ok, but if they were underclocked I'm fairly sure you be a bit cooler. Try a test - as is, then back to max. Run max for a few hours, post the two temp diffs. I'll be really interested in your answer since I haven't been able to uc mem very far before it reverts to max.
Ran a test.. I don't think I need to run it very long at all. The temperature difference was immediate. I waited until things stabilized then took some screenshots/pics of kill-a-watt. Here are my results. (Also, these cards are Sapphire
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102921)
Underclocked memory results:
http://i.imgur.com/X6mYk.jpgDefault memory results:
http://i.imgur.com/gBEJT.jpg
