I get constant long (about 8 seconds) loud beeping noise one out of 2 times i turn on my comp.. and i would be really thankful if someone would point me in the right direction.. one out of 2 times i turn on my comp.. it starts beeping.. after i restart it a couple of times, windows starts up and works normally without any problem.I checked the Complete Bios BEEP guide but i didnt really find anything for my situation.. I have a custom built comp.. XFX nForce 790i ultra sli motherboard with Core2Duo Processor (3.16ghz), 6 gb of ram, (3x 2gb, there r 4 slots for ram.. so 3 out of 4 are filled) , 750w power supply, GTX470 vid card..