Its very cool, (my office is in my basement) airflow is good, I had power limited to 100% already, im going to drop to 90 and play like that for awhile
UPDATE:
Ok i ran GTA5 in safe mode (resest ALL the video settings)
Then i throttled them up, no problems so far
I may have been using some dedicated NVIDIA video settings, and from what I have read on other forums, the Windows 10 special NVIDIA drivers 'rollback' some of the previous fixes from as far back as 6 months ago, hopefully this gets worked out soon.