NVIDIA GeForce 820M vs NVIDIA GeForce GTX 660 Rev. 2
Graphics Processor
| GPU model | GF117 | GK104 |
|---|---|---|
| GPU variant | N15V-GM-B-A2 | — |
| Architecture | Fermi 2.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 585 million | 3,540 million |
| Die size | 116 mm² | 294 mm² |
Mobile graphics
| Release date | Nov 27th, 2013 | — |
|---|---|---|
| Generation | GeForce 800M | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Predecessor | GeForce 700M | — |
| Successor | GeForce 900M | — |
Clocks
| GPU clock | 625 MHz | — |
|---|---|---|
| Shader clock | 1250 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 | 64 bit | 192 bit |
| Bandwidth | 14.40 GB/s | 144.2 GB/s |
Render Configuration
| Shading units | 96 | 960 |
|---|---|---|
| TMUs | 16 | 80 |
| ROPs | 8 | 24 |
| SM count | 2 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 128 KB | 384 KB |
| SMX count | — | 5 |
Performance
| Pixel rate | 2.500 GPixel/s | 20.64 GPixel/s |
|---|---|---|
| Texture rate | 10.00 GTexel/s | 82.56 GTexel/s |
| FP32 (float) performance | 240.0 GFLOPS | 1.981 TFLOPS |
| FP64 (double) performance | 20.00 GFLOPS (1:12) | 82.56 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | 15 W | 140 W |
|---|---|---|
| Outputs | No outputs | 2x DVI1x HDMI1x DisplayPort |
| Slot width | — | Dual-slot |
| Length | — | 241 mm 9.5 inches |
| Suggested PSU | — | 300 W |
| Power connectors | — | 1x 6-pin |
| Board number | — | P2004 SKU 11 |
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 |
Other Features
Graphics Card
| Release date | — | Sep 13th, 2014 |
|---|---|---|
| Generation | — | GeForce 600 |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Reviews | — | 77 in our database |
| Predecessor | — | GeForce 500 |
| Successor | — | GeForce 700 |
