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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM2048642400SO 16GB DDR4 2400 Lenovo IdeaPad S340 S145 memory upgrade

SKU CH-27EJ-X5FCK

16 GB DDR4 2400 MHz SO-DIMM upgrade for Lenovo IdeaPad S340 and S145 laptops

  • Total capacity16 GB
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL17
  • Memory timings17-17-17
  • Rated voltage1.2 V
  • 16 GB DDR4 2400 MHz boosts multitasking speed
  • CL17 timing and 1.2 V keep power draw low
  • 260-pin SO-DIMM fits IdeaPad S340 and S145 laptops
  • Single 16 GB module leaves second slot free
  • Major-brand chips tested for Lenovo compatibility

Lenovo IdeaPad S340 S145 upgrade

This 16 GB DDR4 SO-DIMM is built specifically for Lenovo IdeaPad S340 and S145 laptops. It targets owners who need the maximum single-module capacity these platforms accept. Buyers with other notebook models or desktop systems cannot use this module.

260-pin unbuffered non-ECC build

The stick uses a standard 260-pin SO-DIMM edge connector and operates at 1.2 V without ECC or buffering. Major-brand chips are mounted directly on the PCB with no heat spreader, keeping the profile low enough for thin chassis. Installation is a simple slot-in action; no tools or configuration are required.

DDR4-2400 CL17 single-channel limit

Running at 2400 MT/s with 17-17-17 timings, the module delivers PC4-19200 bandwidth on a single 64-bit channel. The platform supports only one memory socket, so total capacity stops at 16 GB or 20 GB depending on the exact model. Users needing more memory or dual-channel throughput must choose a different laptop.

How it compares

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

Price $76.99
Cheaper than about 71% 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 $4.81 per GB
Cheaper than about 79% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM2048642400SO
Total capacity16 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL17
Memory timings17-17-17
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsLenovo IdeaPad S340 (14) Series, S340-15IML, S340 (14 in) Intel, S145-15IIL Series, S145-15API (15) AMD Series
In the box
Included items1Memory Ram Stick

Questions about this item

Does this DDR4-2400 SODIMM run at the full 2400 MHz on a Lenovo IdeaPad S340-14?

It is rated DDR4 2400 (PC4-19200). The laptop’s memory controller will set the final speed.

Will the 260-pin module fit the S145-15API AMD model?

Yes. The 260-pin SO-DIMM matches the slot used by the listed S145-15API and S340 models.

What is the correct way to seat the stick, and what step do people miss?

Align the notch, insert at an angle, then press down firmly until both side clips click. People often stop before the clips engage.

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