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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

  • Capacity4GB
  • Type204-Pin DDR3L Non-ECC SODIMM
  • SpeedDDR3L 1600 (PC3L 12800)
  • CAS LatencyCL11
  • Voltage1.35V
  • ECCNo
  • 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.

Highlights

  • 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

Specifications

BrandOWC
Part Number1S6T31R804GB
Capacity4GB
Type204-Pin DDR3L Non-ECC SODIMM
SpeedDDR3L 1600 (PC3L 12800)
CAS LatencyCL11
Voltage1.35V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemLenovo B40-30
Lenovo B40-45
Lenovo B40-70
Lenovo B40-80
Lenovo B41-80

Other versions of this model

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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.

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