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What's the best stable gfx overclock you've managed?

I usually find the Zalman VF-900 style coolers best for GPUs on air... I only volt mod by +0.05 or +0.1 max tho generally.
 
My best was my 9800 NP that I flashed with the Pro BIOS and then overclocked it to just below XT speeds. Loved that card!

My 8800GTS 512MB manages 17% on the core and just 8% on the memory :(
 
not tried to overclock my hd3850 yet, its already factory overclocked to 720/1800 from the reference clocks of 668/1656 so i dont think i would be able to get far though. runs at about 29c idle, abit higher load atm due to it came with a zalman-style cooler rather than the normal blower style one, so if i do try and overclock it itll probably just be the limit of the core i run into rather than heat problems.
 
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