OWC
OWC 128GB (4x32GB) DDR4 2666MHz PC4-21300 CL19 2RX8 ECC Unbuffered SODIMM 1.2V 260-pin Memory RAM
Available Styles / Variations:
Enterprise ECC Stability
Validated by C.R. Vinoth Kumar · Founder & Senior Editor
This is an Error Correcting Code (ECC) server module designed to prevent silent data corruption in 24/7 server environments (like TrueNAS/ZFS or enterprise workloads). Ensure your motherboard and CPU officially support ECC before purchasing.
Current price
$838.49$6.55/GBAs of May 30, 2026 · Verify on Amazon · Price subject to change
$/GB vs DDR4 market avg
36% below avgDeal score
93/100
At $6.55/GB — 36% below the DDR4 market average.
Buy on AmazonLoad alertsVerify Alternative Stores
Our systems refresh prices daily from Amazon.com to secure the absolute lowest USD market rate. You can cross-reference this RAM kit (ASIN: B0CBTD7JBT) against alternative marketplaces like Newegg or Crucial before buying.
Product 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. As an Amazon Associate we earn from qualifying purchases.
At a Glance
Strengths
- 36% below the overall DDR4 market average $/GB
Limitations
- Limited review data — only 45 Amazon reviews
- Limited price history — recently added to tracking, trends not yet available
- Availability unconfirmed — may be out of stock or delisted
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 128GB (4x32) DDR4 ECC SO-DIMM specifications.
Laptop RAM — suitable for gaming laptops with compatible slots
128GB handles office apps, video calls, and multiple browser tabs comfortably
128GB handles 4K video editing on a laptop — 8K workflows may need a desktop workstation
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
Current
$838.49
4d Low
$838.49
4d High
$838.49
4d Avg
$838.49
Speed Ranking
Top 46%
2666MHz ranks in the top 46% of all DDR4 speeds tracked (1,546 modules).
Specifications
Memory TypeDDR generation (DDR4 vs DDR5) · guide | DDR4 |
CapacityTotal kit memory size · guide | 128GB (4x32) |
| Kit Config | ✓ 4× kit — dual-channel ready |
SpeedFrequency in MT/s or MHz · guide | 2666MHz |
CAS LatencyClock cycles response delay · guide | CL19 |
True LatencyAbsolute nanosecond latency | 14.25 ns(High latency)= (19 × 2000) ÷ 2666 |
Form FactorDIMM (Desktop) vs SO-DIMM (Laptop) · guide | SO-DIMM |
ECCError-correcting capability · guide | Yes |
VoltageOperating voltage level | 1.2V |
ASIN | B0CBTD7JBT |
Spotted a wrong price or spec? Report a data correction · How we verify data
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 | $9.68/GB |
| 16GB | $9.70/GB |
| 32GB | $9.02/GB |
| 64GB | $8.97/GB |
| 128GBThis product | $6.58/GB |
Also available from OWC
Same brand, different configurations
OWC
OWC 16GB 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 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 32GB (2x16GB) DDR4 2400MHZ PC4-19200 CL17 2RX8 Non-ECC SODIMM 1.2V 260-pin Laptop Notebook Memory RAM Upgrade Module
Related pages
Frequently Asked Questions
Is the OWC 128GB (4x32) 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 $6.55/GB, this module is 36% below the overall DDR4 market average $/GB across all capacities. Deal score: 93/100. Check the price history chart above to see how the price has moved recently. Prices are updated daily from Amazon.
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 89 modules tracked with an average customer rating of 4.4★. This specific module is 36% 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.
Is 128GB of RAM enough for gaming in 2026?
128GB is more than enough for gaming in 2026. Most AAA titles use 16–24GB alongside Discord and a browser. 128GB gives you headroom for streaming, recording, and running multiple applications simultaneously.
What is the difference between a single 128GB stick and a 2×64GB kit?
This is already a 4×32GB dual-channel kit — the correct configuration for maximum performance. Dual-channel mode doubles the memory bandwidth by using both memory channels simultaneously, improving performance in games and applications by 10–30% compared to a single stick of the same total capacity.
Similar DDR4 RAM
A-Tech
A-Tech 128GB Kit (4x32GB) RAM for Apple iMac 2019 & 2020 27 inch Retina 5K | DDR4 2666 MHz SODIMM PC4-21300 / PC4-21333 260-Pin SO-DIMM Max Memory Upgrade
OWC
OWC 128GB (4x32GB) DDR4 3200MHz PC4-25600 CL22 2RX8 ECC Unbuffered SODIMM 1.2V 260-pin Memory RAM
HP
Adamanta 128GB (4x32GB) Compatible for HP ZBook 17 G6/Gen6 Mobile Workstation Laptop DDR4 2666MHz PC4-21300 SODIMM 2Rx8 CL19 1.2v Notebook Memory Module Upgrade RAM
Expertly Curated by C.R. Vinoth Kumar
Lead Hardware AnalystC.R. Vinoth Kumar is a senior systems systems engineer and memory hardware architect with over 12 years of experience benchmarking computer components, building performance virtualization servers, and assembling local LLM inference rigs. Every memory module tracked in our database is mathematically checked using custom telemetry to isolate nanosecond CAS latency bounds, price-per-gigabyte market averages, and Ryzen/Intel platform pairings.
As an Amazon Associate we earn from qualifying purchases. Prices are updated daily and may change on Amazon.