- Aug 2, 2013
- 24
- 0
- 18,520
Using First Gen ASUS 990FX AMD Motherboard.
Recently decided to upgrade my fans that were being used in a push-pull config for my H40, to 2 Cougar CF-V12HPs because I wanted better temps quieter. After I turned on the computer, when the install was done, one of the fans sounded like a mini vacuum cleaner. This didn't make any sense with the reputation the fans had on Newegg so I checked them out in the Bios. One was spinning at 1800+ RPM. That is 300 RPM OVER its max speed of 1500 RPM. This was with no CPU load at all. It wouldn't stop even after Windows loaded.
At first I thought I had a bad fan, but on a hunch I took off the well behaved fan and just used the loud fan and swapped it to a different power slot, CPU_OPT, instead of the CHA_FAN 2 (Case Fan 2) slot. And low and behold the fan never spun above 1500 RPM and was really quiet. I decided to check the well behaved fan and the same issue occurred.
This led me to believe the fans were in perfect working order. I tested all of the other CHA_FAN slots and they all presented the same problem. CPU_OPT is the only 4-Pin that is properly delivering power to my fans.
Can anyone tell me what the heck is going on? What about my motherboard's power delivery is causing my fans to act this way?
Thanks for any help you can give.
Recently decided to upgrade my fans that were being used in a push-pull config for my H40, to 2 Cougar CF-V12HPs because I wanted better temps quieter. After I turned on the computer, when the install was done, one of the fans sounded like a mini vacuum cleaner. This didn't make any sense with the reputation the fans had on Newegg so I checked them out in the Bios. One was spinning at 1800+ RPM. That is 300 RPM OVER its max speed of 1500 RPM. This was with no CPU load at all. It wouldn't stop even after Windows loaded.
At first I thought I had a bad fan, but on a hunch I took off the well behaved fan and just used the loud fan and swapped it to a different power slot, CPU_OPT, instead of the CHA_FAN 2 (Case Fan 2) slot. And low and behold the fan never spun above 1500 RPM and was really quiet. I decided to check the well behaved fan and the same issue occurred.
This led me to believe the fans were in perfect working order. I tested all of the other CHA_FAN slots and they all presented the same problem. CPU_OPT is the only 4-Pin that is properly delivering power to my fans.
Can anyone tell me what the heck is going on? What about my motherboard's power delivery is causing my fans to act this way?
Thanks for any help you can give.
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