24th, 2012 | — |
|---|---|---|
| Generation | GeForce 600 | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Predecessor | GeForce 500 | — |
| Successor | GeForce 700 | — |
Clocks
| GPU clock | 720 MHz | 900 MHz |
|---|---|---|
| Shader clock | 1440 MHz | — |
| Memory clock | 800 MHz 1600 Mbps effective | 1254 MHz 5 Gbps effective |
Memory Configuration
| Memory size | 1536 MB | 512 MB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 192 bit | 128 bit |
| Bandwidth | 38.40 GB/s | 80.26 GB/s |
Render Configuration
| Shading units | 144 | 384 |
|---|---|---|
| TMUs | 24 | 32 |
| ROPs | 24 | 16 |
| SM count | 3 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 384 KB | 256 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 4.320 GPixel/s | 7.200 GPixel/s |
|---|---|---|
| Texture rate | 17.28 GTexel/s | 28.80 GTexel/s |
| FP32 (float) performance | 414.7 GFLOPS | 691.2 GFLOPS |
| FP64 (double) performance | 34.56 GFLOPS (1:12) | 28.80 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Single-slot | — |
|---|---|---|
| Length | 145 mm 5.7 inches | — |
| TDP | 75 W | 45 W |
| Suggested PSU | 250 W | — |
| Outputs | 2x DVI1x mini-HDMI | No outputs |
| Power connectors | None | — |
| Board number | P1062 | — |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | — | 1.1 |
| CUDA | 2.1 | 3.0 |
| Shader model | 5.1 | 5.1 |
Other Features
Mobile graphics
| Release date | — | Jul 12th, 2012 |
|---|---|---|
| Generation | — | GeForce 600M |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 500M |
| Successor | — | GeForce 700M |
