Here is the image of this power supply.
http://www.ctsestore.com/sites/default/files/styles/pic_wm/public/HP_DC7900_TOWER_PowerSupply_02.jpg
GPU Link
http://www.asus.com/Graphics_Cards/HD7750T1GD5/
http://www.ctsestore.com/sites/default/files/styles/pic_wm/public/HP_DC7900_TOWER_PowerSupply_02.jpg
GPU Link
http://www.asus.com/Graphics_Cards/HD7750T1GD5/