hi ive had my a64 3800+x2 overlocked at 2.5ghz for a couple of months completely stable.but as of late wen i wen i turn my computer off at the mains and ive turned off my pc i turn it back on again and get a checksum error which boots my computer into its default setting 2ghz basically. but i have found if i leave my computer off but on at the mains i do not get this problem. i think its is the battery on the motherboard which is the problem.. i think i needs replacing does anyone think this would stop the problem because its really frustrating.
please help
p.s also it keeps resetting the time.
please help

p.s also it keeps resetting the time.
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