AMD Radeon R9 270X vs NVIDIA GeForce GTX 660
What is the difference between AMD Radeon R9 270X and NVIDIA GeForce GTX 660. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Curacao | GPU Name | GK106 |
| Curacao XT (215-0848004) | Model number | GK106-400-A1 |
| GCN 1.0 | Architecture | Kepler |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 2,800 million | Transistors | 2,540 million |
| 212 mm² | Die Size | 221 mm² |
Graphics Card
| Oct 8th, 2013 | Release Date | Sep 6th, 2012 |
| Volcanic Islands (R9 200) | Family | GeForce 600 |
| End-of-life | Production | End-of-life |
| 199 USD | Launch Price | 229 USD |
| 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 | P2030 |
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 |