The AMD HD 3870X2 graphics processor needs no introduction. However, as some overclockers have already found out, there's no easy way to control voltages to get extremely high clocks out of their $400+ graphics card. Assuming you do not have a VCO PLL divider bug in your card's BIOS (which will limit the core clock to 860MHz no matter what), the only thing really stopping you from reaching 3DMark record books is a pesky voltage problem. Since the power layout of the 3870 is completely different from the 3870X2, the 3870X2 voltages cannot be controlled through software.

Fortunately for all you hardcore overclockers out there with 3870X2s and meaty power supplies, extreme overclocker "Shamino" published a voltage modification guide.

Enjoy.