HD 5750 problems

Ok, first
M4A78LTM
AMD Phenom II x6 2.6
HD 5750
16gb mushkin ram
750w continuous OCZ modular 2x12v which i bought specifically to clear up this problem, thinking the factory one was a glorified door stop, it was (turned out to be 450w peak) but it didnt fix it.


Problem:
I can OC my GPU as much as i want using amd overdrive.
I can OC my CPU as much as i want using the bios.

But i can't do both and play video games. (Eve online in this case, which is by no means demanding on the cpu or gpu)
When i OC my 2.6 to 2.7: If i even turn on overdrive i will get the " radeon driver has stopped and recovered" (with the black screen of shame of course) in a matter of moments.

I have tried increasing Vcore, even though it seems fine. Stopped at 1.375ish
I have attempted to manually edit my ccc profile, giving it higher clocks/voltages on the lower settings, thinking maybe its going idle or something and can't. But that didnt help/

Maybe i just need a little guidance... There are tons of settings in the bios that i don't know the impact of.
the ccc profile has some stuff too but editing that simple looking thing gave me artifacts wtf?

The rig runs everything great, BF3 etc, without any clocking, but whats the point of that?
Currently i keep a glass of milk in there to stay cool, with stock cooler and not much airflow.
Please Tom's Hardware, give me an excuse to buy more LED fans and a tower style cooler damn it!