P4B memory volts

OK I finaly got my temps. down a little. Now I'm ready to up the FSB a couple of notches, and the SDRAM voltage. Question is can I up the memory voltage in the BIOS, or is it a jumper pin thing. I can't find anything in the BIOS for this, but I know where the jumper pins are, currently using Rev. 1005, with default volts at 3.4.

Gee thanks for all the help guys, this asus section does'nt seem to get much use. Anyway I raised the volts to 3.5 via the jumpers, running 2-2-2-5 at 169.2 bus speed not to bad ehh?