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Two green 204-pin DDR3 SODIMM sticks, 16GB total

Computer Memory Solutions

Computer Memory Solutions 16GB (2x8GB) DDR3 1333 SODIMM for ThinkPad T420S

SKU CH-GV8R-3F4WF

16 GB DDR3-1333 SODIMM kit (2 × 8 GB, CL9, 1.5 V) validated for Lenovo ThinkPad T420s 4170, 4171, 4173, 4174

  • Capacity16GB (2 x 8GB)
  • Type204-Pin DDR3 SO-DIMM
  • SpeedDDR3 1333 (PC3 10600)
  • CAS LatencyCL9
  • Timing9-9-9
  • Voltage1.5V
  • 16 GB dual-channel kit boosts multitasking headroom
  • 1333 MHz DDR3 speed matches ThinkPad T420S spec
  • CL9 9-9-9 timing keeps latency low
  • 5 V unbuffered modules install without BIOS tweaks
  • 204-pin SODIMM form factor fits the two factory slots

16 GB DDR3 kit for ThinkPad T420S

This 16 GB kit contains two 8 GB DDR3 1333 SODIMM modules built for the Lenovo ThinkPad T420S series. It targets owners of models 4170, 4171, 4173 and 4174 who want the maximum memory the platform accepts.

Tool-free installation under the keyboard

The 204-pin modules slot into the two memory sockets beneath the keyboard or palm rest. No screws secure the sticks; they lock by spring clips. The only common issue is inserting a module at an angle so the gold contacts do not seat fully.

Verify model number and slot count

Confirm the laptop label reads 4170, 4171, 4173 or 4174 before ordering. The board provides exactly two SODIMM sockets, so both modules must be installed together to reach 16 GB.

Highlights

  • 16 GB dual-channel kit boosts multitasking headroom
  • 1333 MHz DDR3 speed matches ThinkPad T420S spec
  • CL9 9-9-9 timing keeps latency low
  • 5 V unbuffered modules install without BIOS tweaks
  • 204-pin SODIMM form factor fits the two factory slots

Specifications

BrandComputer Memory Solutions
ModelCM10246410600SODRH
Capacity16GB (2 x 8GB)
Type204-Pin DDR3 SO-DIMM
SpeedDDR3 1333 (PC3 10600)
CAS LatencyCL9
Timing9-9-9
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemLenovo Thinkpad T420S 4170, 4171, 4173, 4174
Package Content2 Memory RAM Sticks

Questions about this item

How can I confirm the 16GB kit is running at 1333 MHz after installing it in my ThinkPad T420S?

Open Task Manager or a tool like CPU-Z and check the memory tab; it should show DDR3-1333 (PC3-10600) at 1.5 V with CL9 timings.

What comes in the box and do I need anything else for the upgrade?

The package contains two 8 GB DDR3 204-pin SODIMM modules; no extra parts or tools are required for the ThinkPad T420S memory slots.

Which capacity version should I choose for a T420S 4173 that supports 16 GB maximum?

This 16 GB (2 x 8 GB) kit matches the system's 16 GB limit and two sockets, so it is the correct single-kit choice.

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