PC2-4200

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PC2-4200

This is DDR2 (Double Data Rate) memory in 200-pin SO-DIMM form-factor.
PC2-4200 memory is also called DDR2-533

Available memory types from IBM or Lenovo

Partnumber FRU Description
73P3840 73P3841 256MB PC2-4200 DDR2 NP CL4 SO-DIMM
73P3842 73P3843 512MB PC2-4200 DDR2 NP CL4 SO-DIMM
73P3844 73P3845 1GB PC2-4200 DDR2 NP CL4 SO-DIMM

ThinkPads that support this technology

ThinkPad Models DIMM Slot 1 DIMM Slot 2 Official
Max-Memory
Unofficial
Max-Memory1
R51e Occupied Empty 2GB2 Unknown
R52 Occupied Empty 2GB2 Unknown
T43, T43p Occupied Empty 2GB2 Unknown
X41, X41 Tablet 256 or 512MB
soldered to systemboard
Empty 1.28 or 1.53GB3 Unknown
Z60m, Z60t Occupied Empty 2GB2 Unknown

FOOTNOTES [Δ]
  1. See Unofficial_maximum_memory_specs
  2. Based on 2x 1GB DIMMs, might require removal of original base memory
  3. Based on base 256 or 512MB plus 1GB DIMM in Slot 2