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Single green 288-pin DDR4 RDIMM module with black chips and silver edge contacts

OWC

OWC 256GB DDR4 3200 ECC Registered RDIMM QNAP TS-h2490FU

SKU CH-C64D-56T41

Single 256GB DDR4 3200 ECC registered RDIMM for QNAP TS-h2490FU servers

Capacity 256GB

  • 256GB single module expands server capacity
  • DDR4 3200 CL22 delivers registered ECC reliability
  • 8Rx4 octal-rank design maximises density per slot
  • 2V JEDEC standard keeps power draw low
  • Validated for QNAP TS-h2490FU workstation compatibility

Server-grade ECC RDIMM for QNAP TS-h2490FU

This 256 GB DDR4 3200 module is an ECC Registered DIMM built for the QNAP TS-h2490FU. It uses an 8Rx4 octal-rank layout at 1.2 V with CL22 timing and a 288-pin interface. The design targets workstations and servers that require registered ECC memory and cannot accept unbuffered or load-reduced modules.

Thermals noise and power in normal use

Operating at the standard 1.2 V for DDR4, the module draws minimal power and generates little heat under typical server workloads. No active cooling is required on the DIMM itself; the system's existing airflow handles thermal dissipation silently. The registered buffer adds negligible latency while maintaining signal integrity across the memory bus.

Single-module upgrade with cross-vendor validation

The kit consists of one 256 GB stick validated against Samsung M393ABG40M52-CAE, Hynix HMAT14JXSRB120N and HMAT14JXSRB122N, and Supermicro MEM-DR425MI-ER32 part numbers. JEDEC and RoHS compliance ensures a warranty-safe installation. OWC recommends populating all slots with identical capacity, speed and manufacturer modules for optimal performance.

How it compares

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

Price $1,510.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).

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Specifications

No published specifications for this item yet.

Other versions of this model

5 more in the same range

Questions about this item

How is the single 256GB DDR4 3200 RDIMM installed in the QNAP TS-h2490FU, and what step is often missed?

Power down the NAS, open the chassis, and seat the 288-pin module firmly until the retention clips click; the step often missed is confirming all installed DIMMs share the same 256GB capacity, 3200 speed, and manufacturer for optimal performance.

What maintenance or replacement will this ECC Registered RDIMM need later?

No routine maintenance is required; if a module fails, replace it with an identical 256GB DDR4 3200 PC4-25600 CL22 8Rx4 1.2V ECC Registered DIMM to maintain compatibility and avoid mixing with unbuffered or load-reduced memory.

What limit appears first under sustained heavy workloads with this 256GB module?

The CAS latency of CL22 at 3200 MT/s sets the timing boundary; sustained throughput is constrained by the DDR4 3200 PC4-25600 interface before thermal or capacity limits are reached.

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