ctechs

Thanks yes will keep an eye on it. Reading that I might not have had clashes with HWinfo but I was indeed using it especially the few days before this happened. Windows Update seems to be holding back 2004 for a while now, I thought about upgrading but read that there's probably good reasons it's held back for my system so I won't force that either.

Yes I came back here to say that's exactly what I just did and it started working again! I didn't have to manually load it just the "Update" button from within settings under the device. Might be worth doing that if there were conflicts with other monitoring software I don't think adding/removing the device or iCue does anything if the firmware itself is baked on the unit and crashed, who knows.

Since last night my 2 fans on the radiator no longer follow the profile in iCue, they seem to be stuck at quiet but at a rate for a low liquid temperature at around 357 RPM for one and 371 RPM for the other, so now just idling for 30 minutes the the liquid has reached 32C but the RPM doesn't increase like it used to (to maybe 600-800). They don't spin up faster on Extreme or Balanced, they don't spin down if I select Zero RPM. I never had custom curves or fixed RPM profiles. This is with iCue version 3.24 and the latest iCue version to which I'm sticking with atm, I did clean reinstall with reboots in between multiple times. I have had HWinfo but only portable edition and I tried unticking the Corsair safety option, moving the hwinfo exe file (it's not installed anyway), "deleting the driver" if that means anything (Under Driver Management it says driver not installed) The pump control works I can switch between Quiet/Balanced/Extreme and I can hear the sound change like it used to before so do the RPM on the pump speed in iCue. bear in mind the iCue GUI does say the fans are Balanced/Extreme w/e whenever I change it it's not frozen or crashed at least visually. RGB programming also works fine like before. The RPMs change in iCue, sometimes the fan RPMs change a bit too but very infrequently it would go from 357 to 358 for example for one every other minute. I've tried re-seating the USB thing. Even took the back panel off (I'm desperate) and unplugged one fan, iCue pretty quickly showed 0RPM, then again 371 when I plugged it back in and it spun up. I've tried deleting the H100i device in Windows, and letting windows rediscover it, clean installs of iCue, moving the 'configuration' file from the %AppData% dir - nothing works I'm still left with control over the pump and thats it, the cooler is always recognised though. It's a Win10 1909 system on a X570-F motherboard Ryzen 3900 so I don't want to run it with warm liquid..

After uninstalling that version, rebooting, and installing some older one I found linked on this forum ( https://downloads.corsair.com/Files/CUE/iCUESetup_3.24.52_release.msi ) it seems to be working again. I did also delete the "Corsair Composite virtual input device" from within Device Manager before installing but could give it a go without that step see if it works.

This started happening to me too after the latest update 3.33.246 When I boot it's fine, I can see the device and fan speeds, a minute later the colours stop changing and I can no longer see up to date RPMs, colour in iCue is correct but not on the unit itself. If I exit iCue and start it again I no longer see the cooler, just my RAM. It was Working fine for 3-4 months...