OWC
OWC 4GB Replacement for Synology D4NS01-4G - DDR4, D4NESO-2666-4G 2666 PC4-21300 CL19 1Rx8 260-pin 1.2V SODIMM Memory RAM Module Upgrade
Current price
$35.99
$9.00/GB
As of Apr 14, 2026 · Verify on Amazon · Price subject to change
vs avg $/GB
11% cheaper
Deal score
80/100
At $9.00/GB — 11% 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
- +11% below the overall DDR4 market average $/GB
Limitations
- −Limited review data — only 6 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 4GB DDR4 SO-DIMM specifications.
Laptop RAM — suitable for gaming laptops with compatible slots
4GB is below the recommended minimum for comfortable everyday use
4GB is insufficient for video editing or 3D rendering workloads
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
Specifications
| Memory Type | DDR4 |
| Capacity | 4GB |
| CAS Latency | CL19 |
| Form Factor | SO-DIMM |
| ASIN | B0F1V7LQ7P |
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 |
| 128GB | $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
4GB
$35.99
$9.00/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 4GB 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 $9.00/GB, this module is 11% 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 DDR4 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.
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 11% 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
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4GB DDR4 3200MHz PC4-25600 1.2V 1R x 16 SODIMM Laptop RAM Memory Module M471A5244CB0