The Radeon HD 6570 GDDR5 reference card is crippled by a 675 MHz clock limit in the Catalyst Control Center Overdrive panel. So, we use the MSI Afterburner overclocking tool to push things further. The card rewards our efforts with 845 MHz core and 1150 MHz memory overclocks. That’s a 195 MHz increase on the core, which is 45 MHz more than a stock Radeon HD 6670. Even more impressive is that this is the maximum core clock that Afterburner allows.
The Radeon HD 6670's Turks GPU is already clocked fairly high at 800 MHz. But we manage to push it to 940 MHz. The memory shares the same overclock as the Radeon HD 6570 GDDR5 at 1150 MHz.
In addition, we put these cards together in a CrossFire configuration. We wanted to run them both at stock Radeon HD 6670 specs. However, Afterburner crashes with both cards installed, so we lowered the Radeon HD 6670 clocks to simulate 6570 GDDR5 CrossFire performance:
With higher clocks, the Radeon HD 6570 passes stock Radeon HD 6670 performance. The overclocked Radeon HD 6670 shows a definite improvement, but can’t quite catch the GeForce GTS 450. Two Radeon HD 6570 GDDR5 cards in CrossFire perform surprisingly close to the Radeon HD 6790.
- Introducing The New Sub-$100 Radeons
- Radeon HD 6570 GDDR5 And Radeon HD 6670
- Test Setup And Benchmarks
- Benchmark Results: Synthetics
- Benchmark Results: Crysis 2
- Benchmark Results: Bulletstorm
- Benchmark Results: Metro 2033
- Benchmark Results: Aliens Vs. Predator
- Benchmark Results: F1 2010
- Benchmark Results: Just Cause 2
- Benchmark Results: H.A.W.X. 2
- Anti-Aliasing Benchmarks
- Overclocking And CrossFire Benchmarks
- HD Video Quality: HQV 2.0 Benchmark
- Power, Temperature, And Noise Benchmarks
- Conclusion: A Good HTPC Option, But A High MSRP