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Green rectangular DDR4 SODIMM module with black chips and gold contacts

Computer Memory Solutions

Computer Memory Solutions CM512642400SO 4GB DDR4 2400 SODIMM

SKU CH-X2JV-S17MJ

4GB DDR4 2400 SODIMM upgrade for Lenovo ThinkPad E575, E580, E585 and L380, CL17 1.2V unbuffered non-ECC

  • Capacity4GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Timing17-17-17
  • Voltage1.2V
  • Designed for Lenovo ThinkPad E575, E580, E585, L380
  • DDR4 2400 MHz speed for responsive multitasking
  • Low 1.2 V operation reduces power draw
  • CL17 timing delivers stable data access
  • 4 GB module expands system memory capacity

Targeted Lenovo ThinkPad upgrade

This 4 GB DDR4 SODIMM module is built for the ThinkPad E575, E580, E585 and L380 families. It delivers a single 260-pin stick rated at 2400 MHz with CL17 timing and 1.2 V operation, matching the factory specifications for those laptops.

Straightforward slot installation

The unbuffered, non-ECC design drops into an available SODIMM socket without tools or configuration changes. Ensure the notebook is fully powered off and the battery disconnected where possible; the most common issue is seating the module firmly until the side clips click, otherwise the system may not recognise the new capacity.

Ideal for compatible ThinkPad owners

Users of the listed E- and L-series models can expand memory up to the platform maximum of 32 GB across two sockets. Buyers needing ECC error correction, registered modules, higher frequencies or a different pin count should look elsewhere, as this stick is strictly a 260-pin DDR4 SODIMM for the named systems.

Highlights

  • Designed for Lenovo ThinkPad E575, E580, E585, L380
  • DDR4 2400 MHz speed for responsive multitasking
  • Low 1.2 V operation reduces power draw
  • CL17 timing delivers stable data access
  • 4 GB module expands system memory capacity

Specifications

BrandComputer Memory Solutions
ModelCM512642400SO
Capacity4GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Timing17-17-17
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemLenovo Thinkpad E575, E580, E585, L380
Package Content1Memory Ram Stick

Questions about this item

How can I confirm the CM512642400SO is running at DDR4 2400 with CL17 after installation?

Open Task Manager or BIOS and verify the speed shows 2400 MHz and the timings read 17-17-17 at 1.2 V.

What comes in the package and is anything else required for a ThinkPad E575 upgrade?

The box contains one 4 GB 260-pin DDR4 SODIMM stick; no extra parts or tools are needed for the supported ThinkPad models.

Should I choose the single 4 GB module or add a second stick to reach the 32 GB maximum on my E580?

One module gives 4 GB in a single slot; adding a second identical stick doubles capacity to 8 GB while keeping dual-channel performance, and you can expand up to the 32 GB limit across two sockets.

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