Hello, so I recently changed my GPU from GTX 550Ti to GTX 660 and i noticed that my cpu fan stopped working after the change. That is very strange because if i put my 550 in, CPU fan works, if i put my 660, CPU fan stops working. I've tried changing options in BIOS, didn't help, speedfan app didn't help.
Changed my GPU and CPU fan stopped working.
- Thread starter Eimantas
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JMW22
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- Dec 21, 2015
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What is the make, model and wattage of your power supply (wattage is usually part of the model number)?
Looking at the specs of the two cards, the 550Ti has a max wattage of 116w while the 660 has a maximum wattage of 145w. There is also a 50 watt difference in minimum system power (400w vs 450w):
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-550ti/specifications
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-560/specifications
The difference may not seem like much, but if you bought the system pre-built then they likely threw in the cheapest PSU that would power the system.
Looking at the specs of the two cards, the 550Ti has a max wattage of 116w while the 660 has a maximum wattage of 145w. There is also a 50 watt difference in minimum system power (400w vs 450w):
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-550ti/specifications
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-560/specifications
The difference may not seem like much, but if you bought the system pre-built then they likely threw in the cheapest PSU that would power the system.
JMW22
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Check inside your case and make sure there aren't any loose screws, exposed wires, or other issues that could be causing a grounding issue. However, it sounds like your PSU is probably bad. CX600 has problems:
http://www.tomshardware.com/answers/id-2109845/corsair-cx600m-bad-quality-psu.html
Cheap PSU's fail often. Tom's has reviews of some high quality replacements:
http://www.tomshardware.com/reviews/best-psus,4229.html
But good PSU's can be found on Amazon as well. Look for one with a higher wattage than your current one and a nice warranty. I recommend a 650 or better because the wattage rating actually only refers to the peak wattage, not the wattage that it can sustain. Buying a high quality PSU will save you money in the long run.
http://www.tomshardware.com/answers/id-2109845/corsair-cx600m-bad-quality-psu.html
Cheap PSU's fail often. Tom's has reviews of some high quality replacements:
http://www.tomshardware.com/reviews/best-psus,4229.html
But good PSU's can be found on Amazon as well. Look for one with a higher wattage than your current one and a nice warranty. I recommend a 650 or better because the wattage rating actually only refers to the peak wattage, not the wattage that it can sustain. Buying a high quality PSU will save you money in the long run.
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