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Green circuit board with black memory chips, 260 gold pins, thin SODIMM form factor

Computer Memory Solutions

Computer Memory Solutions CM2048642666SO 16GB DDR4 2666MHz SODIMM D35

SKU CH-2ZND-P21G7

A 16 GB DDR4 2666 MHz SODIMM module with CL19 timing and 1.2 V operation, validated for Lenovo ThinkPad P1 and X1 Extreme second-generation systems

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 16 GB DDR4 2666 MHz module boosts multitasking headroom
  • CL19 timing at 1.2 V keeps latency low and power draw minimal
  • 260-pin SODIMM form factor fits ThinkPad P1 and X1 Extreme (2nd Gen) slots
  • Single 16 GB stick leaves three sockets free for future expansion up to 128 GB
  • Non-ECC unbuffered design matches Intel Core i9/i7/i5 platform requirements

16GB DDR4 SODIMM for Lenovo Workstations

This 16GB DDR4 2666MHz SODIMM module is built for Lenovo ThinkPad P1 and X1 Extreme second-generation laptops. It uses a 260-pin unbuffered non-ECC design with CL19 timings at 1.2V. The single-stick kit suits owners who need a direct replacement or a capacity increase without changing the platform.

DDR4 2666 SO-DIMM speed ceiling

The DDR4 2666 interface caps data rate at 2666 MT/s with a PC4 21300 bandwidth rating. Installed modules will run at the slowest speed present in the system or allowed by the processor memory controller. Mixing faster sticks provides no benefit because the bus cannot exceed this specification.

16GB single rank headroom

One 16GB module fills a single slot and leaves three sockets open toward the 128GB platform maximum. A 64-bit operating system is required to address more than 4GB. Buyers who want more storage than one stick provides must add matched pairs to reach higher capacities.

How it compares

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

Price $80.99
Cheaper than about 70% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.06 per GB
Cheaper than about 76% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM2048642666SO
Total capacity16 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 systemsLenovo ThinkPad P1 (2nd Gen), ThinkPad X1 Extreme (2nd Gen)
In the box
Included items1 Memory RAM Stick

Questions about this item

Is the 16 GB module sold individually or as a matched pair?

This listing is for a single 16 GB stick (1X16GB). To run in dual-channel mode you would need to add a second identical module.

Will the DDR4 2666 rating actually run at 2666 MHz in a ThinkPad P1 or X1 Extreme?

The module is rated at 2666 MHz (PC4 21300). The final speed will be limited by the processor's memory controller and any slower modules already installed.

Does the 260-pin SODIMM interface limit bandwidth compared to desktop DIMMs?

The 260-pin SODIMM form factor carries the same DDR4 2666 signal as desktop DIMMs; the pin count only reflects the smaller physical size for laptops.

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