The Fan on my PC is going nuts
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Could be dirt. Dust and grime eventually get into the works, thus the fan runs slightly slower in normal mode. This causes the heat to increase, until it trips the "fast" mode level. Careful vacuuming may help! Else, replace fan at earliest opportunity.
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I have a similar box, you could try and circumnavigate the speed control (pull of the 2 wires on the speed dial or wire directly).
Chuck Norris counted to infinity - twice.
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One of the two hamsters powering it have died?
"More functions should disregard input values and just return 12. It would make life easier." - comment posted on WTF
"This time yesterday, I still had 24 hours to meet the deadline I've just missed today."
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Is the power to the fan fluctuating?
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Oooooh, you definitely need to buy a whole new system, and only the very bestest/newest will do.
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Phil Harding wrote:
Any one shed any light, it keeps going from slow (quiet) to fast (noisy) for no particular reason I can fathom
Sounds like the the fan is dying. A slight wobble on the hub of the fan can slowly build into a big problem until the motor shaft doesn't always "catch" on the fan and when it does, it wobbles making horrible lound noises. Replace it.
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)