DDR5 XMP Editor

Editor for DDR5 with XMP 3.0/EXPO. Only for regular, non buffered/non ECC DIMMS.

This is a fork of SPD-Reader-Writer, there's no DDR4 support in this fork.

Basic DDR5 support is complete, XMP 3.0 support is mostly complete. EXPO support is in alpha. Tick rounding is not perfect.

Known bugs

Disabling User Profile 1 rarely works somehow

Dump the SPD using SPD-Reader-Writer.
Open SPD dump and change settings to whatever you want.
Save your modified SPD.
Write the modified SPD using SPD-Reader-Writer if it reports a valid checksum (AT YOUR OWN RISK).

Some SPD samples are included in SPD examples, plus a XMP block and an EXPO block in case you need to transplant those.