Now you know! ;)

Anyway, that's true and wrong at the same time. The Radeon HD6670 is a very power efficient card, but the Radeon HD7750 performs even BETTER for much less power! Here's an example to compare power draw :)

http://www.hwcompare.com/11733/radeon-hd-6670-oem-1gb-vs-radeon-hd-7750/

The 7750 performs better, and consumes less power (less strain on your PSU). Win win situation :D