Quote Originally Posted by p3gaz_001 View Post
this is a great info, but it sound to me a little bit strange, how can vIOH be QPI PLL?? did a read right? btw... this night i'd tried some combos .... from 1.19v IOH to 1.35 it seems to be no differences ... but i'm leaving it at 1.30. and .... by switching off lane 3 and removing power connector to the second 580, 200x23 rolls back to 1.50v , 2 580 200x23 is now 1.518... but, i'd even noticed that, if i try straight 200x23 1.50v when the room temp and liquid temp is low i can succesfully close any bench .. i take for esample the vantage cpu test, once i've finish the test, and i try it to run again it fails, so i'd think that ... this hot days, aren't good for the cooling sys..... and i have to rice up vcore.
Yes, it is very strange... Raja confirmed for us though. the vDC requirements for ioh and qpi pll are the same, so ASUS just tied them together... It's stupid...

I'm not sure why your GTX580 does that... Maybe it's bad? Did you try that one by itself? Do you have the EZ_PLUGs connected? For GTX580 SLI you should have at least one EZ_PLUG attached.