OWC
OWC 128GB (4 x 32GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Upgrade Compatible with 27 iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DR4S128S)
Current price
$1,167.14
$9.12/GB
As of Apr 14, 2026 · Verify on Amazon · Price subject to change
vs avg $/GB
10% cheaper
Deal score
80/100
At $9.12/GB — 10% below the DDR4 market average.
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
- +10% below the overall DDR4 market average $/GB
Limitations
- −Limited review data — only 4 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 128GB DDR4 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
SO-DIMM laptop RAM is not used in servers — servers require DIMM or RDIMM modules
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 | 128GB |
| Speed | 2666MHz |
| Form Factor | SO-DIMM |
| ASIN | B07QD13Y17 |
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 |
| 16GB | $9.79/GB |
| 32GB | $9.33/GB |
| 64GB | $9.33/GB |
| 128GBThis product | $8.96/GB |
Upgrade Cost Calculator
How much more (or less) would you spend to step up or down in capacity? Prices shown are the cheapest available DDR4 SO-DIMM in each tier today.
Current
128GB
$1,167.14
$9.12/GB
Prices are the lowest available in each tier from our daily database — verify on Amazon before purchasing. Only DDR4 SO-DIMM modules compared.
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 128GB 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 $9.12/GB, this module is 10% below the overall DDR4 market average $/GB across all capacities. Deal score: 80/100. 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?
DDR4 RAM is used in Intel LGA1200/LGA1700 and AMD AM4 (Ryzen 1000-5000) systems. It offers excellent value for existing platforms. 2666MHz is a standard DDR4 speed tier.
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 10% 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.
Similar DDR4 RAM
OWC 128GB (4 x 32.0GB) 2400MHz DDR4 PC4-19200 SO-DIMM 260 Pin CL17 Memory Ram Module Upgrade (OWC2400DR4S128S)
Silicon Power
16GB KIT (2x8GB) DDR4 3200MHz (PC4-3200AA) PC4-25600 SODIMM Laptop RAM – 260-Pin 1.2V CL22 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One
HyperX
8GB DDR4 3200MHz (PC4-3200AA) PC4-25600 SODIMM Laptop RAM – 260-Pin 1.2V CL22 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One