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Title	Document #	Date
DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card C Annex Release Number: Version 2.00	JESD305-R8-RCC	Feb 2025
This standard, JESD305-R8-RCC, DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card C Annex, defines the design detail of x4, 1 Package Rank DDR5 RDIMM with 8-bit ECC. The common feature of DDR5 RDIMM, such as the connector pinout, can be found in the JESD305, DDR5 Registered Dual Inline Memory Module (RDIMM) Common Standard. Committee(s): JC-45, JC-45.1 Free download. Registration or login required.
DDR5 Registered Dual Inline Memory Module (RDIMM) Common Standard Release Number: Version 2.00	JESD305A	Feb 2025
This standard defines the electrical and mechanical requirements for 288-position, 1.1 Volt (VDD and VDDQ), DDR5 Registered (RDIMM), Double Data Rate (DDR), Synchronous DRAM Dual In-Line Memory Modules (DIMM). These Registered DDR5 SDRAM DIMMs are intended for use in server, workstation, and database environments. Committee(s): JC-45, JC-45.1 Free download. Registration or login required.
DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card D Annex Release Number: Version 2.00	JESD305-R8-RCD	Feb 2025
This standard, JESD305-R8-RCD, DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card D Annex, defines the design detail of x8, 1 Package Rank DDR5 RDIMM with 8-bit ECC. The common feature of DDR5 RDIMM, such as the connector pinout, can be found in the JESD305, DDR5 Registered Dual Inline Memory Module (RDIMM) Common Standard. Committee(s): JC-45, JC-45.1 Free download. Registration or login required.
DDR5 Clocked Small Outline Dual Inline Memory Module (CSODIMM) Common Standard Release Number: Version 1.1	JESD324A	Feb 2025
This standard defines the electrical and mechanical requirements for 262-pin, 1.1 V (VDD), Clocked Small Outline, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR5 SDRAM CSODIMMs). These DDR5 CSODIMMs are intended for use as main memory when installed in Computers, laptops and other systems. Committee(s): JC-45, JC-45.3 Free download. Registration or login required.
DDR5 Clocked Unbuffered Dual Inline Memory Module with 4-bit ECC (EC4 CUDIMM) Raw Card E Annex Release Number: Version 1.00	JESD323-B4-RCE	Feb 2025
This annex, JESD323-B4-RCE, “DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Raw Card E Annex" defines the design detail of x8, 2 Package Ranks DDR5 CUDIMM. The common feature of DDR5 CUDIMM such as the connector pinout can be found in the JESD323, DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Common Standard. Committee(s): JC-45, JC-45.3 Free download. Registration or login required.
DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Common Standard Release Number: Version 1.1	JESD323A	Feb 2025
This standard defines the electrical and mechanical requirements for 288-pin, 1.1 V (VDD), Clocked, Unbuffered, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR5 SDRAM CUDIMMs). These DDR5 Clocked Unbuffered DIMMs (CUDIMMs) are intended for use as main memory when installed in Computers. Committee(s): JC-45, JC-45.3 Free download. Registration or login required.
DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card A Annex Release Number: Version 2.00	JESD305-R8-RCA	Feb 2025
This annex, JESD305-R8-RCA, DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card A Annex, defines the design detail of x4, 2 Package Rank DDR5 RDIMM with 8-bit ECC. The common feature of DDR5 RDIMM, such as the connector pinout, can be found in the JESD305, DDR5 Registered Dual Inline Memory Module (RDIMM) Common Standard. Committee(s): JC-45, JC-45.1 Free download. Registration or login required.
DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Raw Card B Annex Release Number: Version 1.00	JESD323-A0-RCB	Feb 2025
This annex, JESD323-A0-RCB, “DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Raw Card B Annex", defines the design detail of x8, 2 Package Ranks DDR5 CUDIMM. The common feature of DDR5 CUDIMM such as the connector pinout can be found in the JESD323, DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Common Standard. Committee(s): JC-45, JC-45.3 Free download. Registration or login required.
DDR5 Clocked Small Outline Dual Inline Memory Module (CSODIMM) Raw Card B Annex Release Number: Version 1.00	JESD324-V0-RCB	Feb 2025
This annex JESD324-V0-RCB, “DDR5 Clocked Small Outline Dual Inline Memory Module with 0-bit ECC (EC0 CSODIMM) Raw Card B Annex" defines the design detail of x8, 2 Package Ranks DDR5 NECC Clocked SODIMM. The common feature of DDR5 CSODIMM such as the connector pinout can be found in the JESD324, DDR5 Clocked Small Outline Dual Inline Memory Module (CSODIMM) Common Standard. Committee(s): JC-45, JC-45.3 Free download. Registration or login required.
DDR5 Small Outline Dual Inline Memory Module (SODIMM) Common Standard Release Number: Version 1.1	JESD309A	Feb 2025
This standard defines the electrical and mechanical requirements for 262-pin, 1.1 V (VDD), Small Outline, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR5 SDRAM SODIMMs). These DDR5 SODIMMs are intended for use as main memory when installed in Computers, laptops and other systems. Committee(s): JC-45, JC-45.3 Free download. Registration or login required.

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JEDEC Education Series: Memory, Mobile & Modules