I built a new system using Gigabyte MA790DS4H motherboard, AMD triple core black processor 2.4 GHz. Upon powering up, the system gives 3 sets of 3 beeps, then the processor fan almost powers down, then gives the regular OK beep and then the system starts up normally.
This happens everytime I power up. It doesnt happen when I reset using ctrl.alt.del.
Read the motherboard manual, it should indicate what the beeps mean. Each distinct patter of sound has a specific problem associated with it. The motherboard is trying to tell you something. Read the manual and find out what!