Hi

I've read through the setup guide past day which is a great help; however, for  powering two 2-blade S1s, are either Corsair CX Series CX750M or EVGA Supernova NEX750B 750W sufficient without OC? With OC? These are 750W units.

Also, what PSU would be quietest since that's pretty important (I'm assuming 2 x 450W would be noisier)? Would 2 x 600W run the quietest compared to 1 x 750W (if it works for 2 S1s)? BTW, there seem to be many different Corsair lines like CX, RM, HX etc. Is there a preference for one of these or are they all equally good (apart from noise)?

TIA