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Green circuit board with black memory chips, gold edge connector, thin rectangular SO-DIMM module

Computer Memory Solutions

Computer Memory Solutions CM1024642666SO 8GB DDR4 2666 SO-DIMM CL19 1.2V 260-pin D36 memory upgrade

SKU CH-GMM1-Q0QNG

8GB DDR4 2666 SO-DIMM CL19 1.2V module validated for Dell OptiPlex 7070 Ultra and Precision 5540

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 8GB DDR4 2666 MHz expands system memory for Dell OptiPlex 7070 Ultra and Precision 5540
  • CL19 latency at 1.2V delivers responsive performance in compatible laptops and ultra-compact desktops
  • 260-pin SO-DIMM form factor fits factory memory slots without modification
  • Single-rank 1Rx8 design with major-brand chipset ensures stable operation at rated speed
  • Computer Memory Solutions tests every module for guaranteed compatibility with listed Dell models

8 GB DDR4 2666 SO-DIMM for Dell systems

This 8 GB DDR4 2666 MHz SO-DIMM is built for the Dell OptiPlex 7070 Ultra and Precision 5540. It runs at CL19 timing with 1.2 V unbuffered operation. The module uses a 260-pin layout and major-brand chips. It is sold as a single stick for straightforward memory upgrades.

Suits Dell OptiPlex 7070 Ultra and Precision 5540

Ideal for owners of the listed Dell models who need 8 GB of non-ECC DDR4 memory. Not for systems that require ECC registered modules or a different pin count. Buyers needing more than 64 GB total capacity or a matched dual-channel kit should look elsewhere.

CL19 timing at 2666 MHz

The CAS latency is CL19 with 19-19-19 timings at DDR4 2666 (PC4 21300) speed. This single specification determines whether the module matches the platform's memory controller requirements. Verify the timing before purchase.

How it compares

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

Price $38.99
Cheaper than about 81% 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 $4.87 per GB
Cheaper than about 78% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM1024642666SO
Total capacity8 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell OptiPlex 7070 Ultra, Precision 5540
In the box
Included items1 Memory RAM Stick

Questions about this item

What comes in the box and do I need anything else to install this CM1024642666SO module?

The package contains one 8GB DDR4 2666 SO-DIMM stick. No extra parts are required; the module fits directly into a compatible 260-pin slot.

Should I choose the 8GB version or is a larger capacity available for the OptiPlex 7070 Ultra and Precision 5540?

This specific model is an 8GB single stick. The platform supports up to 64GB total across its two sockets, so you can add a second module later if you need more capacity.

The spec says DDR4 2666 (PC4 21300) — what speed will it actually run at in my Precision 5540?

It will operate at up to 2666 MHz CL19 at 1.2V. If the CPU or other installed memory runs slower, the system will automatically clock all modules down to the lowest common speed.

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