Product Compare
NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon R9 270
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Sep 2014 | Nov 2013 |
| Generation | GeForce 600 | Volcanic Islands |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Base Clock | 980 MHz | 900 MHz |
| Boost Clock | 1032 MHz | 925 MHz |
| Memory Clock | 1502 MHz | 1400 MHz |
| Memory | ||
| Memory Size | 2GB | 2GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 192bit | 256bit |
| Bandwidth | 144.2GB/s | 179.2GB/s |
| Render Config | ||
| Shading Units | 960 | 1280 |
| TMUs | 80 | 80 |
| ROPs | 24 | 32 |
| L1 Cache | 16 KB (per SMX) | 16 KB (per CU) |
| L2 Cache | 384 KB | 512 KB |
| Compute Units | 20 | |
| Theoretical Performance | ||
| Pixel Rate | 20.64 GPixel/s | 29.60 GPixel/s |
| Texture Rate | 82.56 GTexel/s | 74.00 GTexel/s |
| FP32 (float) | 1.981 TFLOPS | 2.368 TFLOPS |
| FP64 (double) | 82.56 GFLOPS | 148.0 GFLOPS |
| Graphics Processor | ||
| GPU Name | GK104 | Curacao |
| Architecture | Kepler | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 3.54 billion | 2.8 billion |
| Die Size | 294 mm² | 212 mm² |
| GPU Variant | Curacao PRO(215-0848000) | |
| Board Design | ||
| TDP | 140W | 150W |
| Suggested PSU | 300 W | 450 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 |
| Graphics Features | ||
| DirectX | 12 (11_0) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 1.2 |
| Vulkan | 1.1 | 1.2 |
| CUDA | 3.0 | |
| Shader Model | 5.1 | 5.1 |