PC-133

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PC133

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

SO-DIMM

Available DRAM modules from IBM

SDR type Individual / Single-Pack
Option Marketing Part Number
25-Pack Option
Marketing Part Number
Field Replacement Unit
(FRU) Service Part Number
Non-ECC, unbuffered 1Rx8 64MB PC133 CL3 19K4650 N/A 19K4651
Non-ECC, unbuffered 1Rx8 128MB PC133 CL3 19K4652 N/A 19K4653
Non-ECC, unbuffered 1Rx8 256MB PC133 CL3 19K4654 N/A 19K4655
Non-ECC, unbuffered 2Rx8 512MB PC133 CL3 19K4656 N/A 19K4657

Models that support this technology

Models Soldered
on motherboard
SO-DIMM
Slot 1
SO-DIMM
Slot 2
Official
Max-Memory
Unofficial
Max-Memory
A30, A30p N/A Occupied Depends 1GB1 1GB1
T23 N/A Occupied Depends 1GB1 1GB1
X30 N/A Occupied Depends 1GB1 1GB1
X22, X23, X24 128MB Depends N/A 1GB2 1GB2
R303, R31 N/A Occupied Depends 1GB1 1GB1

FOOTNOTES [Δ]
  1. Attained via two 2Rx8 512MB PC133 non-ECC SO-UDIMMs, not possible with 1Rx8 512MB PC133 non-ECC SO-UDIMMs. Irrelevant uninteresting fun fact: 1GB PC133 SO-DIMMs exist, but they're generally ECC and registered/buffered. Sometimes, they come in 4Rx8 or 2Rx8 configurations, which may not be supported by the memory controllers used in normal laptops.
  2. Attained via one 2Rx8 512MB PC133 non-ECC SO-UDIMMs, not possible with 1Rx8 512MB PC133 non-ECC SO-UDIMMs.
  3. Comes with factory-installed PC133 SDRAM for some reason, but the memory controller is limited to PC100 speeds.

Available DRAM modules from other companies

Manufacturer Partnumber Description Tested on model
TBD TBD TBD TBD