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Green circuit board with gold edge connector and black memory chips

OWC

OWC 4GB DDR3L 1600 CL11 1.35V SODIMM for Lenovo B40-30 B40-45 B40-70 B40-80 B41-80

SKU CH-C48K-WHHK3

4GB DDR3L 1600 SODIMM upgrades Lenovo B40-30, B40-45, B40-70, B40-80 and B41-80 laptops

  • Total capacity4 GB
  • Rated speedDDR3L 1600 (PC3L 12800)
  • CAS latencyCL11
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 4GB capacity adds multitasking headroom for Lenovo B-series laptops
  • DDR3L 1600 CL11 speed matches factory specifications exactly
  • Low 1.35V operation reduces power draw and heat output
  • 204-pin SODIMM form factor fits B40-30, B40-45, B40-70, B40-80, B41-80
  • JEDEC and RoHS compliant for warranty-safe upgrade confidence

OWC 4GB DDR3L 1600 SODIMM for Lenovo B-Series

This 4GB DDR3L 1600 module upgrades compatible Lenovo B40 and B41 laptops. It uses 204-pin SODIMM form factor and runs at 1.35V. The part number is 1S6T31R804GB. It is unbuffered and non-ECC with CL11 latency.

Suitable for owners of listed Lenovo models

This suits users of Lenovo B40-30, B40-45, B40-70, B40-80, or B41-80 seeking a straightforward capacity increase. It is not for buyers who need ECC error correction or registered buffering. It is also not for systems requiring a different pin count, voltage, or DDR generation.

JEDEC-standard DDR3L 1600 CL11 at 1.35V

The memory operates at DDR3L 1600 speed with PC3L-12800 rating and CL11 timing. This specific voltage and speed combination determines compatibility with the target laptops. Verify your service manual requires 1.35V DDR3L 1600 SODIMM before purchase.

How it compares

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

Price $18.99
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 $4.75 per GB
Cheaper than about 80% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number1S6T31R804 GB
Total capacity4 GB
Product type204-Pin DDR3L Non-ECC SODIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Memory
CAS latencyCL11
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsLenovo B40-30
Lenovo B40-45
Lenovo B40-70
Lenovo B40-80
Lenovo B41-80

Other versions of this model

5 more in the same range

Questions about this item

Does the OWC 4GB DDR3L SODIMM arrive as a single stick or do I need to buy a second module?

The upgrade consists of one 4GB DDR3L 1600 CL11 1.35V SODIMM; add a second identical module only if your Lenovo model has two slots and you want dual-channel bandwidth.

Should I pick this 4GB PC3L-12800 CL11 module or a faster DDR3L speed for my B40-70?

The B40 series officially supports DDR3L 1600; faster modules will simply down-clock to 1600, so this CL11 1.35V stick matches the platform without extra cost.

Will the CL11 1600 rating actually raise frame rates or just help multitasking on a B41-80?

The 1600 MT/s CL11 module restores the factory memory bandwidth, letting the integrated graphics and CPU keep more apps and browser tabs open without swapping to disk.

More in Model-Specific Memory Upgrades

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