DDR3 ECC UDIMM Server, Workstation, NAS Memory

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DDR3 ECC UDIMM (ECC unbuffered DIMM) is the error-correcting memory for DDR3-era entry servers, single-socket workstations and business NAS: systems that need ECC protection but do not use registered memory. Each module is a 240-pin unbuffered DIMM with a 72-bit ECC data path (64 data bits plus 8 check bits), so the system can detect and correct single-bit memory errors that non-ECC desktop memory would pass through.

What is on this page

4GB and 8GB modules at DDR3 1333MHz (PC3-10600), 1600MHz (PC3-12800) and 1866MHz (PC3-14900), in standard 1.5V and low-voltage DDR3L 1.35V versions, as single modules and matched kits up to 64GB (8x8GB). 8GB is the largest standard DDR3 ECC UDIMM. Many listings are matched to an OEM part number: Supermicro MEM-DR380L, SK hynix HMT41GU7, Samsung M391B1G73, Dell SNP, QNAP RAM-4GDR3EC-LD-1600 and RAM-8GDR3EC-LD-1600, and ASUSTOR AS7R-RAM4GEC and AS7R-RAM8GEC. Searching your part number at the top of the page is the fastest way to find them.

Where DDR3 ECC UDIMM is used

System-matched listings on this page include Dell PowerEdge T620, R415, R515, M620, FM120, C6100, C6105, C6220 and C6220 II, and ASUSTOR AS7009RDX and AS7012RDX rackmount NAS. Other listings follow the part numbers used in Supermicro entry server boards and in QNAP and ASUSTOR business NAS.

Before you order

ECC UDIMM is not interchangeable with registered memory (RDIMM). A board designed for one will not run the other, and the two cannot be mixed.
DDR3L modules run at 1.35V and also at 1.5V, so they work in standard DDR3 slots. A system that requires 1.35V needs DDR3L.
ECC operates only when the processor and board support it. In a non-ECC system the module may work, but without error correction.
Use one module size and speed per system, installed in matched pairs or sets.

Fleet and volume orders

NEMIX RAM is a US-based server memory specialist, in business since 1993. Every module is researched, matched, and compatibility-tested by NEMIX RAM, is JEDEC-compliant, and is backed by a lifetime warranty. Purchase orders, net terms and volume pricing are available for IT departments, schools, government buyers and resellers keeping DDR3 systems in service. Request a quote, or send us your system model or part number and we will confirm the right module before you order.

More ECC UDIMM: DDR4 ECC UDIMM · DDR5 ECC UDIMM · all ECC UDIMM