Can't pass 275MHz Bus speed.. need help..

I just got a Gigabyte 8IPE 1000 PRO... I've gotten up to 274MHz 100% stable with my 2.4C SL6Z3, even 1 MHz more at 275MHz and I can't boot to windows... I've tried everything.. someone please help me out, maybe I missed something..

What have you tried?

What are the things that you have tried? Such as voltage adjustment, etc. I would also like to know what kind of memory do you have and are you running in dual channel? The only thing slowing my system down is my Geil memory. I can only get about 3.4 stable, and I know this 2.4 will go higher, it just I don't have to money to get new memory. I just keep my system around 3.2 and it's stable as a rock. I've prime95 my CPU at 3.4 and it hangs in there, but play command and conquer and it will quit on me in a heart beat. Hope I'll get to help you with this weird problem.

Yeah I've tried EVERYTHING, but I thinking that maybe something I don't know about the gigabyte board, this is my first one ever, and I'm going to return it.. I don't like to, not to mention the performance is way below the Asus P4P800...