So, my system won't give any video output and it beeps ver rapidly for about 6 to 8 seconds, then it stops for about 3 seconds and then continues again. I am using an Intel core i5 750, a gigabyte Ga-p55-usb3, 8 gigs of ddr3 memory, a 500 Watt be quiet powersupply, one ssd and one hdd and a gtx 460. I have tried starting the system without memory and each stick individually. I have also tried a different graphics card. The powersupply worked in my other system, from which I took it. The last time I used my cpu, it worked as well. I have looked online, but couldn't find any beeps like the one I have. I would be very thankful for any help I can get.