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OWC 256GB (4x64GB) DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC Registered RDIMM Memory RAM Module Upgrade Kit Compatible with HP Workstation Z6 G5 A
OWC

OWC 256GB (4x64GB) DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC Registered RDIMM Memory RAM Module Upgrade Kit Compatible with HP Workstation Z6 G5 A

Bottom line: The OWC 256GB (4x64GB) DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC is a specs-and-price decision rather than a crowd-consensus one in the memory (ram) category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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Mike Perry — Hardware researcher since 2014. For desktop and laptop memory upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Backed by OWC's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

About this item ECC REGISTERED UPGRADE: This type of memory is used in Workstations and Servers. It will NOT be compatible with standard desktop computers. Also, it cannot be mixed with UNBUFFERED -or- ECC LOAD REDUCED memory. OWC 256GB UPGRADE: Consists of 4pcs of 64GB DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC Registered DIMM Memory RAM Module Upgrade Kitcompatible with HP Workstation model Z6 G5 A. INDUSTRY LEADING: Consumer-friendly Advanced Replacement Program and Limited Lifetime Warranty, which includes Free Tech Support by Other World Computing. MAXIMIZE YOUR SERVER: With OWC's…

SpecPicks Verdict

SpecPicks scored OWC 256GB (4x64GB) DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC… using a rating × review-volume × price-fit model applied to published specs and reviews across the memory (ram) category. OWC's memory (ram) lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for memory (ram) of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • ECC REGISTERED UPGRADE This type of memory is used in Workstations and Servers. It will NOT be compatible with standard desktop computers. Also, it cannot be mixed with UNBUFFERED -or- ECC LOAD REDUCED memory.
  • OWC 256GB UPGRADE Consists of 4pcs of 64GB DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC Registered DIMM Memory RAM Module Upgrade Kitcompatible with HP Workstation model Z6 G5 A.
  • INDUSTRY LEADING Consumer-friendly Advanced Replacement Program and Limited Lifetime Warranty, which includes Free Tech Support by Other World Computing.
  • MAXIMIZE YOUR SERVER With OWC's ECC Registered Server Memory, you will extend the life of your old infrastructure or save money when building a new one.
  • Replacement for HP part number 760R8AA, P64707-B21, P64707-K21, Samsung part number M321R8GA0PB0-CWM, and Hynix part numbers HMCG94AGBRA177N and HMCG94AGBRA181N.

Full Specifications

UPC810159627986
ASINB0D96XY2LY
BrandOWC
Voltage1.1 Volts (DC)
RAM Size256 GB
Model NameOWC 256GB (4x64GB) DDR5 5600
Form FactorWorkstation Server
ManufacturerOther World Computing
Memory Speed5600 MHz
Model NumberOWC 256GB (4x64GB) DDR5 5600
Number of Pins288
Compatible DevicesHP Workstation Z6 G5 A
Additional FeaturesName Brand Components
Computer Memory Size256 GB
Warranty DescriptionOWC Memory Lifetime Limited Warranty including Advanced Replacement Program
RAM Memory TechnologyDDR5 5600
Column Address Strobe Latency46

Ready to buy?

OWC 256GB (4x64GB) DDR5 5600 PC5-44800 CL46 2Rx4 288-pin 1.1V ECC Registered RDIMM Memory RAM Module Upgrade Kit Compatible with HP Workstation Z6 G5 A is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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