tb40nd

well this option used to be available for my sd/mmc card but the other day i changed it to optimize for performance and it has been greyed out ever since. also, since i changed it to performance i havent been able to use my secure digital cards and i need to know how to change it back to optimize for quick removal? anyone?

i dont understand you problem... you were upgrading from dx9b to dx9c - if dxdiag is showing you have dx9c what is the problem?