Usually the beep(s) you hear are trying to tell you something. You might want to reference your motherboard manual. You could also try disconnecting everything from your motherboard except video card and see what happens when you power on. (This would leave just your motherboard, processor, memory and video card.) If you have the same problem and you have indeed verified your memory and vid card - you might have a bad processor or motherboard. You might also want to try to clear your CMOS. Instructions for this would also be in your motherboard manual.