very good reading here for your board
http://enthusiast.hardocp.com/articl...50aHVzaWFzdA==
I believe the 4X setting is called
800 in your HTT setting and you have that
so with the exception of manually setting your command rate to 1T
you have your system well tweaked >>>> I am still very suspecious of your power supply
I can find almost nothing about your power supply >>>> this alone is not good for a $200.00 power supply! a power supply with that price tag is usually a brag component with awesome specs.
yet i cant find the efficiency or rated temp of yoru unit or what testing methods it was rated at >>>>> IMHO its a very over priced tanker
I have a very gut feeling your PSU is starving your vid cards >>>> i did find a coupel of webpages of Epower units that look like all clunkers
http://www.govistashop.com/catalog/i...cturers_id=183
even that $300.00 unit which is 1200 watts >>>> there is no listing for efficiency ........ no temperature rating.............. no talk of 12volt rails amperage rating
all this is making the bells and whistles ring >>>>> counterfeit