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Eight green DDR5 RDIMM sticks in a row

NEMIX RAM

NEMIX RAM 512GB (8x64GB) DDR5 5600 CL46 2Rx4 1.1V ECC RDIMM Lenovo SR685a V3 memory upgrade

SKU CH-GNM9-5QS84

Eight 64 GB DDR5 registered ECC RDIMMs at 5600 MT/s CL46, 1.1 V, validated for Lenovo ThinkSystem SR685a V3 servers

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from eight 64 GB modules
  • DDR5 5600 speed with PC5-44800 bandwidth rating
  • ECC registered design detects and corrects data errors
  • 2Rx4 dual-rank architecture maximises density per DIMM
  • 1 V operation lowers power draw in Lenovo SR685a V3

Lenovo SR685a V3 512GB DDR5 kit

This 512GB kit contains eight 64GB DDR5 5600 CL46 registered ECC RDIMMs built for the Lenovo ThinkSystem SR685a V3 rack server. Each module runs at 1.1V with a 2Rx4 organisation and 288-pin DDR5 form factor. The kit is validated for that specific platform and supplies 512GB of registered ECC capacity in a single package.

Suited for SR685a V3 memory expansion.

Administrators expanding a Lenovo SR685a V3 with the full 512GB supported by this part number will find the kit matches the required speed, voltage and rank configuration. Systems that need a different capacity, a non-ECC layout or a slower DDR5 data rate should select a kit qualified for those exact requirements.

Registered ECC RDIMM requirement decides fit

The modules are registered ECC RDIMMs, so the server memory controller must support registered error-correcting DIMMs. If the target platform only accepts unbuffered or non-ECC DDR5, these sticks will not function.

How it compares

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

Price $15,248.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $29.78 per GB
Pricier than about 85% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR5 5600 MHz ECC RDIMM Registered Server Memory
Part numberMR44800-924K8
Total capacity512 GB (8 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items512 GB (8 × 64 GB) DDR5 5600 MHz PC5-44800 2Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 2Rx4 288-pin RDIMM modules ever need replacement beyond reseating them?

The modules are solid-state with no moving parts; under normal server operation they do not require scheduled replacement, only reseating if a slot loses contact.

What electrical limit appears first when all eight 64 GB sticks run at 5600 MT/s continuously?

The 1.10 V supply rail and the registered buffer on each 2Rx4 module set the sustained power ceiling before thermal limits are reached.

How much heat and fan noise should I expect from the 512 GB kit in a Lenovo SR685a V3 running 24/7?

Bare DDR5 RDIMMs without spreaders rely on chassis airflow; the SR685a V3’s standard fan profile keeps module temperatures within spec with no audible increase over baseline.

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