NVIDIA GeForce GTX 660 vs NVIDIA GeForce GTX 950
Graphics Processor
| GPU model | GK106 | GM206 |
|---|---|---|
| GPU variant | GK106-400-A1 | GM206-250-A1 |
| Architecture | Kepler | Maxwell 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 2,540 million | 2,940 million |
| Die size | 221 mm² | 228 mm² |
Graphics Card
| Release date | Sep 6th, 2012 | Aug 20th, 2015 |
|---|---|---|
| Generation | GeForce 600 | GeForce 900 |
| Production | End-of-life | End-of-life |
| Launch price | 229 USD | 159 USD |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Reviews | 77 in our database | 76 in our database |
| Predecessor | GeForce 500 | GeForce 700 |
| Successor | GeForce 700 | GeForce 10 |
Clocks
| Base clock | 980 MHz | 1024 MHz |
|---|---|---|
| Boost clock | 1032 MHz | 1188 MHz |
| Memory clock | 1502 MHz 6 Gbps effective | 1653 MHz 6.6 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 192 bit | 128 bit |
| Bandwidth | 144.2 GB/s | 105.8 GB/s |
Render Configuration
| Shading units | 960 | 768 |
|---|---|---|
| TMUs | 80 | 48 |
| ROPs | 24 | 32 |
| SMX count | 5 | — |
| Cache L1 | 16 KB (per SMX) | 48 KB (per SMM) |
| Cache L2 | 384 KB | 1024 KB |
| SMM count | — | 6 |
Performance
| Pixel rate | 20.64 GPixel/s | 38.02 GPixel/s |
|---|---|---|
| Texture rate | 82.56 GTexel/s | 57.02 GTexel/s |
| FP32 (float) performance | 1.981 TFLOPS | 1.825 TFLOPS |
| FP64 (double) performance | 82.56 GFLOPS (1:24) | 57.02 GFLOPS (1:32) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | 202 mm 8 inches |
| TDP | 140 W | 90 W |
| Suggested PSU | 300 W | 250 W |
| Outputs | 2x DVI1x HDMI1x DisplayPort | 1x DVI1x HDMI3x DisplayPort |
| Power connectors | 1x 6-pin | 1x 6-pin |
| Board number | P2030 | — |
API Support & Features
| DirectX | 12 (11_0) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.1 |
| CUDA | 3.0 | 5.2 |
| Shader model | 5.1 | 6.4 |
