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Eight green DDR3 RDIMM modules in anti-static tray

A-Tech

A-Tech 64GB (8x8GB) DDR3 1600 RDIMM for HP Z420 Z620 Z820

SKU CH-GQHQ-TDN2Z

Eight registered ECC DDR3 modules add 64 GB at 1600 MHz for HP Z420, Z620 and Z820 workstations

  • Total capacity64 GB (8 × 8 GB)
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeRegistered

Capacity 64GB (8 x 8GB)

  • 64 GB capacity across eight modules handles heavy workloads
  • DDR3 1600 MHz speed accelerates data throughput
  • ECC registered design corrects errors for stability
  • 5 V operation matches workstation power requirements
  • Tested for HP Z420 Z620 Z820 compatibility

Targeted Workstation Upgrade

This 64GB kit delivers eight 8GB DDR3 1600 RDIMM modules built specifically for second-generation HP Z420, Z620 and Z820 workstations. ECC registered operation with 2Rx4 organisation protects data integrity in professional workloads. The 1.5V modules install directly into the 240-pin DIMM slots provided by these platforms.

Build Integration

Registered DIMM architecture requires a chipset and processor that support RDIMM signalling; the target workstations provide this natively. Mixing with unbuffered ECC modules is not supported, so all slots should be populated with matching registered parts. Eight modules fill the available channels on Z820 and maximise capacity on Z420 or Z620 configurations.

Upgrade Context

The kit replaces lower-capacity or mixed-speed DDR3 sets that limit multitasking headroom in memory-intensive applications. Moving to a full 64GB matched kit eliminates speed mismatches and rank inconsistencies that can force the system to run at reduced frequencies. The jump is worth it when workloads exceed the capacity of a partial population or when ECC registered reliability becomes a requirement.

How it compares

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

Price $112.99
Cheaper than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (8 × 8 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $1.77 per GB
Cheaper than about 94% 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 name64 GB (8 × 8 GB) 2Rx4 PC3-12800 RDIMM for HP Z Workstation Z420, Z620, Z820
Part numberNE-MS-0098
Total capacity64 GB (8 × 8 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 is the CAS latency of these DDR3 1600 RDIMMs?

The modules run at CL11 latency, which is the standard timing for DDR3 1600 registered memory.

How much power and heat will eight 1.5 V RDIMMs add to a Z420 running continuously?

Each module operates at 1.50 V; total power draw depends on workload but registered DIMMs typically run cooler than high-density unbuffered kits.

Does my HP Z620 need a specific BIOS revision or CPU stepping to recognise all 64 GB?

The kit is validated for 2nd Gen HP Z Workstations Z420, Z620 and Z820; consult the system manual for memory seating and channel guidelines.

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