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Green circuit board with black memory chips and gold edge connector

OWC

OWC 4GB DDR3 1600 CL11 1Rx8 204-pin 1.5V SODIMM ThinkPad L530 T430 T430i T430s T430si T431s T530

SKU CH-Q9Y0-T3E47

4 GB DDR3-1600 SODIMM for ThinkPad L530, T430, T430i, T430s, T430si, T431s and T530

  • Capacity4GB
  • Type204-Pin DDR3 Non-ECC SODIMM
  • SpeedDDR3 1600 (PC3 12800)
  • CAS LatencyCL11
  • Voltage1.5V
  • ECCNo
  • 4GB capacity expands multitasking headroom on compatible ThinkPads
  • DDR3 1600 CL11 speed matches factory memory timing
  • 5V JEDEC-standard voltage ensures warranty-safe operation
  • 204-pin SODIMM form factor fits L530 T430 T430i T430s T430si T431s T530
  • Single 1Rx8 module installs easily for DIY upgrade

4GB DDR3 1600 SODIMM for ThinkPad L530 T430 series

This 4GB DDR3 1600 CL11 SODIMM is built for Lenovo ThinkPad L530, T430, T430i, T430s, T430si, T431s and T530 laptops. It uses a 204-pin unbuffered non-ECC layout at 1.5V. The module adds memory capacity to supported systems without requiring configuration changes. Buyers needing ECC or registered memory cannot use this module.

Sustained load behaviour

The JEDEC-standard PC3-12800 rating means the module runs at its rated 1600 speed under continuous workloads. CL11 latency stays consistent during extended sessions such as large file editing or multi-tab browsing. The single-rank 1Rx8 organisation helps the memory controller keep timing stable. Systems that demand higher frequencies or lower latencies will not reach those targets with this part.

Build and connectors

The stick follows the standard 204-pin SODIMM form factor with no heat spreader, so it fits the tight SO-DIMM slots in the listed ThinkPad models. Gold-edge contacts resist oxidation through repeated insertions. JEDEC and RoHS compliance ensures the module meets industry electrical and environmental rules. Laptops that require 1.35V low-voltage modules are not compatible with this 1.5V design.

Highlights

  • 4GB capacity expands multitasking headroom on compatible ThinkPads
  • DDR3 1600 CL11 speed matches factory memory timing
  • 5V JEDEC-standard voltage ensures warranty-safe operation
  • 204-pin SODIMM form factor fits L530 T430 T430i T430s T430si T431s T530
  • Single 1Rx8 module installs easily for DIY upgrade

Specifications

BrandOWC
Part Number1S6D31R804GB
Capacity4GB
Type204-Pin DDR3 Non-ECC SODIMM
SpeedDDR3 1600 (PC3 12800)
CAS LatencyCL11
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkPad L530
Lenovo ThinkPad T430
Lenovo ThinkPad T430i
Lenovo ThinkPad T430s
Lenovo ThinkPad T430si

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Questions about this item

Does the 1.5V DDR3 module run hot or draw extra power during all-day use in a ThinkPad T430?

The SODIMM operates at the standard 1.5V JEDEC voltage with no heat spreader, so it stays within normal thermal limits for continuous laptop workloads.

What must my ThinkPad L530 already have to accept this 204-pin DDR3 1600 upgrade?

A free 204-pin SODIMM slot and a BIOS that supports DDR3 1600 PC3-12800 CL11 non-ECC unbuffered memory.

Will this 1Rx8 4GB stick work alongside the original 2GB or 4GB modules in a T430s?

Yes, it matches the DDR3 1600 CL11 1.5V spec, so it can run in dual-channel with identical or compatible JEDEC modules.

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