NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA Switch GPU 20nm
Graphics Processor
| GPU model | GF116 | GM20B |
|---|---|---|
| GPU variant | GF116-150-A1 | ODNX02-A2 |
| Architecture | Fermi 2.0 | Maxwell 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 20 nm |
| Number of transistors | 1,170 million | 2,000 million |
| Die size | 238 mm² | 118 mm² |
Graphics Card
| Release date | Apr 24th, 2012 | Mar 17th, 2017 |
|---|---|---|
| Generation | GeForce 600 | Console GPU |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | IGP |
| Predecessor | GeForce 500 | — |
| Successor | GeForce 700 | — |
| Launch price | — | 299 USD |
Clocks
| GPU clock | 720 MHz | — |
|---|---|---|
| Shader clock | 1440 MHz | — |
| Memory clock | 800 MHz 1600 Mbps effective | 1600 MHz 3.2 Gbps effective |
| Base clock | — | 384 MHz |
| Boost clock | — | 768 MHz |
Memory Configuration
| Memory size | 1536 MB | 4 GB |
|---|---|---|
| Memory type | DDR3 | DDR4 |
| Memory bus width | 192 bit | 64 bit |
| Bandwidth | 38.40 GB/s | 25.60 GB/s |
Render Configuration
| Shading units | 144 | 256 |
|---|---|---|
| TMUs | 24 | 16 |
| ROPs | 24 | 16 |
| SM count | 3 | — |
| Cache L1 | 64 KB (per SM) | — |
| Cache L2 | 384 KB | — |
| SMM count | — | 2 |
Performance
| Pixel rate | 4.320 GPixel/s | 12.29 GPixel/s |
|---|---|---|
| Texture rate | 17.28 GTexel/s | 12.29 GTexel/s |
| FP32 (float) performance | 414.7 GFLOPS | 393.2 GFLOPS |
| FP64 (double) performance | 34.56 GFLOPS (1:12) | 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 | 75 W | 15 W |
| Suggested PSU | 250 W | 350 W |
| Outputs | 2x DVI1x mini-HDMI | No outputs |
| Power connectors | None | None |
| Board number | P1062 | 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 | 1.1 | 1.2 |
| Vulkan | — | 1.1 |
| CUDA | 2.1 | 5.3 |
| Shader model | 5.1 | 6.4 |
