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Green printed circuit board with black memory chips on both sides, 288 gold contacts along bottom edge

Computer Memory Solutions

Computer Memory Solutions CM1024642666DIMM 8GB DDR4 2666MHz CL19 288-pin DIMM memory upgrade

SKU CH-0GA0-H0C04

8GB DDR4 2666MHz CL19 DIMM validated for HP Pavilion 690-0020 and 690-0021nf desktops

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 8GB single module expands capacity for HP Pavilion 690 desktops
  • DDR4 2666MHz speed matches system specifications for stable operation
  • CL19 latency timing supports responsive multitasking performance
  • 20V low voltage reduces power draw during intensive workloads
  • 288-pin unbuffered DIMM fits directly into available motherboard slots

8GB DDR4 2666MHz DIMM for HP Pavilion 690

This 8GB DDR4 module runs at 2666MHz with CL19 timings and 1.20V operation. It is built as a 288-pin unbuffered DIMM using 2Rx8 chips without ECC or a heat spreader. The kit contains one stick and is validated for the HP Pavilion 690-0020 and 690-0021nf gaming desktops.

Check motherboard slots and maximum capacity first

The Pavilion 690 platform provides two DIMM slots and supports up to 32GB total. Verify how many slots are already occupied and whether the installed memory runs at 2666MHz or slower, because all modules will operate at the lowest common speed. A 64-bit operating system is required to address more than 4GB.

Fits straight into a standard 288-pin DDR4 slot

No extra power cables, adapters or cooling brackets are needed; the stick draws 1.20V from the slot itself. Adding this module leaves the second slot free for a future matched pair, which the manufacturer recommends for best throughput. The non-ECC, unbuffered design keeps it compatible with the consumer chipset used in these HP systems.

How it compares

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

Price $40.99
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 $5.12 per GB
Cheaper than about 75% 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 nameComputer Memory Solutions
Model nameCM1024642666DIMM
Total capacity8 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHP/Compaq Pavilion 690-0020 Gaming Desktop PC, 690-0021nf Gaming Desktop PC,
In the box
Included items1 Memory RAM Stick

Questions about this item

Does the package include only the single 8 GB DDR4 2666 MHz stick or are extra modules required?

The box contains one 8 GB DDR4 2666 MHz CL19 288-pin DIMM; the HP Pavilion 690-0020 and 690-0021nf have two slots supporting up to 32 GB total, so a second stick can be added later for dual-channel performance.

Should I pick this CL19 2666 MHz module or look for a different speed or latency for my Pavilion 690-0020?

This CM1024642666DIMM matches the factory specification for the Pavilion 690-0020 and 690-0021nf; any faster DDR4 will simply downclock to 2666 MHz, while slower memory would reduce bandwidth, so this CL19 1.20 V kit is the correct choice.

Will the advertised 2666 MHz speed actually run at that rate once installed in my 690-0021nf?

Yes, the motherboard in the Pavilion 690-0021nf supports DDR4 2666 (PC4 21300) natively, so the module will operate at its rated 2666 MHz with 19-19-19 timings at 1.20 V without any BIOS changes.

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