Had OCZ SLI 8500 running 2.4+ 24/7 for a year, and benched it up to 2.7v and never had a problem, though it didn't scale aswell up there in the volt's as it did from 2.0-2.5v.

I actually thought I killed those sticks during a bench at 2.6v, but nope, theyre still hanging on, just a RAID issue (used some different files from the driver set)

So even though I wouldn't recommend going over the EVP, it is there for a reason, I would expect safe operation at the EVP (2.35v) 24/7. Seeing how they're flex (im assuming you have them with liquid) then keeping them cool shouldnt be an issue.

LOL I see some people worrying about .1v overvolting, try 0.7 on my P5N32E-SLI.