M3A overclocking

[justapost]

Well it does have 3 rails officially, but according to johnnyguru it appears to have either 2 rails w/o any overcurrent protection (so they could run >18A) or one big rail: http://www.jonnyguru.com/modules.php...=Story&reid=18

This demonstrates that if the two rails are in fact separate, there is no OCP (over current protection) on each rail. Outside of a few traces zig zagging across PCB, I couldn't find how even 12V1 and 12V2 are separate, but I'm going to give Seasonic (the OEM for the Corsair units) the benefit of the doubt and say that we seem to have two 12V rails here, neither with any kind of "limit" on them.

Granted I don't really know what I'm talking about here. Power supplies are not my area of expertise.

That clarifies things. However I can not follow why JonnyGuru assumes there is no overprotection at all. Looking at this image i'd expect 12V1+12V2+12V3 are overprotected together at 40A max.
Seems you do not have a 18A limit with the PSU. Nice.
It should be a great PSU for the MSI 790FX Platinum which has only one 4pin connector but better PWM than the M3A.
You'll run into mosfet temp issues which such loads on the M3A no doubt.

Another note in the Sapphire/DFI mobo with an 8pin connector the cpu uses 12V1+12V2 together.