cpu/dram speed keeps changing. computer has a 2.4G processor, but when it boots it says its a 1.80G, and I have to go into the bios and change the cpu/dram speed, or it won't boot up. sometimes it changes after booting and will freeze. lately it has gotten worse and takes 2-4 times of changing the bios before it will boot. it seems to revert back to 100/100 and I change it to 133/166 and it works. what can I do to make the change final.