Power Consumption and Temperatures
With the AMD PowerTune changes that occur with this switch to the overclocked mode on the HD 6990, we can expect additional power consumption – but how much?

AMD Radeon HD 6990 4GB Update - Overclocking Performance - Graphics Cards  1  

Well that’s interesting – the HD 6990 running at 880 MHz actually uses a whopping 60+ watts more power than the base clock version.  Consider that is a 12.8% increase in power usage for a 2-4% increase in performance, obviously the efficiency change here will affect many users’ decisions. 


AMD Radeon HD 6990 4GB Update - Overclocking Performance - Graphics Cards  2

The temperature doesn’t go up very much at the overclocked settings (though the cooler did get louder) but we still are hesitant to applaud the 90C+ degree results in a user’s chassis.

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