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Overclocking the card to 940MHz increased the GPU temperature to 70°C with our gaming results increasing up to 11%. Bear in mind that each sample overclocks differently, so you might get equal, higher or lower scores depending on the card. We managed a 110MHz overclock for the GPU without meddling with voltages, because while this card supports software voltage regulation - current tools don’t feature support for that.
XFX HD 6850 Black Edition is powered via one power connector. Reference HD 6850 consumes up to 127W (19W in idle) whereas Black Edition will naturally need more.