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16GB RAM Replacement for Hynix HMA42GR7AFR4N-VK, HMA42GR7BJR4N-VK | DDR4 2666MHz PC4-21300 ECC RDIMM 2Rx4 Server Memory
- 16GB ( 1x 16GB Module ) | DDR4 2666 MHz ( PC4-21300 ) | DDR4 DIMM ( 288-Pin ) | ECC RDIMM ( Registered DIMM ) | 1.2V - DDR4 Standard Voltage
- Compatible Equivalent for Hynix HMA42GR7AFR4N-VK, HMA42GR7BJR4N-VK
- High performance Memory RAM upgrade designed for Server/Workstation Systems
- All modules undergo quality assurance testing to ensure dependable and reliable performance | Please verify the supported memory (RAM) specifications of your system prior to purchase to ensure compatibility
- A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase
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Overview
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An A-Tech Memory (RAM) upgrade is an easy, quick way to boost your system's performance by speeding up loading times, improving system responsiveness, and increasing your system's ability to handle higher workloads. Take on more and multitask with ease with a simple and affordable A-Tech Memory upgrade!
Compatible Memory Module Replacement for Hynix:
HMA42GR7AFR4N-VK
HMA42GR7BJR4N-VK
Memory Specs
Memory Size: 16 GB ( 1 x 16 GB Module )
Memory Type: DDR4
Form Factor: DIMM ( 288 Pin )
Speed: DDR4 2666 MHz ( PC4-21300 )
ECC Type: ECC RDIMM ( Registered DIMM )
Voltage: 1.2V
Ensured Reliability
All A-Tech Memory products are rigorously tested to ensure that your memory meets our stringent quality and performance standards.
Lifetime Warranty
Purchase with confidence knowing that all A-Tech orders are backed with our Lifetime Warranty.
US Based Technical Support
Need help? Have questions? Our 5 star United States based support team is here to help before, during, and after your purchase to make sure you are completely satisfied with your A-Tech Memory!
Compatible Memory Module Replacement for Hynix:
HMA42GR7AFR4N-VK
HMA42GR7BJR4N-VK
Memory Specs
Memory Size: 16 GB ( 1 x 16 GB Module )
Memory Type: DDR4
Form Factor: DIMM ( 288 Pin )
Speed: DDR4 2666 MHz ( PC4-21300 )
ECC Type: ECC RDIMM ( Registered DIMM )
Voltage: 1.2V
Ensured Reliability
All A-Tech Memory products are rigorously tested to ensure that your memory meets our stringent quality and performance standards.
Lifetime Warranty
Purchase with confidence knowing that all A-Tech orders are backed with our Lifetime Warranty.
US Based Technical Support
Need help? Have questions? Our 5 star United States based support team is here to help before, during, and after your purchase to make sure you are completely satisfied with your A-Tech Memory!
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
- CONTACT
Return Policies
- Return for refund within: 30 days
- Return for replacement within: 30 days
- This item is covered by A-Tech Return Policy
Manufacturer Contact Info
- For a directory of all our manufacturers, please click below.
- Manufacturers Directory
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The A-Tech 16GB DDR4-2666 ECC Registered DIMM is a single-module server memory upgrade for servers and workstations that support 288-pin PC4-21300, 1.2V, 2Rx4 RDIMMs, including systems compatible with the listed Hynix equivalents.
Recommended For
- Server operators adding memory headroom for databases or other concurrent workloads, when their DDR4 platform specifically supports ECC RDIMMs and its memory-population rules allow this 16GB module.
- Homelab and NAS maintainers upgrading a compatible DDR4-2666 RDIMM server in measured steps, rather than replacing the system or buying a full memory kit.
- IT technicians or refurbishers replacing a failed 16GB DDR4 ECC RDIMM in a server whose manufacturer supports the module’s type, speed, capacity, and rank.
Real-World Use Scenarios
- When a compatible server is short on memory, add this module as part of a supported configuration; the extra capacity can give the operating system and applications more room before memory pressure becomes a constraint.
- For a virtualization host running several VMs, add memory when guest allocations are limiting how many workloads can run together; the additional capacity can ease memory contention, though the benefit depends on the host’s total RAM and workload.
- For a home lab running network-simulation VMs, add memory when the lab is constrained by the RAM available to its virtual machines; this can provide room for larger or additional simulations, subject to the server’s overall capacity.
- For a small development or test database server, add compatible memory if the current setup is limiting the database’s working capacity; it may help the workload, but one 16GB module is an incremental upgrade, not a guarantee of faster queries.
- When replacing a missing or failed DIMM in a supported server, use it only if the system’s memory guide allows this module type and configuration; the goal is to restore usable memory, not to upgrade an incompatible desktop.