AchillesViper :
clutchc :
The MSI website is slow for me right now, so I can't download your manual. If you still have your MB manual check to see if the header in question has speed control. If you don't have a manual, you can download it here: http://www.msi.com/product/mb/P67AGD53_B3.html#/?div=Manual
it says the 3 prongs are for ground +12V and seonsor
Yes, that is what all 3 wire fans have. But that's not what I meant.
Look on pages 3-17 and 3-18 of the MB manual. It explains how to set the speed for the SYS FAN 1 and SYS FAN 2 headers. Have you ever explored the BIOS before?