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Green rectangular memory module with gold contacts and black chips, no heat spreader

OWC

OWC 16GB DDR4 2666MHz CL19 1.2V 288-Pin UDIMM 2U6D42R816GB

SKU CH-31JD-PD98Q

16GB DDR4 2666MHz CL19 UDIMM compatible with HP EliteDesk 705 and 800 G5 models

  • Capacity16GB
  • Type288-Pin DDR4 Non-ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • 16 GB DDR4 boosts multitasking on HP EliteDesk 705 and 800 G5 models
  • 2666 MHz CL19 speed delivers responsive performance for daily workloads
  • 2 V operation reduces power draw while maintaining stability
  • 288-pin unbuffered UDIMM fits standard desktop DIMM slots without extra hardware
  • Backward compatible with 2133 MHz and 2400 MHz systems for flexible upgrades

16GB DDR4 2666MHz UDIMM for HP EliteDesk

This 16GB DDR4 2666MHz CL19 module is built for HP EliteDesk 705 G4 SFF, 705 G5 Mini, 705 G5 SFF, 800 G5 SFF and 800 G5 Tower systems. It delivers a straightforward capacity increase for office workstations handling everyday multitasking and larger datasets. Buyers needing ECC error correction or registered DIMMs for server-grade platforms cannot use this non-ECC unbuffered design.

DDR4 2666MHz JEDEC standard limits

The module runs at the JEDEC-standard 2666MHz (PC4-21300) with 1.2V operation and CL19 latency. It will down-clock automatically to 2400MHz or 2133MHz if the host platform requires a lower speed. Systems that demand higher frequencies or lower latencies than the JEDEC baseline will not gain additional performance from this part.

Tool-free slot installation

The 288-pin UDIMM fits standard desktop DIMM slots and requires no tools beyond opening the chassis. Ensure the motherboard supports non-ECC unbuffered DDR4 and that the total installed capacity stays within the system's qualified maximum. The most common issue is mixing ranks or speeds that the BIOS cannot train together, so verify the existing configuration before adding this 2Rx8 module.

Highlights

  • 16 GB DDR4 boosts multitasking on HP EliteDesk 705 and 800 G5 models
  • 2666 MHz CL19 speed delivers responsive performance for daily workloads
  • 2 V operation reduces power draw while maintaining stability
  • 288-pin unbuffered UDIMM fits standard desktop DIMM slots without extra hardware
  • Backward compatible with 2133 MHz and 2400 MHz systems for flexible upgrades

Specifications

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 SystemHP EliteDesk 705 G4 SFF
HP EliteDesk 705 G5 Mini
HP EliteDesk 705 G5 SFF
HP EliteDesk 800 G5 SFF
HP EliteDesk 800 G5 Tower

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Questions about this item

Should I pick the 16GB module or a different capacity for my HP EliteDesk?

This listing is for a single 16GB DDR4 2666MHz CL19 UDIMM. If your EliteDesk 705 G4 SFF, 705 G5 Mini, 705 G5 SFF, 800 G5 SFF or 800 G5 Tower has a free 288-pin slot, adding this module increases total memory by 16GB.

What does the 2666MHz rating actually deliver once installed?

The module runs at 2666MHz (PC4-21300) with CL19 latency at 1.2V. In a compatible EliteDesk it will operate at that speed, or down-clock automatically to 2400MHz or 2133MHz if the system requires it.

Is the DDR4 288-pin UDIMM interface the limiting factor for speed?

The 288-pin unbuffered non-ECC UDIMM form factor supports the rated 2666MHz transfer rate. The practical ceiling is the memory controller in your specific EliteDesk model, which may run the module at 2666MHz, 2400MHz or 2133MHz.

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