Some people are saying my 40A 500W EVGA PSU connected via 2 PCI-E cables to my antminer s3 can be overclocked and some people say I can't.
Now I'm scared to do it.
Assuming your unit will overclock. All the ones I have so far dont go above 218.75.
I used to run S1 overclocked to 393 on 2 PCIE cables and it was fine.
Just give it a try and go in small increments.
EDIT: make sure the PCIE cables are two separate runs from the PSU, not one PCIE cable from PSU that has split off to another cable.