I have this PSU:
I KNOW that this is overkill, for now.
I only have 7 HDDs (2 SSD) 1x3930K 1x7970 on it, it can do much more.
When i was buying it, i got it for half the price \ brand new, so, i was not going to reject that offer
As for OC, i dont do that much, i have no need for that, since, everything i run\play, i can do max without a problem...