NVIDIA GeForce GT 640M LE vs NVIDIA GeForce GTX 285M
Graphics Processor
| GPU model | GF108 | G92 |
|---|---|---|
| Architecture | Fermi | Tesla |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 65 nm |
| Number of transistors | 585 million | 754 million |
| Die size | 116 mm² | 324 mm² |
| GPU variant | — | N10E-GTX1-B1 |
Mobile graphics
| Release date | May 4th, 2012 | Feb 1st, 2010 |
|---|---|---|
| Generation | GeForce 600M | GeForce 200M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | MXM-B (3.0) |
| Reviews | 2 in our database | — |
| Predecessor | GeForce 500M | GeForce 100M |
| Successor | GeForce 700M | GeForce 300M |
Clocks
| GPU clock | 753 MHz | 600 MHz |
|---|---|---|
| Shader clock | 1505 MHz | 1500 MHz |
| Memory clock | 785 MHz 3.1 Gbps effective | 1000 MHz 2 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 50.24 GB/s | 64.00 GB/s |
Render Configuration
| Shading units | 96 | 128 |
|---|---|---|
| TMUs | 16 | 64 |
| ROPs | 4 | 16 |
| SM count | 2 | 16 |
| Cache L1 | 64 KB (per SM) | — |
| Cache L2 | 256 KB | 64 KB |
Performance
| Pixel rate | 3.012 GPixel/s | 9.600 GPixel/s |
|---|---|---|
| Texture rate | 12.05 GTexel/s | 38.40 GTexel/s |
| FP32 (float) performance | 289.0 GFLOPS | 384.0 GFLOPS |
| FP64 (double) performance | 24.08 GFLOPS (1:12) | — |
Dimensions & Outputs
| TDP | 32 W | 75 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | MXM Module |
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 | 1.1 |
| Shader model | 5.1 | 4.0 |
