That's cutting it too close for the PSU. Besides, there's no need to overclock them now. The difference is literally pennies a day between stock clock and overclocked if you're only running six.
Yup that is cutting it a little close, but then again, I have PSUs that are around about as close as those specs and have been running for months without trouble, and have 2 other PSUs that supposed to have a single 50amp 12v rail each, but you can barely keep them operating at 325MHZ downclock. So sometimes your better guarantee, is to search to see if others are using them.
