[NAME]    I have seen mixed things about the Aurora R10 thermals and none of which have a 3090. As long as he got the 1000 watt PSU and CPU liquid cooling . . . should be good.  You may need to upgrade the case fans, primarily for noise related issues. I would not be too concerned about 32GB of dual channel RAM . . . depending on the specific demands on the usage regime.
My dad Bought a Aurora r10 for a triple monitor racing rig, with these specs;  Should I be concerned about thermals? It should be all here and put together by Christmas and I want to make sure he doesn't experience thermal throttling; stuttering, frame rates dropping, and/or crashing.  I have seen mixed things about the Aurora R10 thermals and none of which have a 3090.  Also that ram speed is too slow, I might have to upgrade that for him.  I was not aware of this purchase until 2 days ago, some computer guy at his work recommended it. 
Aurora R10, possible thermal problem?