greetings all, just an update for general consumtion re: my problem.
i found that i had the latest bios version (apart from a Beta ver.) so, i talked
to the excellent tech. support at gigabyte.
i was duly advised to remove cmos battery; go out for a few pints; replace battery and
go into setup. apply optimum settings (or failsafe if that didn't work) and then
look at the temp reading again....it worked fine and the cpu temp is back to normal
this may be a standard procedure that i didn't know about, but i am happy that i
have learned a useful lesson. otherwise, a bit of useful knowledge for all...
regards