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Omen 880 - System Fan 90B Error

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OMEN By HP 880-109no
Microsoft Windows 10 (64-bit)



I've recently replaced the AIO cooler unit on my Omen 880-109no with a Corsair H80i v2. In this cooler, the two radiator fans are connected to the pump unit, which is in turn connected to the CPU Fan header on the motherboard. The system is working well, with good thermals except for the minor nuisance of System Fan 90B Error on startup. System boots normally to Windows after pressing Enter.


I've also since then replaced the front intake fans with Noctua fans, which are both connected via Y-splitter to the same header where the single stock intake fan used to be. Note that this startup error was present before these fans, so the problem must be with the AIO unit.


At the moment the pump header on the motherboard is empty, but I've also tried populating all headers by connecting the pump to the pump header, and the radiator fans to the CPU fan header. No luck.


Obviously the aftermarket cooler unit is making the system think something is wrong. I did a  BIOS update, but the BIOS had very limited options, I could only see fan RPM's through the Thermal-tab, but no options to control or change anything related.


Is there any way to get rid of, or ignore this error?


Thank you.








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The original fan has a specific start RPM. The error can be caused if the new fan(s) have a lower RPM.

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I am in a very similar situation, only i decided to buy a fan controller for all of my fans, including my CPU fan. Now whenever I power on my system I get that annoying BIOS error about how none of my fans work, and I got no way to turn it off for good

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As the expert is saying the original fan has a specific RPM start time, probably if you find 2 of the original fans or one of them and install it on the new AIO.

I personally lucked out, on one of my Pavilion Gaming Desktops when I replaced the stock cooling with the Big Shuriken 3 and the RPMs of the new fan are matching the stock starting RPMs, so I was not getting any errors, but I know other people replaced with Noctua and were getting constant errors on boot up. 

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