OWC
OWC 16GB DDR4 2666MHz PC4-21300 CL19 2RX8 ECC Unbuffered UDIMM 1.2V 288-pin Workstation Server Memory RAM
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.
Buy on AmazonProduct prices and availability are accurate as of the date of the last daily update and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product. Affiliate link.
At a Glance
Strengths
- +Compatible with 4 CPU platforms
Limitations
- −Limited review data — only 11 Amazon reviews
- −Limited price history — recently added to tracking, trends not yet available
- −Requires ECC-compatible CPU and motherboard — not supported on most consumer platforms
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 DIMM specifications.
ECC RAM is not supported on gaming platforms (consumer CPUs/boards)
ECC RAM requires server-grade hardware — not compatible with standard office PCs
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
This is a desktop DIMM — laptop upgrades require SO-DIMM modules. See Laptop RAM Prices for compatible options.
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 | DIMM |
| ECC | Yes |
| Voltage | 1.2V |
| ASIN | B0CBT49ZRT |
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 32GB (2X16GB) DDR4 RAM Compatible with Synology DiskStation DS723+ and DS923+ NAS System 2666MHz PC4-21300 CL19 ECC Unbuffered SODIMM 2Rx8 1.2V Memory Upgrade
OWC
OWC 64GB (2x32GB) DDR4 3200MHz PC4-25600 CL22 2RX8 ECC Unbuffered UDIMM 1.2V 288-pin Workstation Server Memory RAM
OWC
OWC 128GB (4x32GB) DDR4 3200MHz PC4-25600 CL22 2RX8 ECC Unbuffered UDIMM 1.2V 288-pin Workstation Server Memory RAM
Related pages
Frequently Asked Questions
Is the OWC 16GB 2666MHz DDR4 compatible with my motherboard?
This module is compatible with Intel 11th Gen Core (LGA1200), Intel 12th / 13th / 14th Gen (LGA1700), Intel Core X / Skylake-X (LGA2066 / X299), AMD Ryzen 1000–5000 (AM4). 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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