Asus Maximus iv Gene-Z Voltage Issue

Hey all,
I've been trying to push my cpu harder and harder with each successive benching session, but I've run into a problem. I get BSODs with error code 124 (not enough vcore), but I can't raise my vcore past 1.54 without getting a "cpu overvoltage" message from my mobo. Anyone had the same issue? Is there a different bios I could flash to?

A 0x124 BSOD can also be caused by excessive or insufficient QPI/VTT/VCCIO, and I believe it's called VCCSA/IO voltage on that board. Even though VCCSA is the System Agent voltage, the default value that Asus gives to the VCCSA/IO voltage is 1.052, which is the default VCCIO voltage w/ default VCCSA at ~.920v