i found a 160 GB IDE HDD lying around and plugged it into my PC and its starts to beep and so i take it out but it still continued to beep so i spend the next 3 hrs figuring out what was wrong it was that when ever i reconnect a IDE cable(needed as its the only way i can connect a CD-ROM to my pc) to my motherboard it beeps and when i put a stick of ram in the left slot it beeps