Product Compare
NVIDIA Tesla K20c vs NVIDIA Tesla K40st
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Nov 2012 | Nov 2013 |
| Generation | Tesla | Tesla |
| Type | Professional | Professional |
| Bus Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Memory Clock | 1300 MHz | 1502 MHz |
| Memory | ||
| Memory Size | 5GB | 12GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 320bit | 384bit |
| Bandwidth | 208.0GB/s | 288.4GB/s |
| Render Config | ||
| Shading Units | 2496 | 2880 |
| TMUs | 208 | 240 |
| ROPs | 40 | 48 |
| L1 Cache | 16 KB (per SMX) | 16 KB (per SMX) |
| L2 Cache | 1280 KB | 1536 KB |
| Theoretical Performance | ||
| Pixel Rate | 36.71 GPixel/s | 34.50 GPixel/s |
| Texture Rate | 146.8 GTexel/s | 138.0 GTexel/s |
| FP32 (float) | 3.524 TFLOPS | 3.312 TFLOPS |
| FP64 (double) | 1175 GFLOPS | 1104 GFLOPS |
| Graphics Processor | ||
| GPU Name | GK110 | GK110B |
| GPU Variant | GK110-885-KA-A1 | |
| Architecture | Kepler | Kepler |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 7.08 billion | 7.08 billion |
| Die Size | 561 mm² | 561 mm² |
| Board Design | ||
| TDP | 225W | 245W |
| Suggested PSU | 550 W | 550 W |
| Outputs | No outputs | No outputs |
| Power Connectors | 1x 6-pin + 1x 8-pin | |
| Graphics Features | ||
| DirectX | 12 (11_0) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.1 |
| CUDA | 3.5 | 3.5 |
| Shader Model | 5.1 | 5.1 |