Registered RAM vs unbuffered RAM: Registered is fine — you won't notice the difference

For single-threaded apps, the latency difference is measured in nanoseconds — you won’t feel it. Registered RAM adds one extra clock cycle, but your CPU waits on storage or network way more. Your Supermicro board supports both, so buy the cheap 32GB RDIMMs. Registered pulls slightly more power, but on a server board you won’t notice.