Lets go ahead and clock your card up a tad.
Make sure FSX is closed
Set the 3D Core to 600 and the 3D memory to 900 (1.800). Click the TEST CHANGES button and see if it passes and if it does, make sure it remains at the set levels of 600/1800
Fly that. If you notice any graphics error, stop FSX and reduce it by 20MHz on each clock.
breaking my own rule here a bit... just want to see if the system is really stable

I've been waiting for this part




