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Old 06-07-2018, 12:46 PM
Annatier Annatier is offline
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Default H100i v2 - Fan RPM constantly changing, even at fixed %

I've been having this issue for about 2 months now -

I use Corsair Link, and the fan RPM on my H100i v2 will constantly have a very minor up-and-down hum, seemingly changing in tandem with the CPU load. The RPM fluctuates very small amounts, 1260-1320 sometimes to 1380. It occurs this way with the fans set to 'Fixed %', and will even fluctuate if I set a fan curve, regardless of its range. Regardless of settings, the pump will even fluctuate small amounts; 1950-1980 RPM, etc.

I've done a small bit of troubleshooting the last few days, and have tried;

Making sure the Fans/Pump are associated with the appropriate cooling group in LINK, which I believe should be 'H100i V2 Temp' group -- correct me if I'm wrong.

Disabling any other fan softwares that don't play well with LINK. I don't use another software aside from MSI Afterburner which I use to set my GPU fan curve. Even then, I closed Afterburner using the Task Manager and then checked my fan RPMs, the problem persisted.

Using the Task Manager to close LINK, then using HWMonitor to check if the fan RPMs were still fluctuating; they were. (I don't actively run/use HWMonitor; it was just for this test.)

Rolling LINK back to a previous version (, then back to current version, as previous version didn't solve the issue.)

Double checking my BIOS to make sure Q-fan control was set to off.

And as I've mentioned, it seems to be associated with even a slight increase in CPU activity. The fans will have an increased hum, going up and down every few seconds with CPU load even at fixed %. I don't want to assume it's associated with the pump going bad, as my CPU temps are totally fine.

(GIF of LINK display of temps, rpms, and CPU activity)

I did read a much older post about an identical issue, which leads me to believe there might be a fix. Though, their fix isn't applicable to me unfortunately, as I don't use any form of software like that.

Is this a common occurrence, is it normal, or am I simply overlooking something?

Any assistance is greatly appreciated!

(Apologies if this post would be better suited to the LINK section of the forums, but I wasn't sure where to post.)
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fans, h100i v2, link, rpm, troubleshooting

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