>>One thing to take into consideration here... MY two wires are>attached to a two wire plug.. side by side, so they could be>plugged into a three wire mb connection either way :-) Also>fully backwards if you like.. this is NEW 2003 ATX PS so>should be up to date for connectors, so why the two pin ? I>don't know..>In that case, my guess it that it's for thermal monitoring of the power supply. If it was for fan RPM monitoring, it would have a three-pin connector with no wire going to the center pin. If you look at page 2-28 of the Asus MB manual, there's a diagram at the bottom of the page that shows a two-wire connector near the bottom right corner of the MB for a power supply thermal connector. (I'm looking at the online manual, assuming that the page numbers are the same as the paper manual.)But, I'm like you, I'm a chicken when it comes to connecting wires I'm not sure about. Did the power supply come with a manual, or is it a brand-name PS that has a support website?

>In that case, my guess it that it's for thermal monitoring of>the power supply. If it was for fan RPM monitoring, it would>have a three-pin connector with no wire going to the center>pin. If you look at page 2-28 of the Asus MB manual, there's>a diagram at the bottom of the page that shows a two-wire>connector near the bottom right corner of the MB for a power>supply thermal connector. (I'm looking at the online manual,>assuming that the page numbers are the same as the paper>manual.)>>But, I'm like you, I'm a chicken when it comes to connecting>wires I'm not sure about. Did the power supply come with a>manual, or is it a brand-name PS that has a support website?Yeah, that's the spot I had my eye on but as you stated...not worth the expense if it's WRONG in the worst way :-lolPower supply had no manual as it came in the new case. From what I understand that is pretty normal these days. I have Email out to them for answer but I think I may be in for a LONG wait... also Emailed ASUS for answer to my Serial ATA HD problem (other post of mine) but who knows when or IF you will get answers.I really think one of the big problems these days is that most of this stuff is made in non english speaking countries and the translation really hurts the instructions many times. At least enough to cast doubt when the end user needs to do the dirty work. Also why you don't get answers to email many times as the company is only an importer/distributor for the item and any real techs are on the other side of the world.Thanks,