Hey, I recently bought a EVGA GTX660 Superclocked GPU my computer is a Lenovo H520 with a cih61mi MoBo and the power supply has already been upgraded to 600 watts. When the GPU is attached to the PCI-E 3.0 slot I get no video output or beep code i just get nothing, Once i remove the card I get usual integrated graphics (They were disabled and uninstalled when I tested) I am wondering if there is any way to make it work or if incompatible what would be an equivalent working GPU. Thank you for your help.