NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA Switch GPU 20nm
Graphics Processor
| GPU model | GK208 | GM20B |
|---|---|---|
| GPU variant | GK208-400-A1 | ODNX02-A2 |
| Architecture | Kepler 2.0 | Maxwell 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 20 nm |
| Number of transistors | 1,020 million | 2,000 million |
| Die size | 87 mm² | 118 mm² |
Graphics Card
| Release date | May 29th, 2013 | Mar 17th, 2017 |
|---|---|---|
| Generation | GeForce 600 | Console GPU |
| Production | End-of-life | End-of-life |
| Launch price | 89 USD | 299 USD |
| Interface | PCIe 2.0 x8 | IGP |
| Predecessor | GeForce 500 | — |
| Successor | GeForce 700 | — |
Clocks
| GPU clock | 1046 MHz | — |
|---|---|---|
| Memory clock | 1252 MHz 5 Gbps effective | 1600 MHz 3.2 Gbps effective |
| Base clock | — | 384 MHz |
| Boost clock | — | 768 MHz |
Memory Configuration
| Memory size | 1024 MB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | DDR4 |
| Memory bus width | 64 bit | 64 bit |
| Bandwidth | 40.06 GB/s | 25.60 GB/s |
Render Configuration
| Shading units | 384 | 256 |
|---|---|---|
| TMUs | 32 | 16 |
| ROPs | 8 | 16 |
| SMX count | 2 | — |
| Cache L1 | 16 KB (per SMX) | — |
| Cache L2 | 512 KB | — |
| SMM count | — | 2 |
Performance
| Pixel rate | 8.368 GPixel/s | 12.29 GPixel/s |
|---|---|---|
| Texture rate | 33.47 GTexel/s | 12.29 GTexel/s |
| FP32 (float) performance | 803.3 GFLOPS | 393.2 GFLOPS |
| FP64 (double) performance | 33.47 GFLOPS (1:24) | 12.29 GFLOPS (1:32) |
| FP16 (half) performance | — | 786.4 GFLOPS (2:1) |
Dimensions & Outputs
| Slot width | Single-slot | IGP |
|---|---|---|
| Length | 145 mm 5.7 inches | 239 mm 9.4 inches |
| TDP | 49 W | 15 W |
| Suggested PSU | 200 W | 350 W |
| Outputs | 1x DVI1x HDMI1x VGA | No outputs |
| Power connectors | None | None |
| Board number | P2131 | HAC-001 |
| Width | — | 101 mm 4 inches |
| Height | — | 28 mm 1.1 inches |
| Weight | — | 0.4 kg (0.88 lbs) |
API Support & Features
| DirectX | 12 (11_0) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 1.2 |
| Vulkan | 1.1 | 1.1 |
| CUDA | 3.5 | 5.3 |
| Shader model | 5.1 | 6.4 |
