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cmos checksum error resulting from swapping out of cpu

hello,

i have been having a similar problem on two of my computers. computer 1 was having some sort of hardware problem because it would not boot. so, i took components from computer 2 to try and narrow down what could be wrong (eventually everything was moved out of, but put back into computer 2). i finally decided to replace cpu & motherboard on computer 1. so, now both computers are booting, but they're both getting the same boot error at the beginning:

"cmos checksum error - defaults loaded  warning cpu has been changed or cpu ratio changed fail  please re-enter cpu settings in the cmos setup and remember to save before quit"  "f1 to continue or del to enter setup"

so, i've been hitting f1 to get by it for now, but i'd rather that this worked correctly. thanks in advance for the suggestions.

computer 1:
p4 3ghz
ecs pt800ce-a
512mb ddr pc 3200
ati rage fury 128

computer 2:
p4 2.8ghz
ecs 848p-a
512mb ddr pc 3200
xfx geforce 5700le 256mb ddr

0
miguel0666
Asked:
miguel0666
1 Solution
 
CallandorCommented:
Whenever you change cpus, you should reset the CMOS so that old values are not hanging around.
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miguel0666Author Commented:
is that accomplished by taking out the battery?
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CallandorCommented:
You can do that and leave it out for about 1/2 hour, to let the circuits drain, or you can look for a jumper that may be labelled CMOS or something like that and move the jumper from Normal to Clear and back.
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miguel0666Author Commented:
for the jumper option, is it just a matter of putting it on clear one minute and then switching it to normal the next. or do i turn on machine while on clear, turn off, and then put it back on normal.
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CallandorCommented:
Different manufacturers specify different techniques, but switching it from Normal to Clear and back after a few seconds is sufficient, and you don't need to turn the machine on.
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FaircoCommented:
Also check the voltage level of the CMOS batteries. If your motherboard's hardware monitor supports it, simply check it in the BIOS. Otherwise use a multimeter to check it. Failing batteries can be the source of this error too.
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miguel0666Author Commented:
hi again,
well, i did everything that was suggested. i even changed the battery. the checksum error is gone, but i'm still getting: warning cpu has been changed or cpu ratio changed fail  please re-enter cpu settings in the cmos setup and remember to save before quit

any other suggestions?
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CallandorCommented:
Did you try saving after changing something in the BIOS?  See if it still complains - if it does, you may need something more drastic, like a BIOS flash.
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compfixer101Commented:
settings for the speed is wrong go into the setup and change it if you didn't change one of the computers cmos settings look at that and eneter the processor settings in to other.


COMPFIXER101
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miguel0666Author Commented:
thanks for all of the suggestions guys. i ended up changing something that wouldn't screw with my settings too much: numberlock off and usb support for keyboard and mouse. worked like a charm. thanks!
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miguel0666Author Commented:
oh, changing out the battery worked to get rid of the checksum error. thanks for that too!
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