OWC
OWC 16GB DDR4 2666MHz PC4-21300 CL19 2RX8 ECC Unbuffered SODIMM 1.2V 260-pin Memory RAM Compatible with Synology D4ECSO-2666-16G, D4ES01-16G
Current price
$159.99
$10.00/GB
As of Apr 14, 2026 · Verify on Amazon · Price subject to change
Deal score
66/100
At $10.00/GB — DDR4 market rate.
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At a Glance
Limitations
- −Limited review data — only 45 Amazon reviews
- −Limited price history — recently added to tracking, trends not yet available
All points are derived from price data, customer ratings, and product specifications — not editorial opinion. Updated daily.
Is This RAM Right for You?
Based on 16GB DDR4 ECC SO-DIMM specifications.
Laptop RAM — suitable for gaming laptops with compatible slots
16GB handles office apps, video calls, and multiple browser tabs comfortably
ECC RAM protects long renders from silent data corruption — ideal for professional workstations
ECC RAM detects and corrects memory errors — required for data-critical servers and ZFS storage
SO-DIMM form factor — correct type for laptop memory upgrades. Verify your laptop has an accessible slot.
Verdicts based on capacity, form factor, and ECC specifications — not editorial opinion. Capacity recommendations reflect 2026 software requirements.
Price History
Updated daily — track price trends over time
Speed Ranking
Top 46%
2666MHz ranks in the top 46% of all DDR4 speeds tracked (1,762 modules).
Specifications
| Memory Type | DDR4 |
| Capacity | 16GB |
| Speed | 2666MHz |
| CAS Latency | CL19 |
| Form Factor | SO-DIMM |
| ECC | Yes |
| ASIN | B0CBTDLN39 |
Compatible Platforms
Always verify with your motherboard's QVL before purchasing.
DDR4 Price by Capacity
Average $/GB across all DDR4 modules in the database
| Capacity | Avg $/GB |
|---|---|
| 8GB | $9.97/GB |
| 16GBThis product | $9.79/GB |
| 32GB | $9.33/GB |
| 64GB | $9.33/GB |
| 128GB | $8.96/GB |
Also available from OWC
Same brand, different configurations
OWC
OWC 64GB (2x32GB) DDR4 3200MHz PC4-25600 CL22 2RX8 Non-ECC SODIMM 1.2V 260-pin Laptop Memory RAM
OWC
OWC 32GB DDR4 3200MHz PC4-25600 CL22 2RX8 Non-ECC SODIMM 1.2V 260-pin Laptop Notebook Memory RAM Upgrade Module
OWC
OWC 32GB (2x16GB) DDR4 2400MHZ PC4-19200 CL17 2RX8 Non-ECC SODIMM 1.2V 260-pin Laptop Notebook Memory RAM Upgrade Module
Frequently Asked Questions
Is the OWC 16GB 2666MHz DDR4 compatible with my motherboard?
This module is compatible with Laptop — DDR4 SO-DIMM. Always verify with your motherboard's QVL (Qualified Vendor List) before purchasing, as compatibility can vary by board revision.
Is this DDR4 module a good deal right now?
At $159.99 ($10.00/GB), this module is priced near the DDR4 market average. Check the price history chart above to see if prices have been trending up or down recently.
What is 2666MHz RAM used for?
This is an ECC (Error-Correcting Code) RAM module designed for servers, workstations, and NAS systems where data integrity is critical. ECC RAM detects and corrects single-bit memory errors automatically. It requires a compatible CPU and motherboard — most consumer platforms do not support ECC. See our ECC RAM guide for platform compatibility details.
How does OWC RAM compare to other brands?
OWC has 82 modules tracked with an average customer rating of 4.4★. This specific module is 1% below the overall DDR4 market average $/GB. Browse all OWC modules or use the comparison tool to see how it stacks up against Corsair, G.Skill, Kingston, and Crucial.
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