Sorry to hear that you're not getting the performance you expected from your rig.
At higher specs Valorant is generally CPU bound on the main game thread. The biggest limiter to FPS on higher specs is going to be core clock speed of your CPU. That is to say, a 2.7GHZ 32 core processor will perform worse than a 4.5Ghz 4 core processor in most cases. GPU is only one factor of your performance and having a powerful GPU alone will not necessarily guarantee you a higher framerate.
Closed Beta is definitely still a WIP and we're looking into optimizations for both CPU side for higher specs and GPU side for lower end specs. It's just a balancing act of trying to optimize for a wide variety of specs. You're always going to be limited by one or the other.
In terms of the RiotClient issue, I believe that was fixed in a patch pushed out last night. If you're still having problems can you try rebooting your computer? Maybe something prevented you from getting that ...
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