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Two green 200-pin DDR2 SODIMM modules with black chips

Computer Memory Solutions

Computer Memory Solutions CM128644200SODR 2GB (2x1GB) DDR2 533MHz SODIMM memory upgrade

SKU CH-TX7H-1XWBA

A 2 GB dual-stick DDR2 SODIMM kit running at 533 MHz for the ThinkPad R51e 1843

  • Capacity2GB (2 x 1GB)
  • Type200-Pin DDR2 SO-DIMM
  • SpeedDDR2 533 (PC2 4200)
  • CAS LatencyCL4
  • Timing4-4-4
  • Voltage1.8V
  • 2GB total capacity from two 1GB modules
  • DDR2 533MHz speed matches PC2-4200 specification
  • CL4 latency with 4-4-4 timing for responsive access
  • Unbuffered non-ECC design fits standard laptop slots
  • Guaranteed compatible with Lenovo ThinkPad R51e 1843

DDR2 533 MHz SO-DIMM kit

This kit contains two 1 GB 200-pin DDR2 533 (PC2-4200) SO-DIMM modules for a total of 2 GB. It is built for the Lenovo ThinkPad R51e 1843 with a Celeron M 1.5 GHz processor. The modules are unbuffered, non-ECC, CL4 timing and run at 1.8 V. Buyers who need a higher capacity than 2 GB or a newer memory standard cannot use this kit.

DDR2 platform ceiling

DDR2 533 is the fastest speed the ThinkPad R51e 1843 chipset accepts, so the system will not run memory at a higher data rate. The board has only two SO-DIMM sockets and the vendor lists a maximum of 2 GB total, so this kit already fills the platform limit. Builders who want to exceed that ceiling must change the laptop.

2 GB matched pair

The package supplies two identical 1 GB sticks (2Rx8) tested as a matched pair for dual-channel operation in the two available slots. Installing this kit reaches the 2 GB maximum the manufacturer specifies for the R51e 1843. Anyone needing more memory than 2 GB will have to select a different system.

商品特色

  • 2GB total capacity from two 1GB modules
  • DDR2 533MHz speed matches PC2-4200 specification
  • CL4 latency with 4-4-4 timing for responsive access
  • Unbuffered non-ECC design fits standard laptop slots
  • Guaranteed compatible with Lenovo ThinkPad R51e 1843

商品規格

BrandComputer Memory Solutions
ModelCM128644200SODR
Capacity2GB (2 x 1GB)
Type200-Pin DDR2 SO-DIMM
SpeedDDR2 533 (PC2 4200)
CAS LatencyCL4
Timing4-4-4
Voltage1.8V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemLenovo Thinkpad R51E 1843 Celeron M 1.5 Ghz
Package Content2 Memory RAM Sticks

商品問答

Is this 2 GB kit the correct capacity for my ThinkPad R51e 1843, or should I look for a different size?

The R51e 1843 supports a maximum of 2 GB across its two slots, so this 2 x 1 GB kit fills the system to its limit.

What does the PC2-4200 / 533 MHz rating mean once the modules are installed in the laptop?

The memory will run at 533 MHz with CL4 timing at 1.8 V, delivering the standard DDR2 bandwidth the chipset expects.

Will these 200-pin DDR2 SODIMMs work in any other DDR2 laptop, or are they locked to the R51e?

They follow the 200-pin DDR2 SODIMM standard, so they fit any notebook that accepts PC2-4200 unbuffered non-ECC modules.

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