AMD Radeon HD 6850 vs NVIDIA GeForce GTX 970
Graphics Processor
| GPU model | Barts | GM204 |
|---|---|---|
| GPU variant | Barts PRO (215-0798006) | GM204-200-A1 |
| Architecture | TeraScale 2 | Maxwell 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 1,700 million | 5,200 million |
| Die size | 255 mm² | 398 mm² |
Graphics Card
| Release date | Oct 21st, 2010 | Sep 19th, 2014 |
|---|---|---|
| Generation | Northern Islands | GeForce 900 |
| Production | End-of-life | End-of-life |
| Launch price | 179 USD | 329 USD |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Reviews | 105 in our database | 111 in our database |
| Predecessor | Evergreen | GeForce 700 |
| Successor | Southern Islands | GeForce 10 |
Clocks
| GPU clock | 775 MHz | — |
|---|---|---|
| Memory clock | 1000 MHz 4 Gbps effective | 1753 MHz 7 Gbps effective |
| Base clock | — | 1050 MHz |
| Boost clock | — | 1178 MHz |
Memory Configuration
| Memory size | 1024 MB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 128.0 GB/s | 224.4 GB/s |
Render Configuration
| Shading units | 960 | 1664 |
|---|---|---|
| TMUs | 48 | 104 |
| ROPs | 32 | 56 |
| Compute units | 12 | — |
| Cache L1 | 8 KB (per CU) | 48 KB (per SMM) |
| Cache L2 | 512 KB | 2 MB |
| SMM count | — | 13 |
Performance
| Pixel rate | 24.80 GPixel/s | 65.97 GPixel/s |
|---|---|---|
| Texture rate | 37.20 GTexel/s | 122.5 GTexel/s |
| FP32 (float) performance | 1,488 GFLOPS | 3.920 TFLOPS |
| FP64 (double) performance | — | 122.5 GFLOPS (1:32) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 198 mm 7.8 inches | 267 mm 10.5 inches |
| TDP | 127 W | 148 W |
| Suggested PSU | 300 W | 300 W |
| Outputs | 2x DVI1x HDMI2x mini-DisplayPort | 1x DVI1x HDMI3x DisplayPort |
| Power connectors | 1x 6-pin | 2x 6-pin |
| Board number | C223 | PG401 |
| Width | — | 111 mm 4.4 inches |
| Height | — | 40 mm 1.6 inches |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 5.0 | 6.4 |
| CUDA | — | 5.2 |
