Not worth paying double for ECC RAM on a secondary Plex server

No.

For a secondary Plex server with a few users, ECC RAM is a waste of money. Plex doesn’t need it, and you won’t notice the difference.

ECC RAM corrects single-bit memory errors. That matters for servers crunching financial data or running 24/7 databases. For streaming video, a bit flip might cause a tiny artifact in one frame — something nobody will ever see. And on a secondary server? Even less risk.

If you already have ECC components, fine. But paying double? That’s money better spent on more storage, a faster CPU, or a bigger SSD for metadata. Your Plex library will thank you.

Future You will be happier with a bigger hard drive than with error-correcting RAM that goes completely unused.