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Green circuit board with black memory chips, gold edge connector, thin rectangular SODIMM form factor

Computer Memory Solutions

Computer Memory Solutions 8GB DDR3 1333MHz SODIMM for ThinkPad T420S

SKU CH-Z6SG-4WXJA

8GB DDR3 1333MHz SODIMM upgrades compatible Lenovo ThinkPad T420S models 4170, 4171, 4173, 4174 with 1.5V CL9 timing

  • Total capacity8 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • 8 GB capacity lets you run more applications simultaneously
  • 1333 MHz DDR3 speed matches the ThinkPad T420S specification
  • 204-pin SODIMM form factor fits the laptop memory slots directly
  • CL9 latency provides responsive data access for everyday workloads
  • 5 V operation keeps power draw within the system design limits

Targeted Upgrade for ThinkPad T420S

This 8GB DDR3 SODIMM module is built specifically for the Lenovo ThinkPad T420S series including models 4170, 4171, 4173, and 4174. It suits users who need to maximise the memory capacity of these specific laptops for everyday multitasking and legacy application support.

Fits Single Slot in Dual-Socket Layout

The 204-pin unbuffered non-ECC stick installs directly into one of the two SODIMM slots available in the compatible ThinkPad models. It requires no heat spreader and operates at standard 1.5V voltage, leaving the second slot free for an additional module to reach the system maximum.

8GB Module Towards 16GB Limit

Each stick provides 8GB of DDR3 1333MHz memory with CL9 latency, using a 2Rx8 rank configuration with major brand chipsets. Two such modules fill both sockets to reach the 16GB platform ceiling; a single module leaves headroom for a future matching upgrade while doubling typical factory configurations.

How it compares

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

Price $22.99
Cheaper than about 89% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $2.87 per GB
Cheaper than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM10246410600SODRH
Total capacity8 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo Thinkpad T420S 4170, 4171, 4173, 4174
In the box
Included items1 Memory RAM Stick

Questions about this item

How much memory can the ThinkPad T420S actually use with this 8 GB module installed?

The T420S supports a maximum of 16 GB across its two slots, so a single 8 GB stick leaves room for another 8 GB module to reach the limit.

Does the 1.5 V DDR3 stick run hot or loud during continuous operation?

The module has no heat spreader and draws standard 1.5 V; it relies on the laptop's existing cooling and produces no audible noise.

What must the T420S already have for this SODIMM to work?

The laptop needs a free 204-pin DDR3 SO-DIMM slot and a BIOS that recognises PC3-10600 1333 MHz unbuffered non-ECC memory.

More in Model-Specific Memory Upgrades

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