I am running two 7970's and am adding a 3rd here in a few days (Mainly a Gaming Rig)but mining when I am not gaming. I was wondering though does the minimum share difficulty that BTCguild sends to my miners make a difference? Currently it is just the default of 1 but can go all the way up to 256 share difficulty. What is going to yield the best results for my hardware?
I am still quite new so any other advise is appreciated!