I up my peaks on my 5970s and I crash

[bboques]

My listed peaks are 725/1000 and can overclock both 5970s to 800/1000 but if I choose 900/1000 everything freezes.  I am running a 850 PSU, which I, swa,pping for a 1250 next week.  Is this the cause? Or is something else preventing proper overclocking?

[1714101062]

1714101062

[1714101062]

1714101062

[1714101062]

1714101062

[deslok]

It's possible you are having issues with the psu but it sounds more like you've hit where the limit if the cards try a smaller jump than 100mhz like 10 or 25

[bboques]

You its good to tweak this way down to the molecular level? DO you guys get down to the exact e.g. 827 or something like that or just ballpark it?

[deslok]

I usually go by 25s then 10s one our two mhz isn't worth that much effort.

[Pipesnake]

I have 3 5970s (so far) and even the best one isn't stable over 850.  They run happily around 810-830

[max in montreal]

my same cards are happyu at 830.

[bboques]

Good feedback all, thanks