did i hit a wall with my 170?

[terrordemon]

OK so after a few months I was finally able to put together my pc (specs in sig). So i get everything set, boot up, artifacts. artifacts EVERYWHERE. so, luckily i was able to borrow a spare video card while i RMA my 7800. So i get it up and running after being pissed off about my video card, and start overclocking. I'm able to get it to 275x10 with 1.536V. I am posting this at work so I can't tell you my load temps because i can't remember them exactly, but i think they're something like 40 cpu and 50 pwmic? something like that. So should i try and push this cpu farther? it seems that at higher speeds core 1 is always the first one to fail. Should I try putting more volts into it? Or is there even a point if i'm not going to have it be 24/7 stable, when at 2750 I can get it to be occt, super pi small ftt, S&M, and more stable?

Thanks