^^^
No you don't need to change the voltages until the cards begins to become unstable with the amount of overclock.
My 5870 gets to 940Mhz without the need to increase voltages etc.
You can also flash the card to an unlock bios that allows you to increase the voltages and overclock speed etc and you should then maybe get to 1000mhz but I'v not personally tried that.
No you don't need to change the voltages until the cards begins to become unstable with the amount of overclock.
My 5870 gets to 940Mhz without the need to increase voltages etc.
You can also flash the card to an unlock bios that allows you to increase the voltages and overclock speed etc and you should then maybe get to 1000mhz but I'v not personally tried that.