9800pro flash to XT help OC much?

Most I can get now without artifacts is 383core/364mem. Would flashing to XT bios allow me to get a higher OC or just screw my by setting it at clocks it cant handle?

Is on stock cooler but I got a massive fan blowing a few inches away from it (think 1'x1' 5000rpm fan).

it might but your card better have an r360 core and be able to handle xt clocks with out artifacting

If 383 core is all you can get I wouldnt flash. The xt core is 410

412*