NVIDIA GeForce 820M vs NVIDIA GRID K540Q
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 | 745 MHz |
|---|---|---|
| Shader clock | 1250 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 1250 MHz 5 Gbps effective |
Memory Configuration
| Memory size | 1024 MB | 4 GB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 14.40 GB/s | 160.0 GB/s |
Render Configuration
| Shading units | 96 | 1536 |
|---|---|---|
| TMUs | 16 | 128 |
| ROPs | 8 | 32 |
| SM count | 2 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 128 KB | 512 KB |
| SMX count | — | 8 |
Performance
| Pixel rate | 2.500 GPixel/s | 23.84 GPixel/s |
|---|---|---|
| Texture rate | 10.00 GTexel/s | 95.36 GTexel/s |
| FP32 (float) performance | 240.0 GFLOPS | 2.289 TFLOPS |
| FP64 (double) performance | 20.00 GFLOPS (1:12) | 95.36 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | 15 W | 225 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | Dual-slot |
| Length | — | 267 mm 10.5 inches |
| Suggested PSU | — | 550 W |
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 | — | Jul 2nd, 2014 |
|---|---|---|
| Generation | — | GRID |
| Production | — | End-of-life |
| Launch price | — | 3,599 USD |
| Interface | — | PCIe 3.0 x16 |
