Mine were mis-located. I moved them as shown in the picture.
CPU thermistor on the back of the liquid cooling block.
SYS on the metal plate backing the motherboard.
That’s just my idea.
I don’t know anything better than Scotch Brand tape. Don’t use the cheap stuff since I’m guessing that eventually the sticky will come off and the thermistor will fall off.
– windy
Windy Weather 