NVIDIA GeForce 820A vs NVIDIA GeForce GTS 250M
Graphics Processor
| GPU model | GF117 | GT215 |
|---|---|---|
| GPU variant | N15V-GM | N10E-GE-A2 |
| Architecture | Fermi 2.0 | Tesla 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 40 nm |
| Number of transistors | 585 million | 727 million |
| Die size | 116 mm² | 144 mm² |
Mobile graphics
| Release date | Mar 17th, 2014 | Jun 15th, 2009 |
|---|---|---|
| Generation | GeForce 800A | GeForce 200M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Predecessor | GeForce 700A | GeForce 100M |
| Successor | GeForce 900A | GeForce 300M |
Clocks
| GPU clock | 775 MHz | 500 MHz |
|---|---|---|
| Shader clock | 1550 MHz | 1250 MHz |
| Memory clock | 900 MHz 1800 Mbps effective | 800 MHz 3.2 Gbps effective |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 14.40 GB/s | 51.20 GB/s |
Render Configuration
| Shading units | 96 | 96 |
|---|---|---|
| TMUs | 16 | 32 |
| ROPs | 8 | 8 |
| SM count | 2 | 12 |
| Cache L1 | 64 KB (per SM) | — |
| Cache L2 | 128 KB | 64 KB |
Performance
| Pixel rate | 3.100 GPixel/s | 4.000 GPixel/s |
|---|---|---|
| Texture rate | 12.40 GTexel/s | 16.00 GTexel/s |
| FP32 (float) performance | 297.6 GFLOPS | 240.0 GFLOPS |
| FP64 (double) performance | 24.80 GFLOPS (1:12) | — |
Dimensions & Outputs
| TDP | 15 W | 28 W |
|---|---|---|
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 12 (11_0) | 11.1 (10_1) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| CUDA | 2.1 | 1.2 |
| Shader model | 5.1 | 4.1 |
