Hello, ~2 years ago I built a rig with an E5300, P45 mobo, and a Sapphire Radeon 4830.
When I first ran the ATI Overdrive utility I got up to 690MHz core and 1040MHz memory clock speeds. Now its only stable at 615 and 950... do cards degrade over time? I don't run it overclocked all the time and it's not overheating.
Also driver 10.6 was causing me to crash like heck so I went back to 10.5 and it seems better.