Sorry for the late reply! I trust the compatibility checker for the most part. I would check and see if anyone uses this cooler for Threadripper on YouTube (Gamernexus, jayztwocents, etc.) Side note, if the cooler fits but doesn't cover the full ihs it can still have full die coverage on Threadripper due to the massive ihs. There should be an online manual for clearances for the case and everything.
Thanks man! I'll be buying and assembling within the next few weeks. I'll post a build and link you.