I assume ThermTrip# signal is between CPU & IMVP chip
ThermTrip# pin is bidirectional & it may be asserted either by processor or IMVP ic.
In my case ThermTrip# pin was false triggered by IMVP IC which was not properly configured for required temperature.
Impact of ThermTrip# assertion cases TM2 to be enabled & processor gets throttled & alway operated at Low Frequency Mode.
I hope the above information be helpful.