Troubleshooting noisy fan?

[ckellmeyer]

Looking for advice before opening up my rig to track down fan noise. Thought i would bounce this off the experts. This forum group gave me excellent advice in building the rig, thanks!

Problem seems to be at low/idle fan speeds (which is most the time), one of the fans is making a annoying repetitive sound. could be something loose or fan out of balance maybe. My approach was going to be to hopefully isolate to which fan (i think its one of 2 front input fans), but then what do it do? just replace it or any suggestions to "fix" it.

Air flow/cooling is 2 front input 140 mm (stock fans with case); then a 140 push on the thermalright macho heatsink and a 140 output (on other side of heatsink) (both these are identical thermalright PWM's). I used ASUS fan expert 2 for fan profiles.

i am guessing i will end up replacing front stock fans. Any other suggestions are welcome.

While here, i also notice that all fans spike up when switching graphics settings/screens (i.e. exiting a game back to windows and/or sometimes during load screens). it only lasts 2-3 seconds or so, but is loud and just curious why.

Besides the above, you cant hear the system at all, stays very cool and allows 30% overclock (and still cool).

Thanks and happy new year!

[xan_user]

viewtopic.php?t=18564

[CA_Steve]

The simplest answer is something is touching the fan(s). The front R4 fans can slip in the mounts during case assembly/disassembly/movement and lean against the hard drives/cage. Check that out. Or, it could be a wire routed against a fan.

[ckellmeyer]

Thanks for both replies. Will check into it tonight...

[mehimu]

I;m also in this type of problem, so going to apply this steps. Hope that it will work.