PC-133

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PC-133

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

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 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
soldered to systemboard		 Empty or
128MB SO-DIMM		 640MB3 Unknown
X23 128MB
soldered to systemboard		 Empty 640MB3 Unknown
X24 128MB
soldered to systemboard		 128MB SO-DIMM 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
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