I picked up a used Dell 490 dual Xeon - all is well except that the front fan is running just over 3,000 RPM - so it's very noisy. I swapped in a fan from a junk T5400 (same assembly) and have the same problem. With SpeedFan 4.47 it shows 3016 RPM - and regardless of settings it won't slow down. Is there a sensor somewhere that's disconnected? Or any other troubleshooting I can do? Or does someone have the exact screenshots to get SpeedFan to slow it down?
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