We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular DDR4 DIMM module with black chips no heat spreader 288 pins

A-Tech

A-Tech 8GB DDR4 2666MHz CL19 Desktop RAM for HP L40877-800 L21495-001

SKU CH-8QCK-KW5HT

An 8 GB DDR4 2666 MHz desktop DIMM with CL19 latency and 1.2 V operation, built as a compatible replacement for HP part numbers L40877-800 and L21495-001

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Tested speed2666
  • Rated voltage1.2 V
  • 8GB capacity lets you run more apps at once with a single 8GB module
  • 2666MHz DDR4 speed moves data quickly at PC4-21300 bandwidth
  • CL19 latency keeps response tight for everyday desktop workloads
  • 20V standard voltage reduces power draw and heat in compatible HP systems
  • 288-pin unbuffered DIMM fits HP L40877-800 and L21495-001 slots directly

8 GB DDR4 2666 MHz desktop module

This 8 GB DDR4 2666 MHz DIMM is built as a direct replacement for HP part numbers L40877-800 and L21495-001. It targets owners of compatible HP desktops who need a straightforward memory upgrade without ECC or registered buffering.

Single stick with standard voltage

The module arrives as a single 8 GB stick running at 1.2 V with CL19 latency. No heat spreader is included, and no extra software or cables are bundled, so the only change is the added capacity at the rated 2666 MHz speed.

288 pin unbuffered DIMM for everyday installs

The 288 pin unbuffered DIMM fits standard desktop slots and uses major brand chips tested for reliability. Its plain green PCB and lack of a spreader keep height low, making it practical for tight chassis or dense memory banks.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $48.99
Cheaper than about 66% of the 3,647 comparable items (median $90.99).
Total capacity 8 GB
Lower than about 60% of the 3,251 comparable items (median 16 GB).
Price per GB $6.12 per GB
Cheaper than about 57% of the 3,251 comparable items (median $6.75 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 nameA-Tech
Product lineCompatible Replacement for HP
Model nameL40877-800, L21495-001
Total capacity8 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
Tested speed2666
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forCompatible Replacement for HP L40877-800, L21495-001

Questions about this item

Does the 8 GB DDR4 2666 MHz CL19 module have any user-replaceable parts?

The module is a sealed 288-pin DIMM with no heat spreader and no user-serviceable components; replacement means installing another identical stick.

What limits sustained throughput on this DDR4 2666 CL19 stick?

The JEDEC-standard 2666 MT/s data rate and CL19 latency set the ceiling; the memory controller cannot push beyond those timings.

How much heat and power does the 1.2 V DDR4 2666 module produce during all-day use?

At the standard 1.2 V the stick draws minimal power and runs cool enough that no heat spreader is required for continuous operation.

More in Desktop RAM

Similar items