AMD Radeon HD 6790 vs NVIDIA Quadro P400
Graphics Processor
| GPU model | Barts | GP107 |
|---|---|---|
| GPU variant | Barts LE (215-0798002) | — |
| Architecture | TeraScale 2 | Pascal |
| Foundry | TSMC | Samsung |
| Manufacturing process | 40 nm | 14 nm |
| Number of transistors | 1,700 million | 3,300 million |
| Die size | 255 mm² | 132 mm² |
Graphics Card
| Release date | Apr 4th, 2011 | Feb 7th, 2017 |
|---|---|---|
| Generation | Northern Islands | Quadro |
| Production | End-of-life | End-of-life |
| Launch price | 149 USD | — |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Reviews | 37 in our database | — |
| Predecessor | Evergreen | — |
| Successor | Southern Islands | — |
Clocks
| GPU clock | 840 MHz | — |
|---|---|---|
| Memory clock | 1050 MHz 4.2 Gbps effective | 1002 MHz 4 Gbps effective |
| Base clock | — | 1228 MHz |
| Boost clock | — | 1252 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 64 bit |
| Bandwidth | 134.4 GB/s | 32.06 GB/s |
Render Configuration
| Shading units | 800 | 256 |
|---|---|---|
| TMUs | 40 | 16 |
| ROPs | 16 | 16 |
| Compute units | 10 | — |
| Cache L1 | 8 KB (per CU) | 48 KB (per SM) |
| Cache L2 | 512 KB | 512 KB |
| SM count | — | 2 |
Performance
| Pixel rate | 13.44 GPixel/s | 20.03 GPixel/s |
|---|---|---|
| Texture rate | 33.60 GTexel/s | 20.03 GTexel/s |
| FP32 (float) performance | 1,344 GFLOPS | 641.0 GFLOPS |
| FP16 (half) performance | — | 10.02 GFLOPS (1:64) |
| FP64 (double) performance | — | 20.03 GFLOPS (1:32) |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| Length | 198 mm 7.8 inches | 150 mm 5.9 inches |
| TDP | 150 W | 30 W |
| Suggested PSU | 450 W | 200 W |
| Outputs | 2x DVI1x HDMI1x DisplayPort | 3x mini-DisplayPort |
| Power connectors | 2x 6-pin | None |
| Board number | C220, C222 | PG212 SKU 500 |
| Width | — | 69 mm 2.7 inches |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 6.4 |
| CUDA | — | 6.1 |
