what Ryzen X570 motherboards have PLX chips
I don’t think any of them do. there are a few z390 boards from supermicro that have plx chips, they also have 10Gb ethernet, really like them but theyre like $3-400~
at that point if expansion is really that important HEDT might be a better option, x399/x299. ultimately, depends on what you want/need.
thank you for the update, I will wait for the Ryzen Threadripper Castle Peak it has more PCIe lanes for what i want to do.