Product Compare
NVIDIA GeForce GTX 660 Ti vs AMD Radeon R9 390 X2
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Aug 2012 | Sep 2015 |
| Generation | GeForce 600 | Pirate Islands |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Base Clock | 915 MHz | |
| Boost Clock | 980 MHz | |
| Memory Clock | 1502 MHz | 1350 MHz |
| Memory | ||
| Memory Size | 2GB | 8GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 192bit | 512bit |
| Bandwidth | 144.2GB/s | 345.6GB/s |
| Render Config | ||
| Shading Units | 1344 | 2560 |
| TMUs | 112 | 160 |
| ROPs | 24 | 64 |
| L1 Cache | 16 KB (per SMX) | 16 KB (per CU) |
| L2 Cache | 384 KB | 1024 KB |
| Compute Units | 40 | |
| Theoretical Performance | ||
| Pixel Rate | 27.44 GPixel/s | 64.00 GPixel/s |
| Texture Rate | 109.8 GTexel/s | 160.0 GTexel/s |
| FP32 (float) | 2.634 TFLOPS | 5.120 TFLOPS |
| FP64 (double) | 109.8 GFLOPS | 640.0 GFLOPS |
| Graphics Processor | ||
| GPU Name | GK104 | Grenada |
| GPU Variant | GK104-300-KD-A2 | Grenada PRO(215-0880030) |
| Architecture | Kepler | GCN 2.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 3.54 billion | 6.2 billion |
| Die Size | 294 mm² | 438 mm² |
| Board Design | ||
| TDP | 150W | 580W |
| Suggested PSU | 450 W | 950 W |
| Outputs | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 |
| Power Connectors | 2x 6-pin | 4x 8-pin |
| Graphics Features | ||
| DirectX | 12 (11_0) | 12 (12_0) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 2.0 |
| Vulkan | 1.1 | 1.2 |
| CUDA | 3.0 | |
| Shader Model | 5.1 | 6.3 |