Sapphire HD5770 Flex CrossfireX (3 screens) Review

Today we are using a Keithley Integra Model 2700/E and we are measuring power consumption at VGA card inputs, not full system drain. To test load we first fire up Crysis Warhead at high image quality settings then we follow up with the synthetic Furmark which loads the GPU beyond game engine levels … Furmark is not a particularly realistic reading, but its interesting to document.

The HD5770 Flex consumes 17 watts at idle and the Vapor X consumes 19 watts. When gaming this increases to 84 watts and 87 watts respectively. While Furmark is not a great ‘real world' test scenario both cards rise to 114/118 watts when fully loaded. Realistically around 170 watts when gaming is extremely efficient, especially with such good performance levels on tap.

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