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Two green 200-pin DDR1 SODIMM modules with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 2GB (2x1GB) DDR1 333MHz PC2700 SODIMM memory upgrade

SKU CH-JR3F-Q2W5Q

Two 1 GB DDR1 333 MHz SODIMM modules add 2 GB of PC2700 memory to Lenovo ThinkPad R51 notebooks

  • Capacity2GB (2 x 1GB)
  • Type200-Pin DDR SO-DIMM
  • SpeedDDR 333 (PC 2700)
  • CAS LatencyCL2.5
  • Timing2.5-3-3
  • Voltage2.5V
  • 2 GB kit upgrades ThinkPad R51 notebooks
  • 333 MHz DDR1 speed matches PC2700 spec
  • CL2.5 latency and 2.5 V operation
  • 200-pin SODIMM form factor fits R51 slots
  • Two 1 GB modules enable dual-channel bandwidth

Computer Memory Solutions 2GB DDR1 SODIMM kit

This kit supplies two 1GB DDR1 333MHz PC2700 SO-DIMM modules for a total of 2GB. The unbuffered non-ECC sticks run at 2.5V with CL2.5 timing and use major-brand chips on 200-pin boards. They are built to match the specifications of the original IBM Lenovo ThinkPad R51 series notebooks.

Suits ThinkPad R51 owners restoring stock capacity

Notebooks in the ThinkPad R51 1829, 1830, 1831, 1836, 1840, 1841, 2883, 2887, 2888, 2889, 2894 and 2895 families accept this memory directly. Buyers who need ECC registered modules, a different pin count, higher density per stick or a faster DDR generation should look elsewhere.

200-pin DDR1 333MHz SO-DIMM form factor decides fit

The 200-pin DDR1 SO-DIMM interface is the single specification that determines whether the kit will seat and operate in the target machine. Verify that the notebook uses 200-pin DDR1 slots before ordering.

Punti di forza

  • 2 GB kit upgrades ThinkPad R51 notebooks
  • 333 MHz DDR1 speed matches PC2700 spec
  • CL2.5 latency and 2.5 V operation
  • 200-pin SODIMM form factor fits R51 slots
  • Two 1 GB modules enable dual-channel bandwidth

Caratteristiche tecniche

BrandComputer Memory Solutions
ModelCM128642700SO
Capacity2GB (2 x 1GB)
Type200-Pin DDR SO-DIMM
SpeedDDR 333 (PC 2700)
CAS LatencyCL2.5
Timing2.5-3-3
Voltage2.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemIbm Lenovo Thinkpad R51 Notebook Series
Package Content2 Memory RAM Sticks

Domande su questo articolo

Will the 200-pin DDR1 SODIMM sticks need any firmware updates or re-seating over time?

No firmware is involved; the modules are unbuffered, non-ECC DDR1 333 MHz parts. If the laptop is moved frequently, re-seating the 200-pin connectors once every few years can restore a clean contact.

What limit appears first when the ThinkPad R51 runs the 2.5 V memory at full load for hours?

The chipset caps usable memory at 2 GB, so the pair of 1 GB SODIMMs already hits the hard ceiling before any thermal or bandwidth bottleneck arises.

How much heat and fan noise do the two 1 GB DDR333 modules add during all-day use?

They draw 2.5 V with no heat spreaders, so extra warmth is minimal; the R51’s existing fan curve typically stays at idle speed even under sustained memory workloads.

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