I am running 2 S5s and an SP20 off the same circuit in my garage and it keeps tripping the breaker.
What underclock settings should I use until I can get a dedicated circuit for my mining?
On my SP20 right now I'm at .66v (max .665) and 188W per loop.. Getting steady 1.23 TH/s
On my S5s right now I'm at 312.5M Frequency .. Getting steady 1.15 TH/s
What adjustments can I make to keep that circuit breaker from tripping w/out giving up too much hashing power?
Wow , are you on an old fuse system or 10A?
On a 20Amp fuse I can run 4 SP20's @ 600-700 watts each and 2 S5's at stock speeds with the fuse only getting warm.
Check your wiring.
2*650W+2*590W=2480W 2480W/120V=20.7A Looks like you're at the edge at best.
My 15A breaker supports 1 S3 and 2 S5 or 1540W/120V=12.8A which allows it enough margin to be happy.
I believe it is 20A.. hmm.. could also be the refrigerator on the circuit when the compressor kicks on?

But I would like some clarification:
-For the SP20 what role does Watts play vs Volts (yes I know one is power and one is potential but how does that translate into performance)
-For the S5 what role does Frequency play?