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Green circuit board with black memory chips and gold edge connectors

OWC

OWC 4GB DDR3 1333 CL9 2Rx8 1.5V SODIMM HP ProBook memory upgrade

SKU CH-ABTA-536J7

4 GB DDR3 1333 CL9 SODIMM upgrade for HP ProBook 4330s, 4331s, 4340s, 4421s and 4430s

  • Capacity4GB
  • Type204-Pin DDR3 Non-ECC SODIMM
  • SpeedDDR3 1333 (PC3 10600)
  • CAS LatencyCL9
  • Voltage1.5V
  • ECCNo
  • 4GB capacity expands multitasking headroom on supported ProBooks
  • DDR3 1333 CL9 speed matches factory memory timing exactly
  • JEDEC and RoHS compliant for warranty-safe operation
  • 204-pin SODIMM form factor fits listed HP ProBook models
  • 5V unbuffered design installs without configuration changes

HP ProBook DDR3 upgrade

This 4GB SODIMM is built for HP ProBook 4330s 4331s 4340s 4421s and 4430s laptops that need a single DDR3 1333 module. It suits owners who want a straightforward capacity increase without changing voltage or timings. It is not for systems that require ECC or registered memory.

Thermals noise and power

The module runs at the standard 1.5V JEDEC voltage and has no heat spreader, so it adds minimal thermal load inside the tight ProBook chassis. Passive operation means zero fan noise from the memory itself. Power draw stays within the laptop's original memory budget.

Build and daily handling

The 204-pin unbuffered stick uses a 2Rx8 organisation and meets JEDEC and ROHS compliance for warranty-safe installation. A single notch key prevents mis-insertion in the SODIMM slot. No extra cables or brackets are needed; the module seats directly in the existing socket.

Highlights

  • 4GB capacity expands multitasking headroom on supported ProBooks
  • DDR3 1333 CL9 speed matches factory memory timing exactly
  • JEDEC and RoHS compliant for warranty-safe operation
  • 204-pin SODIMM form factor fits listed HP ProBook models
  • 5V unbuffered design installs without configuration changes

Specifications

BrandOWC
Part Number1S3D32R804GB
Capacity4GB
Type204-Pin DDR3 Non-ECC SODIMM
SpeedDDR3 1333 (PC3 10600)
CAS LatencyCL9
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemHP ProBook 4330s
HP ProBook 4331s
HP ProBook 4340s
HP ProBook 4421s
HP ProBook 4430s

Other versions of this model

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Questions about this item

How do I install the 204-pin SODIMM in my HP ProBook 4330s, and what step do people often miss?

Power off the laptop, remove the battery, open the memory door, insert the module at a 30-degree angle until the gold contacts disappear, then press down firmly until both side clips click — the step most people miss is pressing down hard enough to engage both clips.

What maintenance or replacement will this 4GB DDR3 module need later?

No routine maintenance is required; the module has no heat spreader and no moving parts, so it only needs replacement if a memory test reports errors or the system fails to recognise the 4GB capacity.

What limit appears first during sustained use of this CL9 1.5V DDR3 SODIMM?

The thermal limit of the unbuffered 2Rx8 chips is reached first; without a heat spreader the module relies on chassis airflow, so prolonged heavy workloads can throttle before the 1333MHz speed ceiling is hit.

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