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Green circuit board with gold edge connector and black memory chips

OWC

OWC 4GB DDR3 1600 PC3-12800 CL11 2Rx8 240-pin 1.5V ECC Unbuffered UDIMM Memory Upgrade

SKU CH-XRX9-KQ3NR

4 GB DDR3-1600 ECC UDIMM module for QNAP SS-EC and TS-EC series NAS units

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 4GB capacity expands system memory for multitasking
  • DDR3 1600 speed with CL11 latency delivers responsive performance
  • ECC unbuffered design protects data integrity in servers
  • 240-pin UDIMM fits QNAP SS-EC and TS-EC series
  • JEDEC and RoHS compliant for warranty-safe upgrades

QNAP NAS Memory Upgrade

This 4GB DDR3 1600 module is built for QNAP SS-EC and TS-EC SAS rackmount units. It adds ECC protection to compatible storage servers that need data integrity for critical workloads. The unbuffered design fits the specific memory slots on the listed models. Buyers who need higher capacities or registered DIMMs cannot use this module.

240-Pin DIMM Installation

The stick inserts into a standard 240-pin DDR3 slot on the system board. No heat spreader means the module sits low, but adjacent components can still block access in dense chassis. Alignment notches prevent backward insertion, yet forcing the latch risks cracking the PCB. Systems that require matched pairs or specific population rules will not accept a single stick.

Sustained ECC Operation

ECC circuitry corrects single-bit errors continuously during long file transfers or RAID rebuilds. The 1.5V rating keeps power draw steady under constant load without thermal throttling. JEDEC CL11 timing maintains stability when the memory controller runs at full speed for hours. Workloads that exceed 4GB capacity will swap to disk, negating the speed advantage.

How it compares

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

Price $19.99
Cheaper than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $5.00 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number1E6D32R804 GB
Total capacity4 GB
Product type240-Pin DDR3 ECC UDIMM
Performance
Rated speedDDR3 1600 (PC3 12800)
Memory
CAS latencyCL11
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsQNAP SS-EC1279U-SAS-RP
QNAP SS-EC1679U-SAS-RP
QNAP SS-EC1879U-SAS-RP
QNAP SS-EC2479U-SAS-RP
QNAP TS-EC1279U-SAS-RP

Other versions of this model

5 more in the same range

Questions about this item

How can I verify the 4GB DDR3 1600 module is running at CL11 1.5V after installing it in my QNAP SS-EC1279U-SAS-RP?

Enter the NAS BIOS or use the QNAP system information page; it will show the detected speed as PC3-12800, CAS latency 11 and voltage 1.5V for the new DIMM.

What ships with the OWC 1E6D32R804GB module and what must I source separately?

The box contains the single 4GB 240-pin ECC UDIMM only; no tools, screws or additional memory sticks are included.

Which capacity should I choose if my TS-EC1279U-SAS-RP has four empty slots and supports up to 32GB total?

Populate each slot with a 4GB module to reach the 32GB maximum; mixing different capacities is not required.

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