I am not familiar with that power supply. According to the specifications it should be adequate for a system with two Nvidia 8800GT video cards in SLI mode.
Here is a link to a chart which includes power consumption for two 8800GT video cards in SLI mode:http://www.anandtech.com/video/showdoc.aspx?i=3140&p=13
For the test which was done two years ago they used an Intel Core 2 Extreme X6800 system. Please read the entire review.