Supermicro

Supermicro 64GB DDR4-2666 ECC LRDIMM

B07DFLTWN3
Supermicro DDR4 LRDIMMmemory64GBDDR4-2666LRDIMM
$6.23/GB
$399.00
newIn Stock
This offer: sold by Aventis Systems · Amazon says New / Unknown
Prices refresh about once a day
Price updated
Price accurate as of Oct 22, 2026, 02:49 AM
Buy on Amazon

The Supermicro 64GB DDR4-2666 ECC LRDIMM is a 64GB DDR4 ECC server memory module in new condition. It is in stock at $399.00 - $6.23/GB.

Same capacity, other options
DriveInterfaceCond$/TBPrice
A-Tech 64GB DDR4-2933 ECC RDIMMDDR4-2933New$10580.16$661.26Buy on Amazon
Samsung 64GB DDR4-3200 ECC RDIMMDDR4-3200Refurb$12800.00$800.00Buy on Amazon
SK Hynix 64GB DDR4-3200 ECC RDIMMDDR4-3200New$13840.00$865.00Buy on Amazon
A-Tech 64GB DDR4-3200 ECC RDIMMDDR4-3200New$14656.80$916.05Buy on Amazon
Model context

Part of the Supermicro line we track.

Quick Verdict

Supermicro 64GB DDR4-2666 ECC LRDIMM at $6.23/GB. Warranty varies by seller. Verify your server's QVL before purchase.

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Specifications

Capacity64GB
Module TypeLRDIMM
GenerationDDR4
Speed2666 MT/s
ECCYes
Rank / Org—
Warranty—
ASINB07DFLTWN3
Market context

Against every other module we have an in-stock price for today, this one is cheaper per gb than 93% of them (37 of 40). The cheapest we can currently buy is $4.92/GB; the middle of the market is $12.25/GB.

Compare against every 0.0625TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 64GBDDR4-2666
#1Samsung 64GB DDR4-2666 ECC RDIMM
$6.23/GB
#2Supermicro 64GB DDR4-2666 ECC LRDIMMTHIS DRIVE
$6.23/GB
#3A-Tech 64GB DDR4-2666 ECC LRDIMM
$6.41/GB

Also appears in

Server memory
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AI storage

Frequently Asked Questions

Yes. At our last check it was $399.00 ($6,384.00 per terabyte at its 0.0625TB capacity), sold new under ASIN B07DFLTWN3. Amazon sets the final price at checkout.

This listing (B07DFLTWN3, ASIN B07DFLTWN3) carries no renewed, recertified, refurbished or pulled claim in its title, and Amazon reports it as new. On this site that is what "new" means: sold as factory-new.

This row (ASIN B07DFLTWN3) is stored as a DDR4 LRDIMM at DDR4-2666. A DDR4 module fits only a DDR4 platform (the keying and voltage differ by generation), and registered and unbuffered modules are not interchangeable - check your board's memory specification for DDR4 LRDIMM support.

Use Case Scenarios

🖥️
Virtualization Host Density
Proxmox, ESXi or Hyper-V host packing more VMs per socket.
✓ Excellent fit
RAM is the binding constraint on VM density long before CPU. Adding 64GB ECC modules lets a host carry more guests per socket, and ECC prevents a single bit-flip from corrupting a guest's memory.
💾
ZFS ARC Cache
TrueNAS or ZFS server where read performance depends on cache hit rate.
✓ Excellent fit
ZFS turns every spare gigabyte into ARC read cache — more RAM directly raises cache hit rates on active datasets. ECC is strongly recommended for ZFS, whose integrity guarantees assume trustworthy memory.
🗄️
Database Working Set
PostgreSQL, MySQL or in-memory analytics needing the working set resident.
✓ Excellent fit
Databases live or die on buffer pool size. Fitting the working set in memory converts disk reads into RAM reads — a latency improvement no storage upgrade matches. ECC protects against silent corruption in long-running instances.
🏠
Homelab ECC Upgrade
Home server or NAS build stepping up from consumer memory.
~ Good fit
For 24/7 homelab duty, ECC server memory at today's used/refurb prices is often cheaper per GB than new consumer RAM — with error correction included. Verify your board and CPU actually support ECC before buying.

Maintenance & Troubleshooting

Maintenance Checklist

On installRun a full memtest86+ pass
Boot memtest86+ and let it complete at least one full pass before trusting the module with production data. Catches infant-mortality defects and seating problems immediately.
On installVerify detected speed and channel population
Check BIOS/IPMI that the module runs at the expected MT/s and that channels are populated per the motherboard manual's DIMM order. Uneven population silently costs bandwidth.
MonthlyReview ECC error counters
Check IPMI/iDRAC/iLO event logs, or edac-util on Linux, for corrected ECC errors. Occasional corrected errors are normal; a climbing count on one DIMM predicts failure — replace it.
AnnuallyReseat and dust during maintenance windows
Airflow debris and socket oxidation cause intermittent errors. During planned downtime, blow out slots and reseat modules showing any corrected-error history.

Troubleshooting Guide

Cause: Unsupported module type (UDIMM vs RDIMM), wrong DDR generation, or incorrect slot population order.
Fix: Confirm the platform supports this exact type and generation (check the QVL), install in the manual's specified slot order, and reseat firmly until both latches click.