That is correct, The neg allways seem to read off, but the Pos is the main concern. Why the alarm tho? Most mobo alarms have a sequence of beeps that are described in the manual. If ou dont have a manual, you can download it from the man. website. BUT! I have had it with cheap PS's! Even the 300w that came with a case I bought had a true voltage reading of 4.85-4.92 on the +5volt rail and a 3.2-3.25v on the 3.3!!!! That S%#^s!You could even hear the fans slow down when the proc was put on a full load situation. I learned my lesson here and just got a 400w antec and the voltage seems to be exact and steady no matter what the load. I also in case you looked at the sys we got, the pelt is powered by a second meanwell power supply designed to power our 226w peltier. So at no time have we put that task in the hands of our sys ps.
Have a great week and thanks to all for advice and tips!