I try not to approve too many necro posts, but given the cost of GPU’s right now…
From what I’ve read/seen online, they run hot in general, regardless of application.
Discussions that mention hitting 80° or more quickly switch to one about cooling instead.
Could always run the Uniengine benchmark or similar, turn on/off features until you find one that ramps up the temperature like crazy 
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If that is a standard UE4 feature, it’d explain the issue 3080 owners are facing, at least with UE4 based games.