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Eight green DDR3 DIMMs with gold contacts, no heat spreaders

A-Tech

A-Tech 128GB (8 x 16GB) DDR3 1600 RDIMM ECC Registered Memory Upgrade for HP Z420 Z620 Z820

SKU CH-RVES-ZRM3V

Eight 16 GB DDR3-1600 registered ECC modules delivering 128 GB for HP Z420, Z620 and Z820 workstations

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeRegistered

Capacity 128GB (8 x 16GB)

  • 128 GB maximum capacity using eight 16 GB modules
  • DDR3 1600 MHz RDIMM with CL11 latency for stable throughput
  • ECC registered design protects data integrity on Z420 Z620 Z820
  • 50 V operation matches factory power requirements
  • 240 pin dual rank x4 layout fits workstation memory slots

HP Z420 Z620 Z820 max-capacity kit

This 128GB kit fills every DIMM slot on second-generation HP Z Workstation Z420, Z620 and Z820 models. It is built for professionals who need the highest supported memory capacity for virtualisation, rendering or large-dataset workloads on these specific platforms. Buyers who want more storage or a different memory generation will not be served by this product.

Registered ECC DDR3 1600 2Rx4 specification

The modules are DDR3 1600 (PC3-12800) RDIMMs with ECC, 2Rx4 organisation and 1.50V operation. This exact combination of registered buffering, error correction, dual-rank x4 layout and voltage is what the Z420, Z620 and Z820 memory controller expects for full 128GB operation. Mixing with unbuffered ECC UDIMMs is not supported.

Eight-module installation follows manual channel

Installation means placing all eight 240-pin DIMMs into the correct channels as shown in the workstation service manual. The most common issue is populating slots in the wrong order, which prevents the system from recognising the full 128GB or forces a slower speed. No heat spreaders are fitted, so clearance is standard.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $459.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 128 GB (8 × 16 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $3.59 per GB
Cheaper than about 87% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameA-Tech
Product line2nd Gen. HP Z Workstation Compatible
Model name128 GB (8 × 16 GB) 2Rx4 PC3-12800 RDIMM for HP Z Workstation Z420, Z620, Z820 (Max Memory)
Part numberNE-MS-0099
Total capacity128 GB (8 × 16 GB)
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1600 (PC3 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsHP Z Workstation Z420, Z620, Z820
In the box
Included itemsEight Modules
More details
VariantCompatible with HP Z Workstation Z420, Z620, Z820

Other versions of this model

5 more in the same range

Questions about this item

What does the 128GB total capacity mean for my HP Z420, Z620 or Z820 workstation?

This kit fills all available DIMM slots to reach the maximum supported memory, letting the workstation handle large datasets, virtual machines and multi-application workloads without paging to disk.

How does the PC3-12800R rating affect real-world speed in these workstations?

The modules run at DDR3 1600MHz; the registered buffer adds one cycle of latency, so the system operates at the rated 1600MHz transfer rate while maintaining signal integrity across all eight slots.

Will the 240-pin registered DIMMs fit the memory sockets on my Z420, Z620 or Z820?

Yes, each module uses the standard 240-pin DDR3 RDIMM form factor with 2Rx4 organisation, matching the workstation's registered memory slots and allowing all eight to be installed simultaneously.

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