AMD Radeon HD 6790 vs NVIDIA GeForce GTX 555 OEM
Graphics Processor
| GPU model | Barts | GF114 |
|---|---|---|
| GPU variant | Barts LE (215-0798002) | GF114-200-KB-A1 |
| Architecture | TeraScale 2 | Fermi 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 1,700 million | 1,950 million |
| Die size | 255 mm² | 332 mm² |
Graphics Card
| Release date | Apr 4th, 2011 | May 14th, 2011 |
|---|---|---|
| Generation | Northern Islands | GeForce 500 |
| Production | End-of-life | End-of-life |
| Launch price | 149 USD | — |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Reviews | 37 in our database | — |
| Predecessor | Evergreen | GeForce 400 |
| Successor | Southern Islands | GeForce 600 |
Clocks
| GPU clock | 840 MHz | 736 MHz |
|---|---|---|
| Memory clock | 1050 MHz 4.2 Gbps effective | 957 MHz 3.8 Gbps effective |
| Shader clock | — | 1472 MHz |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 192 bit |
| Bandwidth | 134.4 GB/s | 91.87 GB/s |
Render Configuration
| Shading units | 800 | 288 |
|---|---|---|
| TMUs | 40 | 48 |
| ROPs | 16 | 24 |
| Compute units | 10 | — |
| Cache L1 | 8 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 512 KB | 384 KB |
| SM count | — | 6 |
Performance
| Pixel rate | 13.44 GPixel/s | 8.832 GPixel/s |
|---|---|---|
| Texture rate | 33.60 GTexel/s | 35.33 GTexel/s |
| FP32 (float) performance | 1,344 GFLOPS | 847.9 GFLOPS |
| FP64 (double) performance | — | 70.66 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 198 mm 7.8 inches | 210 mm 8.3 inches |
| TDP | 150 W | 150 W |
| Suggested PSU | 450 W | 450 W |
| Outputs | 2x DVI1x HDMI1x DisplayPort | 2x DVI1x mini-HDMI |
| Power connectors | 2x 6-pin | 2x 6-pin |
| Board number | C220, C222 | P1041 |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | — | — |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 2.1 |
