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Green 204-pin DDR3L SODIMM module with black chips

OWC

OWC 8GB DDR3L 1600 CL11 2Rx8 1.35V SODIMM memory upgrade for Lenovo ThinkPad P50s S431 S440 S531 S540 T440

SKU CH-6PB5-T26PX

An 8 GB DDR3L SODIMM running at 1600 MHz with CL11 latency and 1.35 V for compatible Lenovo ThinkPad laptops

  • Total capacity8 GB
  • Rated speedDDR3L 1600 (PC3L 12800)
  • CAS latencyCL11
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 8GB capacity lets you run more applications simultaneously
  • DDR3L 1600 speed with CL11 latency delivers responsive system performance
  • 35V low-voltage operation reduces power draw and heat
  • 204-pin SODIMM form factor fits compatible ThinkPad models directly
  • JEDEC and RoHS compliant for warranty-safe upgrade confidence

8GB DDR3L SODIMM for ThinkPad

This 8GB DDR3L SODIMM runs at 1600 MHz with CL11 latency and 1.35V operation. It targets owners of Lenovo ThinkPad P50s, S431, S440, S531, S540 and T440 models who need a single-module capacity increase.

204-pin unbuffered non-ECC layout

The module uses a standard 204-pin SO-DIMM edge connector and 2Rx8 organisation without a heat spreader. JEDEC and RoHS compliance means it fits the factory slot and meets OEM electrical requirements for warranty-safe upgrades.

Low-voltage DDR3L thermals

Operating at 1.35V reduces power draw and heat output compared with standard DDR3, helping the laptop's existing cooling cope with the extra capacity. No active cooling is required on the module itself.

How it compares

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

Price $27.99
Cheaper than about 86% 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 $3.50 per GB
Cheaper than about 87% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number1S6T32R808 GB
Total capacity8 GB
Product type204-Pin DDR3L Non-ECC SODIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Memory
CAS latencyCL11
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsLenovo ThinkPad P50s
Lenovo ThinkPad S431
Lenovo ThinkPad S440
Lenovo ThinkPad S531
Lenovo ThinkPad S540

Other versions of this model

5 more in the same range

Questions about this item

What bandwidth does the DDR3L 1600 PC3L-12800 interface deliver?

The DDR3L 1600 PC3L-12800 standard provides a peak transfer rate of 12800 MB/s at 1600 MHz.

Does the 204-pin SODIMM fit the memory slot in a ThinkPad T440?

Yes, the 204-pin SODIMM form factor matches the DDR3L slot used in the ThinkPad T440 and the other listed models.

How do I install the module, and what step is often missed?

Power off the laptop, remove the bottom cover, insert the SODIMM at an angle until the gold contacts disappear, then press down until the side clips click — skipping the click leaves the module loose.

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