The processor tempature will go up and down according to many factors like processor load, air flow, room tempature...ect...ect...Just watch the 3.3v and dual 3v. If they continue the downward trend then you will need to get another
PSU. I would set the 3.3v back to original value of 2.97. For 3v Dual 2.50 is fine but don't go any lower.
Yes, out of range voltages could affect processor tempature but in this case I believe other factors were the cause. When you adjusted those values you only changed the value at which the warning comes on. So this should not effect the processor temp...
LC