DDR5 Unbuffered Dual Inline Memory Module with 4-bit ECC (EC4 UDIMM) Raw Card E Annex

JESD308-U4-RCE

Published: Mar 2025

This annex JESD308-U4-RCE, DDR5 Unbuffered Dual Inline Memory Module (UDIMM) with 4-bit ECC (EC4 SODIMM) Raw Card E Annex" defines the design detail of x8, 2 Package Ranks DDR5 ECC UDIMM. The common feature of DDR5 UDIMM such as the connector pinout can be found in the JESD308, DDR5 Unbuffered Dual Inline Memory Module (UDIMM) Common Standard.

Committee(s): JC-45, JC-45.3

Free download. Registration or required.

Document Information

Standards & Documents Assistance:

Published JEDEC documents on this website are self-service and searchable directly from the homepage by keyword or document number. 

Click here for website or account help.

To report potential errors or make suggestions for improvement to a published JEDEC standard, please use this form.  JEDEC does not accept requests for implementation assistance or interpretation of documents. For other inquiries related to standards & documents email Angie Steigleman.