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Two black DDR2 UDIMM modules without heat spreaders

OWC

OWC 4GB (2x2GB) DDR2 533 PC2-4200 CL4 240-pin 1.8V Non-ECC UDIMM Kit

SKU CH-TJ8W-QQMPJ

Dual-channel 4 GB DDR2 533 kit with two 2 GB unbuffered DIMMs at CL4 and 1.8 V for desktop upgrades

  • Total capacity4 GB (2 × 2 GB)
  • Rated speedDDR2 533 (PC2 4200)
  • CAS latencyCL4
  • Rated voltage1.8 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 4GB (2 x 2GB)

  • 4GB dual-channel kit expands desktop multitasking headroom
  • DDR2 533 PC2-4200 CL4 timing matches legacy platform specs
  • 240-pin 1.8 V unbuffered non-ECC modules fit standard DIMM slots
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Two matched 2 GB sticks enable straightforward DIY installation

Upgrade Kit for Select Desktops

This OWC kit provides 4GB of DDR2 memory in a matched pair of 2GB modules. It is built for desktop systems that accept 240-pin unbuffered DIMMs running at 1.8V. The dual-channel configuration helps the memory controller move data more efficiently. Installation is a straightforward DIY task for most compatible machines.

Sustained Load Behaviour

JEDEC-standard timings and voltage keep the modules stable during extended work sessions. The CL4 latency at 533 MT/s delivers predictable bandwidth for everyday multitasking and larger file handling. Because every module is tested in-house, the kit maintains consistent throughput without thermal throttling. Users can leave applications open for hours without unexpected slowdowns.

DDR2 533 PC2-4200 Specification

The decisive figure is the DDR2 533 (PC2-4200) rating; only systems designed for this exact speed and voltage will accept the kit. Mixing different speeds or voltages will prevent the memory from functioning. Verify that the target desktop requires DDR2 533 before purchase. No other generation or speed is compatible with these modules.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $31.99
Cheaper than about 77% of the 3,647 comparable items (median $90.99).
Total capacity 4 GB (2 × 2 GB)
Lower than about 80% of the 3,251 comparable items (median 16 GB).
Price per GB $8.00 per GB
Pricier than about 58% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number4U2D22R8004P
Total capacity4 GB (2 × 2 GB)
Product colorBlack
Performance
Rated speedDDR2 533 (PC2 4200)
Memory
CAS latencyCL4
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.8 V
Compatibility
Recommended forDesktops
More details
LED lightingNone

Other versions of this model

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Questions about this item

How much power does each 2 GB DDR2 533 module draw at 1.8 V when the system runs all day?

Each module operates at the JEDEC-standard 1.8 V; the kit contains two 2 GB DIMMs, so total capacity is 4 GB running at DDR2 533 speeds.

What must the desktop already have to accept this 240-pin DDR2 kit?

The board needs two free 240-pin DDR2 slots that support PC2-4200 unbuffered non-ECC memory at 1.8 V.

Will these CL4 DDR2 533 sticks work alongside slower CL5 modules I keep in the other slots?

The kit is rated CL4 at 533 MHz; if mixed with slower modules the system will run all channels at the lowest common speed and latency.

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