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Two green DDR2 SO-DIMM sticks with gold contacts

OWC

OWC 4GB (2x2GB) DDR2 533 PC2-4200 CL4 200-pin laptop RAM

SKU CH-042E-2MW0K

Dual-channel 4 GB DDR2 533 kit with two 2 GB SO-DIMMs at CL4 and 1.8 V for compatible laptops and all-in-one systems

  • Capacity4GB (2 x 2GB)
  • Type200-Pin DDR2 SO-DIMM
  • SpeedDDR2 533 (PC2 4200)
  • CAS LatencyCL4
  • Voltage1.8V
  • ECCNo
  • Dual-channel kit doubles bandwidth with two matched 2GB modules
  • JEDEC-standard DDR2 533 CL4 ensures broad laptop compatibility
  • 8V unbuffered non-ECC design fits standard 200-pin SO-DIMM slots
  • Tested to meet OEM specs for reliable multitasking performance
  • Cost-effective 4GB upgrade extends usable life of older systems

Compatible upgrade kit for DDR2 laptops

This OWC kit supplies two 2 GB DDR2 533 SO-DIMM modules for a total of 4 GB. It targets owners of older laptops, all-in-one PCs or compatible NAS units that accept 200-pin PC2-4200 memory. The dual-channel pair is designed to match factory specifications for a straightforward capacity increase.

Verify slot count and maximum supported memory

Before ordering, confirm that your system uses 200-pin DDR2 SO-DIMM slots and can address 4 GB in total. Check the manufacturer documentation for the maximum capacity per slot and whether the BIOS requires matched pairs. The modules run at 1.8 V with CL4 latency and are unbuffered, non-ECC parts.

JEDEC-compliant modules with lifetime support

Each stick is tested to meet JEDEC and RoHS standards, ensuring a warranty-safe upgrade without voltage or timing surprises. OWC backs the kit with a limited lifetime warranty and free technical support, while the dual-channel configuration helps the memory controller operate at its rated bandwidth. No heat spreaders or extra software are included.

Highlights

  • Dual-channel kit doubles bandwidth with two matched 2GB modules
  • JEDEC-standard DDR2 533 CL4 ensures broad laptop compatibility
  • 8V unbuffered non-ECC design fits standard 200-pin SO-DIMM slots
  • Tested to meet OEM specs for reliable multitasking performance
  • Cost-effective 4GB upgrade extends usable life of older systems

Specifications

BrandOWC
Part Number4S2D22R8004P
Capacity4GB (2 x 2GB)
Type200-Pin DDR2 SO-DIMM
SpeedDDR2 533 (PC2 4200)
CAS LatencyCL4
Voltage1.8V
ECCNo
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
Heat SpreaderNo
Recommend UseLaptops, All-in-One Systems, and NAS Systems

Questions about this item

Does the kit include anything besides the two 2 GB DDR2 SODIMMs?

The upgrade kit contains two 200-pin DDR2 533 CL4 modules rated at 1.8 V and nothing else.

Should I choose this dual-channel kit or look for a single 4 GB stick?

The matched pair is designed for dual-channel laptops and all-in-ones, giving the full 4 GB across two slots with identical timing.

What does the PC2-4200 label mean for actual throughput once installed?

PC2-4200 indicates a peak transfer rate of 4 200 MB/s at 533 MT/s, the standard ceiling for DDR2 533 modules.

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