The baseline in multi-testing is that the voltages tested shold be no less that +/- 5%. Addtionally, not mentioned in the above articles: test the ground wire voltages. I realize that this sounds silly at first but this is the rule of thumb for ground voltages: If your multi-tester shows more than .0010 volts at ground in any ground wire you have Mobo voltage back leakage and the mobo is probably fubared!!!
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.