AMD Radeon HD 6770 vs NVIDIA GeForce GTX 660 OEM
Graphics Processor
| GPU model | Juniper | GK104 |
|---|---|---|
| GPU variant | Juniper XT (215-0754013) | GK104-200-KD-A2 |
| Architecture | TeraScale 2 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 1,040 million | 3,540 million |
| Die size | 166 mm² | 294 mm² |
Graphics Card
| Release date | Jan 21st, 2011 | Aug 22nd, 2012 |
|---|---|---|
| Generation | Northern Islands | GeForce 600 |
| Production | End-of-life | End-of-life |
| Launch price | 129 USD | — |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Reviews | 35 in our database | 77 in our database |
| Predecessor | Evergreen | GeForce 500 |
| Successor | Southern Islands | GeForce 700 |
Clocks
| GPU clock | 850 MHz | — |
|---|---|---|
| Memory clock | 1200 MHz 4.8 Gbps effective | 1400 MHz 5.6 Gbps effective |
| Base clock | — | 823 MHz |
| Boost clock | — | 888 MHz |
Memory Configuration
| Memory size | 1024 MB | 1536 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 192 bit |
| Bandwidth | 76.80 GB/s | 134.4 GB/s |
Render Configuration
| Shading units | 800 | 1152 |
|---|---|---|
| TMUs | 40 | 96 |
| ROPs | 16 | 24 |
| Compute units | 10 | — |
| Cache L1 | 8 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 384 KB |
| SMX count | — | 6 |
Performance
| Pixel rate | 13.60 GPixel/s | 21.31 GPixel/s |
|---|---|---|
| Texture rate | 34.00 GTexel/s | 85.25 GTexel/s |
| FP32 (float) performance | 1,360 GFLOPS | 2.046 TFLOPS |
| FP64 (double) performance | — | 85.25 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 198 mm 7.8 inches | 241 mm 9.5 inches |
| TDP | 108 W | 130 W |
| Suggested PSU | 300 W | 300 W |
| Outputs | 2x DVI1x HDMI2x mini-DisplayPort | 2x DVI1x HDMI1x DisplayPort |
| Power connectors | 1x 6-pin | 1x 6-pin |
| Board number | C010 | P2004 |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 3.0 |
