OWC 64GB (8 x 8GB) P DDR4 ECC Registerd CL21 PC4-21300 2666MHz SDRAM Memory Ram Upgrade Module Compatible with 2019 Mac Pro 8-Core (Model ID: MacPro7,1) (OWC2666R8M64)
This OWC 64GB (8x8) 2666MHz DDR4 ECC desktop kit is $991.31 ($15.49/GB). In stock on Amazon. Fits Intel 11th Gen Core (LGA1200) and Intel 12th / 13th / 14th Gen (LGA1700) and more.
Type
DDR4
Capacity
64GB (8x8)
Speed
2666MHz
Price
$991.31
Current price
$991.31$15.49/GBAs of 04:15 UTC ยท Verify on Amazon ยท Price subject to change
$15.49/GB
Track vs similar 64GB (8x8) DDR4 kits
As an Amazon Associate I earn from qualifying purchases. Prices as of 04:15 UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
OWC
OWC 64GB (8 x 8GB) P DDR4 ECC Registerd CL21 PC4-21300 2666MHz SDRAM Memory Ram Upgrade Module Compatible with 2019 Mac Pro 8-Core (Model ID: MacPro7,1) (OWC2666R8M64)
This OWC 64GB (8x8) 2666MHz DDR4 ECC desktop kit is $991.31 ($15.49/GB). In stock on Amazon. Fits Intel 11th Gen Core (LGA1200) and Intel 12th / 13th / 14th Gen (LGA1700) and more.
At a Glance
Strengths
- Compatible with 5 CPU platforms
Limitations
- Limited review data โ only 1 Amazon reviews
- Limited price history โ recently added to tracking, trends not yet available
- Requires ECC-compatible CPU and motherboard โ not supported on most consumer platforms
All points are derived from price data, customer ratings, and product specifications โ not editorial opinion. Updated daily.
Cheaper Alternatives
Same 64GB DDR4 โ lower $/GB than this product
72% cheaper/GB
72% cheaper/GB
A-Tech
A-Tech 64GB DDR4 2400MHz PC4-19200 ECC LRDIMM 4Rx4 (4DRx4) Quad Rank 1.2V Load Reduced DIMM 288-Pin Server RAM Memory Upgrade Module (A-Tech Enterprise Series)71% cheaper/GB
Ranked by lowest $/GB. Same 64GB DDR4 DIMM only. Prices updated daily.
Specifications
Catalog data as of 04:15 UTC
Memory TypeDDR generation (DDR4 vs DDR5) ยท guide | DDR4 |
CapacityTotal kit memory size ยท guide | 64GB (8x8) |
| Kit Config | โ 8ร kit โ dual-channel ready |
SpeedFrequency in MT/s or MHz ยท guide | 2666MHz |
CAS LatencyClock cycles response delay ยท guide | CL21 |
True LatencyAbsolute nanosecond latency | 15.75 ns(High latency)= (21 ร 2000) รท 2666 |
ECCError-correcting capability ยท guide | Yes |
ASIN | B0B4RBPP84 |
Spotted a wrong price or spec? Report a data correction ยท How we verify data
Specs & prices refreshed 04:15 UTC. Verify on Amazon at checkout.
Price History
Updated daily โ track price trends over time
Current
$991.31
106d Low
$991.31
106d High
$991.31
106d Avg
$991.31
vs this kit's history
Current price is 1.0ฯ above the tracked average of $991.31 - within a normal band for this ASIN.
Frequently Asked Questions
Is the OWC 64GB (8x8) 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 1000โ5000 (AM4) and 1 more platforms. 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 $991.31 ($15.49/GB), this module is priced near its 64GB (8x8) DDR4 peer median. Check the price history chart above for trend context.
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 โ 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 99 modules tracked with an average customer rating of 4.4โ . Browse all OWC modules or use the comparison tool to see how it stacks up against Corsair, G.Skill, Kingston, and Crucial.
Is a 8ร8GB kit better than a single stick?
This is already a 8ร8GB kit (quad-channel capable) โ the correct configuration for maximum bandwidth on supported platforms. Matched multi-stick kits use multiple memory channels simultaneously, improving real-world performance versus a single stick of the same total capacity.
Similar DDR4 RAM
NEMIX RAM
NEMIX RAM 64GB (8X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory KIT
NEMIX RAM
NEMIX RAM 64GB (8X8GB) DDR4 2666MHz PC4-21300 1Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory KIT
A-Tech
A-Tech 16GB DDR4 2400 MHz UDIMM PC4-19200 (PC4-2400T) CL17 DIMM 2Rx8 Non-ECC Desktop RAM Memory Module
Compatibility & buying details
Use cases, platforms, motherboard notes, upgrade math, and analyst notes
Compatibility & buying details
Use cases, platforms, motherboard notes, upgrade math, and analyst notes
Is This RAM Right for You?
Based on 64GB (8x8) DDR4 ECC DIMM specifications.
ECC RAM is not supported on gaming platforms (consumer CPUs/boards)
ECC RAM requires server-grade hardware โ not compatible with standard office PCs
ECC RAM protects long renders from silent data corruption โ ideal for professional workstations
ECC RAM detects and corrects memory errors โ required for data-critical servers and ZFS storage
This is a desktop DIMM โ laptop upgrades require SO-DIMM modules. See Laptop RAM Prices for compatible options.
Verdicts based on capacity, form factor, and ECC specifications โ not editorial opinion. Capacity recommendations reflect 2026 software requirements.
Enterprise ECC Stability
Validated by C.R. Vinoth Kumar ยท 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.
Speed Ranking
Top 46%
2666MHz ranks in the top 46% of all DDR4 speeds tracked (2,032 modules).
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 | $8.10/GB |
| 16GB | $7.81/GB |
| 32GB | $7.48/GB |
| 64GBThis product | $7.81/GB |
| 128GB | $7.42/GB |
Also available from OWC
Same brand, different configurations
OWC
OWC 64GB (2x32GB) DDR4 3200MHz ECC UDIMM 288-pin Memory RAM
OWC
OWC 128GB (4x32GB) DDR4 3200MHz ECC UDIMM 288-pin Memory RAM
OWC
OWC 32GB (2x16GB) DDR4 3200MHz ECC UDIMM 288-pin Memory RAM
Related pages
Amazon prices on this page. ASIN B0B4RBPP84 may also appear on Newegg - we do not show competitor prices.
Reviewed by C.R. Vinoth Kumar
Editor & FounderVinoth is an InfoSec consultant, independent technical blogger, and the developer of RAM Prices, with 12+ years in IT. He reviews buying guides and maintains the site's automated checks for price per GB, specification confidence, availability, and AMD/Intel platform compatibility. See the methodology for the exact ranking rules and limitations.
As an Amazon Associate I earn from qualifying purchases. Prices as of 04:15 UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.