I was playing around with the OSD today. I had it set to Independent Window mode and had 4 items enabled, 3 of which were from a Corsair H110i AIO cooler. The 4 items were:
Position 1 - H110i Pump RPM (Graph)
Position 2 - H110i Fan 1 RPM (Graph)
Position 3 - H110i Fan 2 RPM (Graph)
Position 4 - Core Temps (Asus Maximus X Hero (Z370) (Graph)
The 2 fan graphs seemed to be erratic - sometimes there, sometimes a flat line. I stepped out of the room for a minute. When I came back, the computer was totally locked up - no cursor, no mouse, no keyboard response. I had to reboot it. When it came back up, in OSD, only Core Temps was still there. The 3 Corsair H110i items were no longer selected in OSD. When I reselected them, the Text, Graph Line, Graph Fill colors, and opacity settings were all back to defaults. Core Temps settings were as I left them, including being in Position #4.
I don't know if the lock-up was caused by the HIWINFO OSD being enabled, or if it has anything to do with having OSD enabled for the Corsair H110i pump and fan, but the machine is normally very stable. I know monitoring Corsair devices can be problematic, but I have been running HWINFO (Pro License) on this computer for years, and it has been reliably reporting data from the Corsair H110i AIO and a Commander Pro. I disabled OSD for now but may try it again and see if it locks up when the Corsair H110i sensor data is enabled in OSD.