Fan Change causing problems?

July 12, 2011 at 17:35:20
Specs: Windows 7
I don't have the specs with me right now but I can post them later if necessary. I have a desktop ~ 3 years old who's chassis fan started to die. (I had to manually spin it to get it going but then it would spin on its own). The old fan had the large 4 pin connectors that I hooked up directly to the power supply. The new fan has the small 4 pin connectors (PWM I believe?), but my mobo did not have a 4 pin slot. I placed it in a 3 pin CHA_fan2 slot right near the processor. The fan spins at max speed the whole time, but somehow -- unrelated or not -- my CPU temp has gone from 41 to 51 C at idle. So I replace a fan that barely spun and my temperatures go up? Thoughts on what I could have f---ed up?


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July 12, 2011 at 17:50:32
It's approx 28C (83F) in my house right now. My system is running an overclocked A64 with stock heatsink/fan & NO case fans - my CPU temp is currently 44C. My point is, case fans are not an absolute necessity. If you do have one, it should be placed in the rear of the case, blowing outward.

You told us nothing about the fan location plus it's important to know the make/model of the CPU because some run hotter than others. The old P4 Prescott for example is a furnace & was nicknamed the "hot potato".

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July 12, 2011 at 18:28:09
replaced the fan at the back of the case with another fan in the exact same spot.

im pretty sure that was it. I accidentally had the fan facing the wrong way so it was blowing into the PC. lol. Just switched it so I'll see if that fixes things.

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