AMD Radeon HD 6770 vs ATI Radeon HD 4890
What is the difference between AMD Radeon HD 6770 and ATI Radeon HD 4890. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Juniper | GPU Name | RV790 |
| Juniper XT (215-0754013) | Model number | RV790 XT (215-0758016) |
| TeraScale 2 | Architecture | TeraScale |
| TSMC | Foundry | TSMC |
| 40 nm | Process Size | 55 nm |
| 1,040 million | Transistors | 959 million |
| 166 mm² | Die Size | 282 mm² |
Graphics Card
| Jan 21st, 2011 | Release Date | Apr 2nd, 2009 |
| Northern Islands (HD 6700) | Family | Radeon R700 (HD 4800) |
| End-of-life | Production | End-of-life |
| 129 USD | Launch Price | 249 USD |
| Evergreen | Predecessor | Radeon R600 |
| PCIe 2.0 x16 | Bus Interface | PCIe 2.0 x16 |
Memory
| 1024 MB | Memory Size | 1024 MB |
| GDDR5 | Memory Type | GDDR5 |
| 128 bit | Memory Bus | 256 bit |
| 76.80 GB/s | Bandwidth | 124.8 GB/s |
Performance
| 13.60 GPixel/s | Pixel fillrate | 13.60 GPixel/s |
| 34.00 GTexel/s | Texture fillrate | 34.00 GTexel/s |
| 1,360 GFLOPS | FP32 (float) performance | 1,360 GFLOPS |
Clock Speeds
| 1200 MHz 4.8 Gbps effective | Memory Clock | 975 MHz 3.9 Gbps effective |
| 850 MHz | GPU Clock | 850 MHz |
Render Config
| 800 | Shading Units | 800 |
| 40 | TMUs | 40 |
| 16 | ROPs | 16 |
| 10 | Compute Units | 10 |
| 8 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 256 KB | L2 Cache | 256 KB |
Board Design
| Dual-slot | Slot Width | Dual-slot |
| 198 mm 7.8 inches | Length | 241 mm 9.5 inches |
| 108 W | Thermal design power (TDP) | 190 W |
| 300 W | Suggested PSU | 450 W |
| 2x DVI 1x HDMI 2x mini-DisplayPort | Display Connectors | 2x DVI 1x S-Video |
| 1x 6-pin | Power Connectors | 2x 6-pin |
| C010 | Board Number | B790-31 |
API support
| 11.2 (11_0) | DirectX | 10.1 (10_1) |
| 4.4 | OpenGL | 3.3 |
| 1.2 | OpenCL | 1.1 |
| N/A | Vulkan | N/A |
| 5.0 | Shader Model | 4.1 |