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Green rectangular DDR4 UDIMM module with black chips and gold contacts

OWC

OWC 2U6D41R808GB 8GB DDR4 2666 CL19 1.2V 288-Pin UDIMM memory upgrade

SKU CH-81D3-F660G

8GB DDR4 2666 CL19 UDIMM for HP EliteDesk 705 G4 SFF, 705 G5 Mini, 705 G5 SFF, 800 G5 SFF and 800 G5 Tower

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 8GB capacity expands multitasking headroom for daily workloads
  • DDR4 2666 CL19 timing delivers responsive system performance
  • 2V operation reduces power draw and heat output
  • 288-pin UDIMM fits HP EliteDesk 705 G4 SFF, 705 G5 Mini, 705 G5 SFF, 800 G5 SFF and 800 G5 Tower
  • Backward compatible with 2133MHz and 2400MHz platforms for flexible deployment

HP EliteDesk memory upgrade

This 8GB DDR4 module is built for HP EliteDesk 705 G4 SFF, 705 G5 Mini, 705 G5 SFF, 800 G5 SFF and 800 G5 Tower systems. It targets office and small-business PCs that need more multitasking headroom without a platform change. Buyers who need ECC protection or registered DIMMs cannot use this kit.

Low-voltage unbuffered operation

The stick runs at 1.2V with CL19 latency at 2666MHz, matching JEDEC standard timings for cool, quiet operation inside compact SFF and Mini chassis. No heat spreader is fitted, keeping the profile low for tight clearances. Power draw stays at the DDR4 baseline, so the existing PSU and cooling handle the upgrade without extra noise.

Replaces slower DDR4 or fills empty slots

The module is backward compatible with 2133MHz and 2400MHz systems, so it drops straight into earlier EliteDesk builds running at those speeds. The jump is worth it when the current configuration has 8GB or less total, or when empty 288-pin slots are available for a simple capacity increase. Users already at the platform maximum will not gain additional memory.

How it compares

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

Price $41.99
Cheaper than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2U6D41R808 GB
Total capacity8 GB
Product type288-Pin DDR4 Non-ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHP EliteDesk 705 G4 SFF
HP EliteDesk 705 G5 Mini
HP EliteDesk 705 G5 SFF
HP EliteDesk 800 G5 SFF
HP EliteDesk 800 G5 Tower

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 288-pin DDR4 UDIMM in an HP EliteDesk 800 G5 Tower, and what step do people often miss?

Power off the PC, unplug it, open the case, align the notch on the 288-pin DDR4 UDIMM with the slot key, press firmly until both retention clips click, then close the case. The step many miss is verifying the module is fully seated by checking that both clips are locked before powering on.

What maintenance or replacement will this 8GB DDR4 2666 CL19 module need over its lifetime?

No scheduled maintenance is required for this unbuffered non-ECC DDR4 module. It has no heat spreader, so keep interior dust clear for airflow. Replacement is only needed if a memory error appears or capacity needs increase beyond the 8GB this stick provides.

What limit appears first when this 1.2V DDR4 2666 memory runs under sustained load?

The 1.2V operating voltage and CL19 latency are fixed by JEDEC specification. Under sustained load the first limit is the module's rated 2666 MT/s speed; it will not exceed this frequency even if the system supports higher speeds.

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