Using RAR seems an odd choice. I don't think I've seen a RAR file in over 10 years.
It was popular before broadband for posting large multipart archives to NNTP, but it isn't freeware.

If this project is a scam it's a pretty intricate one if it can do GPU management. That's a lot of extra
baggage just for a malware decoy.

I think the scams will primarily be people offering modded files.