Product Compare
AMD Radeon HD 7870 XT vs NVIDIA GeForce GTX 660 OEM
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Nov 2012 | Aug 2012 |
| Generation | Southern Islands | GeForce 600 |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Clock Speeds | ||
| Base Clock | 925 MHz | 823 MHz |
| Boost Clock | 975 MHz | 888 MHz |
| Memory Clock | 1500 MHz | 1400 MHz |
| Memory | ||
| Memory Size | 2GB | 1536MB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bus | 256bit | 192bit |
| Bandwidth | 192.0GB/s | 134.4GB/s |
| Render Config | ||
| Compute Units | 24 | |
| Shading Units | 1536 | 1152 |
| TMUs | 96 | 96 |
| ROPs | 32 | 24 |
| L1 Cache | 16 KB (per CU) | 16 KB (per SMX) |
| L2 Cache | 512 KB | 384 KB |
| Theoretical Performance | ||
| Pixel Rate | 31.20 GPixel/s | 21.31 GPixel/s |
| Texture Rate | 93.60 GTexel/s | 85.25 GTexel/s |
| FP32 (float) | 2.995 TFLOPS | 2.046 TFLOPS |
| FP64 (double) | 748.8 GFLOPS | 85.25 GFLOPS |
| Graphics Processor | ||
| GPU Name | Tahiti | GK104 |
| GPU Variant | Tahiti LE(215-0821122) | GK104-200-KD-A2 |
| Architecture | GCN 1.0 | Kepler |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| Transistors | 4.313 billion | 3.54 billion |
| Die Size | 352 mm² | 294 mm² |
| Board Design | ||
| TDP | 185W | 130W |
| Suggested PSU | 450 W | 300 W |
| Outputs | 1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 |
| Power Connectors | 2x 6-pin | 1x 6-pin |
| Graphics Features | ||
| DirectX | 12 (11_1) | 12 (11_0) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader Model | 5.1 | 5.1 |
| CUDA | 3.0 | |