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Computer Memory Solutions

Computer Memory Solutions CM5126410600SODRH 4GB DDR3 1333 SODIMM for ThinkPad T420 4177 4178 4180 4236

SKU CH-X3KX-T25J6

A 4GB DDR3 1333MHz SODIMM module for upgrading Lenovo ThinkPad T420 series laptops

  • Total capacity4 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • Boosts multitasking with 4 GB DDR3 1333 MHz capacity
  • Low CL7 latency sharpens response for everyday tasks
  • Runs at standard 1.5 V for broad laptop compatibility
  • 204-pin SODIMM fits ThinkPad T420 4177 4178 4180 4236
  • Guaranteed compatible by CMS for listed Lenovo models

System-Specific DDR3 Upgrade

This 4 GB SODIMM is built for Lenovo ThinkPad T420 models 4177, 4178, 4180 and 4236. It targets owners who need a single-module capacity increase without replacing both factory slots. The module uses 204-pin DDR3 technology at 1333 MHz with CL7 timing. It is not for systems that require ECC, registered memory or a different DDR generation.

Build Integration

The stick fits one of the two SO-DIMM sockets in the supported ThinkPads and runs at the standard 1.5 V. It leaves the second slot free for an additional 4 GB module to reach the platform maximum of 8 GB. No heat spreader is present, so it clears tight chassis clearances. Buyers whose laptops already contain two modules cannot add this without removing one.

Included Module

The package contains one 4 GB memory stick backed by the manufacturer’s lifetime warranty when purchased directly. There are no cables, tools or software utilities supplied. The single-module kit lets you upgrade in 4 GB increments rather than forcing a matched pair purchase.

How it compares

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

Price $19.99
Cheaper than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $5.00 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126410600SODRH
Total capacity4 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
Memory timings7-7-7
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo Thinkpad T420 4177, 4178, 4180, 4236 Series
In the box
Included items1 Memory RAM Stick

Questions about this item

What speed ceiling does the 1.5 V DDR3 1333 module hit during long workloads?

The module runs at DDR3 1333 (PC3 10600) with CL7 timing, so sustained throughput is limited by that 1333 MT/s data rate and the 1.5 V operating voltage.

How much heat or fan noise does the unbuffered 2Rx8 stick add when the laptop runs all day?

The SODIMM has no heat spreader and draws standard 1.5 V DDR3 power, so it adds negligible heat and no audible noise; the system fan curve stays unchanged.

Which ThinkPad models and slot count does this 204-pin SODIMM fit without extra parts?

It is validated for ThinkPad T420 4177, 4178, 4180 and 4236 series, which have two DDR3 SODIMM slots supporting up to 8 GB total.

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