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A-Tech 64GB Kit (2 x 32GB) for HP Z8 G4 Workstation - DDR4 PC4-21300 2666Mhz ECC Registered RDIMM 2Rx4 - Server Memory Ram Replacement for 850881-001 840758-091 815100-B21 (AT378314SRV-X2R4)
A-Tech

A-Tech 64GB Kit (2 x 32GB) for HP Z8 G4 Workstation

Bottom line: The A-Tech 64GB Kit for HP Z8 G4 Workstation is a specs-and-price decision rather than a crowd-consensus one in the workstations & creator desktops 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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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ Genuine A-Tech Brand Lifetime Warranty! Toll Free Technical Support
  • ✓ Backed by A-Tech's warranty and support channels

Cons

  • ✗ Check the listed dimensions, connectors and platform compatibility against your setup before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

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SpecPicks Verdict

SpecPicks scored A-Tech 64GB Kit for HP Z8 G4 Workstation using a rating × review-volume × price-fit model applied to published specs and reviews across the workstations & creator desktops category. A-Tech's workstations & creator desktops 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 workstations & creator desktops 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

  • 64GB Kit (2 x 32GB) DDR4 PC4-21300 2rx4 1.2v ECC Registered SERVER Memory Modules (288-pin DIMM 2666MHz)
  • WARNING! These modules are ECC REGISTERED! All modules in your system MUST be the same ECC Type in order to properly function.
  • Genuine A-Tech Brand Lifetime Warranty! Toll Free Technical Support
  • Designed for maximum compatibility and easy installation in to your HP Z8 G4 Workstation (Please verify the capabilities of your CPU)
  • Compatible Replacement for HP Genuine part number(s): 850881-001 - 840758-091 - 815100-B21

Full Specifications

BrandA-Tech
Voltage1.2 volts
RAM Size32 GB
Form Factor288-Pin
Memory Speed2666 MHz
Model NumberAT378314SRV-X2R4
Number of Pins288
Mfr Part NumberAT378314SRV-X2R4
Memory GenerationDDR4
Compatible DevicesServer
Memory Form FactorRDIMM
Additional FeaturesEcc, Lightweight, Registered Memory
Computer Memory Size32 GB
Warranty DescriptionLimited Lifetime Warranty Covering Defects In Materials And Workmanship
RAM Memory TechnologyDDR4
Column Address Strobe Latency15
Full listing titleA-Tech 64GB Kit (2 x 32GB) for HP Z8 G4 Workstation - DDR4 PC4-21300 2666Mhz ECC Registered RDIMM 2Rx4 - Server Memory Ram Replacement for 850881-001 840758-091 815100-B21 (AT378314SRV-X2R4)

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A-Tech 64GB Kit (2 x 32GB) for HP Z8 G4 Workstation - DDR4 PC4-21300 2666Mhz ECC Registered RDIMM 2Rx4 - Server Memory Ram Replacement for 850881-001 840758-091 815100-B21 (AT378314SRV-X2R4) 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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A-Tech 64GB Kit (2 x 32GB) for HP Z8 G4 Workstation - DDR4 PC4-21300 2666Mhz ECC Registered RDIMM 2Rx4 - Server Memory Ram Replacement for 850881-001 840758-091 815100-B21 (AT378314SRV-X2R4)
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