I have run this test several times, with pretty much the same result. I don't physically notice any changes, and the speed of video conversion and playback seem to be normal. Other benchmark programs don't seem to show the same reduction in frames per second.
I recently installed more ram in my iMac. I hadn't done a test for quite a while, but decided to give it a shot again after installing the ram. For some reason, my graphics test scores have significantly decreased along with my fps. Any suggestions as to why this would happen despite having made not changes to my video card?