Hi
I have similar issues with my TOUGHLIQUID 360 LCD screen. Its on when my pc is off.
You say its because the usb is still charging?????
And the temps are a lot higher on the lcd than other software is reporting. My guess is that the TTRGB pluss software is using another sensor....beats me.....
Please check the software, something is wrong. But the cooling is great.
Best regards
Bjørn