Not strictly a Linux query but i have a Sparkle Nforce2 400 motherboard. However, 9 times out of 10 when i switch it on first thing in the morning i get a "CMOS Checksum Error - Loading defaults". i then have to change the BIOS settings and reset the time.
Not the most inconvenient thing in the world but it would be nice to know why it's happening (and why it's not sometimes).
NB. i've replaced the battery the hardware hasn't changed of late.