my wei for my ati radeon went from a 7.4 to a 5.9 after i overclocked it whats going on can i get it back to the 7.4
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What Windows "Experience Rating" tells you shouldn't be what you take into the highest consideration. Play some games etc and see if it's better than what you had stock.
Also run a FurMark test.
What experience you get playing games is the thing to look at as said. Fur mark etc is ok for a base benchmark to compare future upgrades against but i wouldn't use it as a marker for how good a PC is in general.