I hate to be harsh, but this thread is sorta pointless. OC'ing any component of your system is gonna cause instability, even with correct cooling. Games like Battlefield 2 and Oblivion are EXTREMELY system intensive and will cause BSODs and freezes left and right. There are very, very few systems that run fine overclocked with games like these, and they're running fine based on raw luck. That's the number 1 reason why I hate OC'ing...it's not worth the instability. Even if you ramp up the voltage and get even better cooling, etc., chances are you'll still get BSODs because your components are being pushed harder than they're designed for.
I'd ramp it down to the first stable OC and keep it like that. 225 is pretty damn far already!
