AMD Radeon HD 6870 X2 vs NVIDIA GeForce GTX 460
Graphics Processor
| GPU model | Barts | GF104 |
|---|---|---|
| GPU variant | Barts XT (215-0798000) | GF104-300-KB-A1 |
| Architecture | TeraScale 2 | Fermi |
| 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 | Jul 8th, 2011 | Jul 12th, 2010 |
|---|---|---|
| Generation | Northern Islands | GeForce 400 |
| Production | End-of-life | End-of-life |
| Launch price | 520 USD | 199 USD |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Reviews | 170 in our database | 154 in our database |
| Predecessor | Evergreen | GeForce 200 |
| Successor | Southern Islands | GeForce 500 |
Clocks
| GPU clock | 900 MHz | 675 MHz |
|---|---|---|
| Memory clock | 1050 MHz 4.2 Gbps effective | 900 MHz 3.6 Gbps effective |
| Shader clock | — | 1350 MHz |
Memory Configuration
| Memory size | 1024 MB | 768 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 192 bit |
| Bandwidth | 134.4 GB/s | 86.40 GB/s |
Render Configuration
| Shading units | 1120 | 336 |
|---|---|---|
| TMUs | 56 | 56 |
| ROPs | 32 | 24 |
| Compute units | 14 | — |
| Cache L1 | 8 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 512 KB | 384 KB |
| SM count | — | 7 |
Performance
| Pixel rate | 28.80 GPixel/s | 9.450 GPixel/s |
|---|---|---|
| Texture rate | 50.40 GTexel/s | 37.80 GTexel/s |
| FP32 (float) performance | 2.016 TFLOPS | 907.2 GFLOPS |
| FP64 (double) performance | — | 75.60 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 304 mm 12 inches | 210 mm 8.3 inches |
| TDP | 300 W | 160 W |
| Suggested PSU | 700 W | 450 W |
| Outputs | 2x DVI1x HDMI2x mini-DisplayPort | 2x DVI1x mini-HDMI |
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 |
