Samsung

Samsung 16GB DDR4-2666 ECC RDIMM

M393A2K43DB2-CTD6Y
Samsung DDR4 RDIMMmemory16GBDDR4-2666RDIMM
No current price
newNot available
This offer: sold by A-Tech Components · Amazon says New / Unknown
Prices refresh about once a day
Price updated
Price accurate as of Oct 22, 2026, 04:20 AM
No current offer

The Samsung 16GB DDR4-2666 ECC RDIMM is a 16GB DDR4 ECC server memory module in new condition. It has no current offer on Amazon. The in-stock alternatives nearest its capacity are listed below.

In stock instead - nearest to 0.015625TB

6 in-stock listings · this listing has no current offer on Amazon · ranked by live cost per gb, refreshed about once a day

DriveCapacityCondition$/GBPrice
Micron 64GB DDR5-5600 ECC RDIMM
MTC40F2046S1RC56BD2
64GBNEW$46.14$2953Buy on Amazon
A-Tech 64GB DDR5-6400 ECC RDIMM
B0DYR9JXRH
64GBNEW$48.59$3110Buy on Amazon
A-Tech 96GB DDR5-4800 ECC RDIMM
B0DMC1VFNS
96GBNEW$41.15$3950Buy on Amazon
NEMIX 96GB DDR5-5600 ECC RDIMM
MTC40F204WS1RC56BB2R
96GBNEW$44.28$4251Buy on Amazon
NEMIX 96GB DDR5-6400 ECC RDIMM
MTC40F204WS1RC64BR
96GBNEW$45.51$4369Buy on Amazon
NEMIX 96GB DDR5-6400 ECC RDIMM
MTC40F204WS1RC64BC1R
96GBNEW$45.51$4369Buy on Amazon
Same capacity, other options
DriveInterfaceCond$/TBPrice
Samsung 16GB DDR4-2666 ECC RDIMMDDR4-2666Refurb$8959.36$139.99Buy on Amazon
Crucial 16GB DDR4-2400 ECC RDIMMDDR4-2400New$11519.36$179.99Buy on Amazon
Samsung 16GB DDR4-2666 ECC RDIMMDDR4-2666New$12354.56$193.04Buy on Amazon
Kingston 16GB DDR4-2666 ECC UDIMMDDR4-2666New$12736.64$199.01Buy on Amazon
Model context

Part of the Samsung line we track.

Quick Verdict

Samsung 16GB DDR4-2666 ECC RDIMM. Warranty varies by seller. Verify your server's QVL before purchase.

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Specifications

Capacity16GB
Module TypeRDIMM
GenerationDDR4
Speed2666 MT/s
ECCYes
Rank / Org—
Warranty—
ASINB07X9TV614
Market context

We do not have enough in-stock comparators of this type today to place this price against the rest of the market. The category page below ranks everything we do have.

Compare against every 0.015625TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 16GBDDR4-2666
#1Samsung 16GB DDR4-2666 ECC RDIMM
$8.75/GB
#2Samsung 16GB DDR4-2666 ECC RDIMM
$12.06/GB
#3Kingston 16GB DDR4-2666 ECC UDIMM
$12.44/GB
#4Samsung 16GB DDR4-2666 ECC RDIMMTHIS DRIVE
Out of stock

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Frequently Asked Questions

Not right now: Amazon shows no current offer for ASIN B07X9TV614. The in-stock alternatives nearest its 0.015625TB capacity are on this page, ranked by live price.

This listing (M393A2K43DB2-CTD6Y, ASIN B07X9TV614) 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 B07X9TV614) is stored as a DDR4 RDIMM 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 RDIMM 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 16GB 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.