PC-133

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PC-133

This is 133MHz SDRAM memory in 144-pin SO-DIMM form-factor.

SO-DIMM

Available memory types from IBM

Partnumber FRU Description
19K4650 19K4651 64MB PC133 SDRAM CL3 NP SO-DIMM
19K4652 19K4653 128MB PC133 SDRAM CL3 NP SO-DIMM
19K4654 19K4655 256MB PC133 SDRAM CL3 NP SO-DIMM
19K4656 19K4657 512MB PC133 SDRAM CL3 NP SO-DIMM

ThinkPads that support this technology

ThinkPad Models Soldered
on systemboard
DIMM
Slot 1
DIMM
Slot 2
Official
Max-Memory
Unofficial
Max-Memory1
A30, A30p Occupied Empty 1GB2 Unknown
R304 Occupied Empty 1GB2 Unknown
R31 Occupied Empty 1GB2 Unknown
T23 Occupied Empty 1GB2 Unknown
X22 128MB Empty or
128MB SO-DIMM
NA 640MB3 Unknown
X23 128MB Empty NA 640MB3 Unknown
X24 128MB 128MB SO-DIMM NA 640MB3 Unknown
X30 Occupied Empty 1GB2 Unknown

FOOTNOTES [Δ]
  1. See Unofficial_maximum_memory_specs
  2. Based on 2x 512MB DIMMs, might require removal of original base memory
  3. Based on base 128 plus 512MB DIMM in Slot 2
  4. Ships with PC-133 memory, but runs memory at PC-100 speed