Cubase ASIO performace

Hey guys, I am looking forward to build a new computer with 512GB ram. The old cpu like xeon E5-2696v4 are cheap but also has poor efficiency. So I did a little research and came out with amd threadripper 5000 pro and intel w-2400/3400 series. Amd has relatively low price but 4.5Ghz highest frequency. Intel are expensive and due to ddr5 ram socket, the 512GB ram will cost more than the CPU and Motherboard.
I want to know how exactly CPU is effecting ASIO usage in cubase. Is it only related to frequency? If not, there will be even cheaper choise like EPYC 7f52 with 3.9Ghz and CPU+motherboard costs only 500$ in our country.