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Green bare circuit board with gold edge contacts and black memory chips

OWC

OWC 16GB DDR4 2666 CL19 2Rx8 288-pin 1.2V Non-ECC UDIMM memory upgrade

SKU CH-16CM-B55TZ

16 GB DDR4 2666 CL19 UDIMM for QNAP TS-h977XU-RP, TS-h1277XU-RP, TS-h1677XU-RP and TS-h2477XU-RP

  • Capacity16GB
  • Type288-Pin DDR4 Non-ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • 16GB DDR4 2666 CL19 boosts multitasking speed for QNAP NAS
  • Single 16GB UDIMM module installs easily in TS-h1277XU-RP TS-h1677XU-RP TS-h2477XU-RP TS-h977XU-RP
  • JEDEC and ROHS compliant ensures warranty-safe upgrade
  • 2V low-voltage operation reduces power draw
  • Backward compatible with 2133MHz and 2400MHz systems

QNAP NAS memory upgrade

This single 16GB DDR4 module is built for the QNAP TS-h1277XU-RP, TS-h1677XU-RP, TS-h2477XU-RP and TS-h977XU-RP. It adds capacity to compatible rackmount NAS systems that use standard unbuffered DIMMs. Buyers who need ECC protection or registered modules should look elsewhere.

JEDEC standard unbuffered DIMM

The stick follows JEDEC PC4-21300 specifications at 1.2V and carries no heat spreader. Its 288-pin edge connector fits any DDR4 UDIMM slot wired for 2666, 2400 or 2133 MT/s operation. Systems that require ECC or registered memory will not accept this module.

CL19 2Rx8 2666 MT/s specification

Rated at DDR4 2666 with CAS latency 19 and a dual-rank 2Rx8 organisation, this module determines whether the NAS can populate the slot at full rated speed. If the platform demands a different rank structure or lower latency, the upgrade will not meet the requirement.

Privalumai

  • 16GB DDR4 2666 CL19 boosts multitasking speed for QNAP NAS
  • Single 16GB UDIMM module installs easily in TS-h1277XU-RP TS-h1677XU-RP TS-h2477XU-RP TS-h977XU-RP
  • JEDEC and ROHS compliant ensures warranty-safe upgrade
  • 2V low-voltage operation reduces power draw
  • Backward compatible with 2133MHz and 2400MHz systems

Specifikacijos

BrandOWC
Part Number2U6D42R816GB
Capacity16GB
Type288-Pin DDR4 Non-ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemQNAP TS-h1277XU-RP
QNAP TS-h1677XU-RP
QNAP TS-h2477XU-RP
QNAP TS-h977XU-RP

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What speed does the DDR4 2666 module actually run at in a QNAP TS-h1277XU-RP?

It operates at 2666 MHz (PC4-21300) with CL19 latency and will down-clock to 2400 MHz or 2133 MHz if the system requires it.

Does the 288-pin UDIMM fit the memory slots in a TS-h1677XU-RP without a heat spreader?

Yes, the bare 288-pin unbuffered DIMM matches the slot keying and low-profile clearance of those QNAP models.

What is the correct way to seat the module so the retention clips lock on a TS-h2477XU-RP?

Align the notch, press straight down with even force until both side clips snap shut, then verify the module sits flush.

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