Is it possible on a Dell 670 Workstation to change how the cpu fan speed behaves?
Posted on 2006-04-20
Dell, in it's infinite wisdom had made an error I feel in how they control the cpu cooling fan. It is DIRECTLY linked to cpu activity, NOT heat. If my cpu activity goes from 1% to 20% then the fan INSTANTLY speeds up. And as fast as the cpu activity level goes down, the fan speed also goes down within a few seconds. This amounts to hearing the cpu fan go UP and DOWN as many as 8 times per minute! VERY annoying. It is the second duplicate computer that does this so I know it is NOT a defective machine. Only poorly thought out (but effective) programming of whatever firmware controls the fan speed. I feel that there should be some sort of logic that determines if the cpu activity is on an upswing for more than 30 seconds then gradually up the fan speed. If the activity continues then the fan can respond accordingly. Measuring the heat of the cpu seems like an IDEAL way to sense the need for cooling rather than VERY frequent interrogation of cpu speed to anticipate the probable need for cooling. The constant change of fan speed drives me up the wall. The fan of course has been changed and the cpu and the heatsink on this 4 month old workstation.
Does anyone have a suggestion on how to convert the fan to monitor HEAT instead of cpu activity? It is a 4 wire fan. Quite perky also at a 2.5 amp draw at max speed! Any suggestions would be appreciated.