NVIDIA GeForce GT 555M vs NVIDIA GeForce GT 640M LE
Graphics Processor
| GPU model | GF106 | GF108 |
|---|---|---|
| GPU variant | N12E-GE-B-A1 | — |
| Architecture | Fermi | Fermi |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 1,170 million | 585 million |
| Die size | 238 mm² | 116 mm² |
Mobile graphics
| Release date | Oct 27th, 2011 | May 4th, 2012 |
|---|---|---|
| Generation | GeForce 500M | GeForce 600M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Predecessor | GeForce 400M | GeForce 500M |
| Successor | GeForce 600M | GeForce 700M |
| Reviews | — | 2 in our database |
Clocks
| GPU clock | 525 MHz | 753 MHz |
|---|---|---|
| Shader clock | 1050 MHz | 1505 MHz |
| Memory clock | 900 MHz 1800 Mbps effective | 785 MHz 3.1 Gbps effective |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 28.80 GB/s | 50.24 GB/s |
Render Configuration
| Shading units | 144 | 96 |
|---|---|---|
| TMUs | 24 | 16 |
| ROPs | 16 | 4 |
| SM count | 3 | 2 |
| Cache L1 | 64 KB (per SM) | 64 KB (per SM) |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 3.150 GPixel/s | 3.012 GPixel/s |
|---|---|---|
| Texture rate | 12.60 GTexel/s | 12.05 GTexel/s |
| FP32 (float) performance | 302.4 GFLOPS | 289.0 GFLOPS |
| FP64 (double) performance | 25.20 GFLOPS (1:12) | 24.08 GFLOPS (1:12) |
Dimensions & Outputs
| TDP | 35 W | 32 W |
|---|---|---|
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| CUDA | 2.1 | 2.1 |
| Shader model | 5.1 | 5.1 |
