I bought a Radeon HD 4670 3 days ago cus my Geforce 8600gts broke down.

The card was installed by the pc-store and the latest drivers were added, nevertheless im getting random crashes.

Ive tried to reinstall the drivers
Ive read on the ATI forum that Rivatuner which keeps the clockspeed at 750 mhz could be the solution, it isn't...


I also bought the citybuilder game Cities XL 2011 a few days ago which is running great...

Ive never experienced any hardware problems with DDO, please advise..