A year ago, my 3DMark06 score was 5378, now it is 4282. What could cause this? Has the scoring changed in 3DMark? The only change I have made is I my CPU is OC'd to 2.5 GHz now. It was 2.2GHz then.
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I don't think just the OC, but genral pc maintenance, you probably have alot more crap running after a year (assuming you haven't formatted).
Yeah could be there's a lot of programs running, taking up your ram. Another thing is display drivers. It coulda been better suited before than now. Last thing I can think of is your psu can't handle it or your system isn't stable.