I would like to add the following information to help with the thread:

MSI Suprim X does not throttle. Varying 97-104mh/s with +1200 memory -400 clock, 70% power, 70% fans.
EVGA XC3 Ultra Gaming - Does not throttle. Same settings as MSI above.

Will be testing the following over the coming days:

MSI Gaming Trio
Palit GameRock, 3 units (on this thread it was mentioned it doesn't throttle, so fingers crossed)
MSI Suprim X (the 2nd one so will be able to validate with confidence)