I just upgraded my ram on my mac pro 3,1 (2008) and the fan is now running at 2500 RPM even though the temp is only 27 C. Two chips of the old memory (Riser A/Dimm 1 and 2) don't show a serial number. Everything else looks correct to my eyes. Any help is appreciated.
Included is a screenshot of my System Info.
Included is a screenshot of my System Info.