Help overclocking 4870x2

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Feb 2, 2009
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hi i have a hd 4870x2 and i'd like to overclock it, thing is ati tools wont work everytime i start them i just get a debug is there any issue between it and this card? i'm running windows xp btw.

also i would like to ask 2 more things:
is it possible to change the voltage on the card without soldering anything?
i'm running the card on a p5k pro mobo witch is pci-e 1.0 and 2.0 is recommended for the card should i increase my pci-e frequency?