Fixing DDR4-1867 on a Supermicro server


If you’re refurbishing an old box that’s only detecting your DDR4-2133 or 2400 as 1867 MHz, get into the BIOS and disable POR:

  1. BIOS
  2. Advanced Tab
  3. Chipset Configuration
  4. North Bridge
  5. Memory Configuration
  6. Enforce POR → Disabled

A reboot later, and you should have the correct speed your DIMMs support.

Author bio and support


Ruben Schade is a technical writer and infrastructure architect in Sydney, Australia who refers to himself in the third person. Hi!

The site is powered by Hugo, FreeBSD, and OpenZFS on OrionVM, everyone’s favourite bespoke cloud infrastructure provider.

If you found this post helpful or entertaining, you can shout me a coffee or send a comment. Thanks ☺️.