Product Compare
NVIDIA GeForce GTX 660 vs NVIDIA GeForce GTX 780 Ti Engineering Sample
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Sep 2012 | Unknown |
| Generation | GeForce 600 | GeForce 700 |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Base Clock | 980 MHz | 875 MHz |
| Boost Clock | 1032 MHz | 928 MHz |
| Memory Clock | 1502 MHz | 1753 MHz |
| Memory | ||
| Memory Size | 2GB | 3GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 192bit | 384bit |
| Bandwidth | 144.2GB/s | 336.6GB/s |
| Render Config | ||
| Shading Units | 960 | 2880 |
| TMUs | 80 | 240 |
| ROPs | 24 | 48 |
| L1 Cache | 16 KB (per SMX) | 16 KB (per SMX) |
| L2 Cache | 384 KB | 1536 KB |
| Theoretical Performance | ||
| Pixel Rate | 20.64 GPixel/s | 55.68 GPixel/s |
| Texture Rate | 82.56 GTexel/s | 222.7 GTexel/s |
| FP32 (float) | 1.981 TFLOPS | 5.345 TFLOPS |
| FP64 (double) | 82.56 GFLOPS | 222.7 GFLOPS |
| Graphics Processor | ||
| GPU Name | GK106 | GK180 |
| GPU Variant | GK106-400-A1 | GK180-425-A1 |
| Architecture | Kepler | Kepler |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 2.54 billion | 7.08 billion |
| Die Size | 221 mm² | 561 mm² |
| Board Design | ||
| TDP | 140W | 250W |
| Suggested PSU | 300 W | 600 W |
| Outputs | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 |
| Power Connectors | 1x 6-pin | 1x 6-pin + 1x 8-pin |
| Graphics Features | ||
| DirectX | 12 (11_0) | 12 (11_0) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.2.175 |
| CUDA | 3.0 | 3.5 |
| Shader Model | 5.1 | 5.1 |