NVIDIA GeForce GT 420 OEM vs NVIDIA GeForce GTX 660
Graphics Processor
| GPU model | GF108 | GK106 |
|---|---|---|
| GPU variant | GF108-200-A1 | GK106-400-A1 |
| Architecture | Fermi | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 585 million | 2,540 million |
| Die size | 116 mm² | 221 mm² |
Graphics Card
| Release date | Sep 3rd, 2010 | Sep 6th, 2012 |
|---|---|---|
| Generation | GeForce 400 | GeForce 600 |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Predecessor | GeForce 200 | GeForce 500 |
| Successor | GeForce 500 | GeForce 700 |
| Launch price | — | 229 USD |
| Reviews | — | 77 in our database |
Clocks
| GPU clock | 700 MHz | — |
|---|---|---|
| Shader clock | 1400 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 1502 MHz 6 Gbps effective |
| Base clock | — | 980 MHz |
| Boost clock | — | 1032 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 128 bit | 192 bit |
| Bandwidth | 28.80 GB/s | 144.2 GB/s |
Render Configuration
| Shading units | 48 | 960 |
|---|---|---|
| TMUs | 4 | 80 |
| ROPs | 4 | 24 |
| SM count | 1 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 384 KB |
| SMX count | — | 5 |
Performance
| Pixel rate | 1.400 GPixel/s | 20.64 GPixel/s |
|---|---|---|
| Texture rate | 2.800 GTexel/s | 82.56 GTexel/s |
| FP32 (float) performance | 134.4 GFLOPS | 1.981 TFLOPS |
| FP64 (double) performance | 11.20 GFLOPS (1:12) | 82.56 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Single-slot | Dual-slot |
|---|---|---|
| Length | 145 mm 5.7 inches | 241 mm 9.5 inches |
| TDP | 50 W | 140 W |
| Suggested PSU | 250 W | 300 W |
| Outputs | 1x DVI1x HDMI1x VGA | 2x DVI1x HDMI1x DisplayPort |
| Power connectors | None | 1x 6-pin |
| Board number | P1071 | P2030 |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | — | 1.1 |
| CUDA | 2.1 | 3.0 |
| Shader model | 5.1 | 5.1 |
