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Two green DDR4 SODIMM sticks, black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM4096642666SO 64GB (2x32GB) DDR4 2666MHz SODIMM memory upgrade

SKU CH-3AZN-9R5J6

A 64 GB dual-channel kit of two 32 GB DDR4 2666 MHz SODIMM modules for Dell OptiPlex 7070 Ultra and Precision 5540

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 64GB total capacity in a matched 2 x 32GB kit
  • DDR4 2666MHz speed rated at PC4 21300 for responsive multitasking
  • CL19 19-19-19 timings at 1.2V for stable operation
  • 260-pin unbuffered non-ECC SODIMM fits Dell OptiPlex 7070 Ultra and Precision 5540
  • Lifetime warranty against manufacturing defects from Computer Memory Solutions

System-specific DDR4 upgrade

This 64 GB kit contains two 32 GB SO-DIMM modules built for Dell OptiPlex 7070 Ultra and Precision 5540 systems. It delivers the exact pin count and timing those platforms expect, so the memory is recognised immediately on installation. The unbuffered, non-ECC design matches the factory specification for these workstations and compact desktops. Buyers who need a different capacity or a different form factor should look elsewhere.

Low-voltage operation

Each module runs at 1.2 V with CL19 timings, keeping power draw and heat output minimal inside the tight chassis of the supported Dell models. No heat spreader is fitted, allowing the sticks to sit flush in the two SODIMM sockets without clearance issues. The memory operates silently because it has no moving parts and requires no active cooling. Systems that demand registered or ECC memory cannot use this kit.

64 GB matched pair

The two 32 GB modules are tested together as a matched pair to ensure stable dual-channel performance at 2666 MHz (PC4-21300). This capacity is the maximum the listed Dell platforms officially support, so no larger configuration is possible. A 64-bit operating system is required to address the full amount. Builders who need more than 64 GB or a different speed grade will not be served by this product.

How it compares

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

Price $280.99
Cheaper than about 55% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $4.39 per GB
Cheaper than about 82% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM4096642666SO
Total capacity64 GB (2 × 32 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 rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell OptiPlex 7070 Ultra, Precision 5540
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I install the 260-pin SODIMM modules in my Dell OptiPlex 7070 Ultra, and what is the common mistake?

Power off and unplug the system, open the chassis, align the notch on each 260-pin module with the slot key, insert at an angle, then press down until the side clips click. The step most people miss is pressing firmly enough to fully seat both clips.

What maintenance or replacement will this 64GB kit need over time?

No routine maintenance is required. The modules carry a limited lifetime warranty against manufacturing defects. If a stick fails, Computer Memory Solutions will exchange or repair it. Keep the gold contacts clean and avoid static when handling.

What limit appears first when this CL19 2666MHz memory runs sustained workloads?

The CAS latency of 19 cycles at 2666MHz sets the baseline response time. Under continuous load the memory controller and CPU thermal limits will throttle before the modules themselves hit a hard ceiling.

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