How often has this problem been happening? Ever since you got your motherboard? If so, the mobo is bad, RMA it. Otherwise, try replacing the CMOS battery. Also, after doing that, go into the BIOS setup screen where it displays the current time, and just let it sit there. See if it still goes too fast, even with a new CMOS battery. If so, the board is bad.
I've actually seen that once, back in the day, with an el-cheapo 386 mobo with a Forex chipset. I took it back to the shop, they hardly believed me, until they had it on the bench, looking at the BIOS clock-setting screen, and watching it increment by 3-4 seconds at a time. Very bizarre.