Noisy pump on Corsair Hydro Series iCUE H100i?

[ShellShock]

I bought a Corsair Hydro Series iCUE H100i AllInOne water cooler in June. It has been running OK in Quiet mode until today, when I noticed it seems to be a lot noisier. The pump is set to Quiet preset in the iCUE software, but it is running constantly at about 2030 RPM under 0 load, which I think accounts for the noise. I think the RPM was a lot lower before. Coolant temp is 30 C, CPU temp is 30 C, fans 1 & 2 are 0 RPM. I would prefer to trade lower pump RPM for higher CPU temp, which I think I had set before, but I can't find anyway in the iCUE software to change the pump RPM. Is 2030 RPM normal for Quiet mode? iCUE software is up to date, as is the firmware.

 

[ShellShock]

Thanks a lot everyone, that is really helpful. It is definitely not dead silent, and I am sure it used to be a lot quieter, until a few days ago. I put the case on its side, and that helped a little bit, but when I put it upright again, it becomes noisier - I can hear it over playing music, unless the music is loud. I will have to see about an RMA.

Edit: I have now found the problem, and it was not the pump after all, but one of the two fans on the pump's radiator. This fan was going full blast, and did not respond to setting to Zero RPM in iCUE, even after a power off/on. I disconnected the fan from the PSU, reconnected it, and it is now working fine - silent again. Not sure what the cause was - a loose power connection?

Edit2: I think the real cause was a loose USB cable in the pump header. I must have knock it when I swapped out one of my DDR4 modules earlier in the week, and I knocked it again just now, so iCUE was not detecting the pump at all. Reseating the USB plug has fixed the problem.