Best Desktop Pc for Cfd

Hello guys, I recently acquired 96gb of ddr5 5600 ram and 2x3090 Founders Editions and i’m looking for a cpu to power this machine. I want to use it both for ai and cfd and I just cannot decide between an Ultra 7 or a Ryzen 9. On this subreddit there are a lot of divided opinions so it’s hard for me to tell. I use primarily star and want to start using open foam. I would be grateful for your help