In another thread someone else was reporting:
"+12V is only about 7.9V, and +5V reads as 3.9V. Readings were taken using CPUID HWMonitor and Pirifom Speccy; both give the same values. In BIOS though, the voltage readings appear correct."
Testing further with a multi-meter the same person reported:
"Quick voltage check done while running 3DMark2006. I used an unconnected Molex connector and tested DC volts from ground to the yellow wire while the system was under load. 12V readings are steady between 12.2 and 12.15."