NVIDIA GeForce GT 640M LE vs NVIDIA GeForce GT 740A
Graphics Processor
| GPU model | GF108 | GK208 |
|---|---|---|
| Architecture | Fermi | Kepler 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 585 million | 1,020 million |
| Die size | 116 mm² | 87 mm² |
| GPU variant | — | GT 740M |
Mobile graphics
| Release date | May 4th, 2012 | Aug 26th, 2013 |
|---|---|---|
| Generation | GeForce 600M | GeForce 700A |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x8 |
| Reviews | 2 in our database | — |
| Predecessor | GeForce 500M | GeForce 600A |
| Successor | GeForce 700M | GeForce 800A |
Clocks
| GPU clock | 753 MHz | 980 MHz |
|---|---|---|
| Shader clock | 1505 MHz | — |
| Memory clock | 785 MHz 3.1 Gbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 50.24 GB/s | 14.40 GB/s |
Render Configuration
| Shading units | 96 | 384 |
|---|---|---|
| TMUs | 16 | 32 |
| ROPs | 4 | 8 |
| SM count | 2 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 512 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 3.012 GPixel/s | 7.840 GPixel/s |
|---|---|---|
| Texture rate | 12.05 GTexel/s | 31.36 GTexel/s |
| FP32 (float) performance | 289.0 GFLOPS | 752.6 GFLOPS |
| FP64 (double) performance | 24.08 GFLOPS (1:12) | 31.36 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | 32 W | 33 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | MXM Module |
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 | 3.5 |
| Shader model | 5.1 | 5.1 |
