*** Official Radeon HD5800 Series Overclocking Thread ***

[Astennu]

Hey guys.
I havent followed this thred and just want to know how high are you pushing the voltage on the core for the 5870 cards? Is 1.35 to high?
I used 1.4V on my previous 4890s 6 months without a problem.

Well the default is 1.16v for the RV870XT. The RV790 has a default of 1.316. And the RV790XT (1GHz) is running on 1.4375v.

And you are looking at 40nm vs 55nm chips. The smaller the transistors get the lower the voltages go.(there are exceptions. It also depends on the chip its design) I see a lot of people running voltages of 1.3+ on the RV870's. With good cooling that should not be a problem. But 1.45+ i would not recommend on wc. But we will have to wait a while until we know it for sure.