This is pretty astounding, really. At these clock speeds, using RivaTuner we were able to get more performance out of our R4830 than a stock HD 4850. To put things into further perspective, the R4830 stock speed is 585 / 900, so the stable 734 / 1121 overclock we obtained is a 28 percent / 25 percent increase. Generally, video cards average about a 5 percent - 8 percent overclocking average, and 10 percent - 15 percent can be considered a nice overclock for a video card. The only other card in the last one and half years of my tenure here at Neoseeker that overclocked nearly as good was the HD 2900 Pro.
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