It sounds like you may have killed your motherboard. Are the fans in the computer still running? Do you get any beeps?
Try the RAM and video card in a different computer if you can.
What is your current video card? What resolution/size is your monitor?
the video card is 8500GT 2560 x 1600 all my fans are running including the video card and it doesnt have any beep and my monitor dont response with or without the ram not even a single message from the pc, and too bad i dont have any other deskptop computer i can test on.
What do you think might be?? video card or motherboard?