AMD Radeon R9 270X vs NVIDIA GeForce GTX 660 Rev. 2
What is the difference between AMD Radeon R9 270X and NVIDIA GeForce GTX 660 Rev. 2. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Curacao | GPU Name | GK104 |
| GCN 1.0 | Architecture | Kepler |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 2,800 million | Transistors | 3,540 million |
| 212 mm² | Die Size | 294 mm² |
Graphics Card
| Oct 8th, 2013 | Release Date | Sep 13th, 2014 |
| Volcanic Islands (R9 200) | Family | GeForce 600 |
| End-of-life | Production | End-of-life |
| Sea Islands | Predecessor | GeForce 500 |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 2 GB | Memory Size | 2 GB |
| GDDR5 | Memory Type | GDDR5 |
| 256 bit | Memory Bus | 192 bit |
| 179.2 GB/s | Bandwidth | 144.2 GB/s |
Performance
| 33.60 GPixel/s | Pixel fillrate | 20.64 GPixel/s |
| 84.00 GTexel/s | Texture fillrate | 82.56 GTexel/s |
| 2.688 TFLOPS | FP32 (float) performance | 1.981 TFLOPS |
| 168.0 GFLOPS (1:16) | FP64 (double) performance | 82.56 GFLOPS (1:24) |
Clock Speeds
| 1000 MHz | Base Clock | 980 MHz |
| 1050 MHz | Boost Clock | 1032 MHz |
| 1400 MHz 5.6 Gbps effective | Memory Clock | 1502 MHz 6 Gbps effective |
Render Config
| 1280 | Shading Units | 960 |
| 80 | TMUs | 80 |
| 32 | ROPs | 24 |
| 16 KB (per CU) | L1 Cache | 16 KB (per SMX) |
| 512 KB | L2 Cache | 384 KB |
Board Design
| Dual-slot | Slot Width | Dual-slot |
| 241 mm 9.5 inches | Length | 241 mm 9.5 inches |
| 180 W | Thermal design power (TDP) | 140 W |
| 450 W | Suggested PSU | 300 W |
| 2x DVI 1x HDMI 1x DisplayPort | Display Connectors | 2x DVI 1x HDMI 1x DisplayPort |
| 2x 6-pin | Power Connectors | 1x 6-pin |
| C631, C632 | Board Number | P2004 SKU 11 |
API support
| 12 (11_1) | DirectX | 12 (11_0) |
| 4.6 | OpenGL | 4.6 |
| 1.2 | OpenCL | 3.0 |
| 1.2 | Vulkan | 1.1 |
| 5.1 | Shader Model | 5.1 |