Quote Pete Kaine:
Could do with the Gfx cards model number rather than the name. Do you have a link to it?
The CPU could be one of 3 or 4 different chips all with different power draws. If you press the widows key and pause/break on your keyboard it'll tell on the box that opens up what model the chip is.
Haven't bought the extra graphics card yet, but was thinking of something along the lines of this.....