Difference between revisions of "PC-100"

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=== PC-100 ===
+
{{NOTE|As PC100 is getting increasingly difficult to acquire, PC133 can be used instead. Using PC133 may or may not increase the performance of your model, as some models may underclock it to their respective original DRAM speeds.}}
This is 100MHz SDRAM memory in 144-pin SO-DIMM form-factor.
+
=== PC100 ===
 
+
This is SDRAM at 100 MHz in a 144-pin SO-DIMM form-factor.
 
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|}
 
|}
  
=== Available memory types from IBM ===
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=== Available DRAM modules from IBM ===
 
{| border=1 cellspacing=0 cellpadding=2
 
{| border=1 cellspacing=0 cellpadding=2
 
|- style="background:#ffdead;white-space:nowrap;"
 
|- style="background:#ffdead;white-space:nowrap;"
! Partnumber !! FRU !! Description
+
|'''SDR type'''
 +
|'''Option Part Number<br>(OPT)'''
 +
|'''Field Replacement Unit<br>(FRU)'''
 
|-
 
|-
| 20L0253 || 20L0263 || 32MB PC100 SDRAM NP SO-DIMM
+
|Non-ECC, unbuffered 1Rx16 32MB PC100 CL2
 +
|20L0253
 +
|20L0263
 
|-
 
|-
| 20L0254 || 20L0264 || 64MB PC100 SDRAM NP SO-DIMM
+
|Non-ECC, unbuffered 1Rx8 64MB PC100 CL2
 +
|20L0254
 +
|20L0264
 
|-
 
|-
| 20L0255 || 20L0265 || 128MB PC100 SDRAM NP SO-DIMM
+
|Non-ECC, unbuffered 1Rx8 128MB PC100 CL2
 +
|20L0255
 +
|20L0265
 
|-
 
|-
| 33L3069 || 33L3070 || 256MB PC100 SDRAM NP SO-DIMM
+
|Non-ECC, unbuffered 2Rx8 256MB PC100 CL2
 +
|33L3069
 +
|33L3070
 
|}
 
|}
{{NOTE|As PC-100 memory is getting increasingly difficult to aquire, [[PC-133]] memory may be substituted on some models. Using PC-133 memory will not increase system performance, as it will be run at only PC-100 speed. PC133 memory cannot be used on T20, T21, or T22 models.}}
 
  
=== ThinkPads that support this technology ===
+
=== Models that support this technology ===
 
{| border=1 cellspacing=0 cellpadding=2
 
{| border=1 cellspacing=0 cellpadding=2
 
|- style="background:#ffdead;white-space:nowrap;"
 
|- style="background:#ffdead;white-space:nowrap;"
! ThinkPad Models !! Soldered<br>on systemboard !! DIMM<br>Slot 1 !! DIMM<br>Slot 2 !! Official<br>Max-Memory !! Unofficial<br>Max-Memory{{Footnote|1}}
+
! Models !! Soldered<br>on motherboard !! SO-DIMM<br>Slot 1 !! SO-DIMM<br>Slot 2 !! Official<br>Max-Memory !! [[Unofficial maximum memory specs|Unofficial<br>Max-Memory]]
 
|-
 
|-
| {{240X}} || 64MB || Empty || NA || 192MB{{Footnote|5}} || 256MB
+
| {{240X}}, {{240Z}}, {{i1124}} || 64 or 128MB (240Z) || Depends || N/A || 192 or 256MB (240Z) || 192 or 256MB (240Z){{footnote|3}}
 
|-
 
|-
| {{390X}} || || Occupied || Empty || 512MB{{Footnote|2}} || Unknown
+
| {{390X}}, {{i1700}}<br>{{i1780}}, {{i1781}} || N/A || Occupied || Depends || 256MB || 512MB{{footnote|2}}
 
|-
 
|-
| {{570E}} || 64MB || Empty || NA || 320MB{{Footnote|6}} || Unknown
+
| {{570E}}, {{i1157}} || 64MB || Depends || N/A || 192MB || 320MB{{footnote|1}}
 
|-
 
|-
| {{600X}} || 64MB || Occupied || Empty || 576MB{{Footnote|3}} || Unknown
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| {{600X}} || 64MB || Occupied || Depends || 320MB || 576MB{{footnote|2}}
 
|-
 
|-
| {{770X}} || 64MB || Occupied || Empty || Unknown || 448MB{{Footnote|7}} or 512MB{{Footnote|2}}
+
| {{A20m}}, {{A20p}} || N/A || Occupied || Depends || 256MB || 512MB{{footnote|2}}
 
|-
 
|-
| {{A20m}}, {{A20p}} || || Occupied || Empty || 512MB{{Footnote|2}} || Unknown
+
| {{A21e}}{{footnote|5}}, {{A21m}}, {{A21p}} || N/A || Occupied || Depends || 256MB || 512MB{{footnote|2}}
 
|-
 
|-
| {{A21e}} || || Occupied || Empty || 256MB{{Footnote|4}} || Unknown
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| {{A22e}}{{footnote|5}}, {{A22m}}, {{A22p}} || N/A || Occupied || Depends || 256MB || 512MB{{footnote|2}}
 
|-
 
|-
| {{A21m}}, {{A21p}} || || Occupied || Empty || 512MB{{Footnote|2}} || Unknown{{Footnote|8}}
+
| {{A21e}}, {{A22e}}, {{i1800}} || N/A || Occupied || Depends || 128MB || 256MB{{footnote|4}}
 
|-
 
|-
| {{A22e}} - Celeron || || Occupied || Empty || 256MB{{Footnote|4}} || <384MB
+
| {{T20}}, {{T21}}, {{T22}} || N/A || Occupied || Depends || 256MB || 512MB{{footnote|2}}
 
|-
 
|-
| {{A22e}} - Pentium III || || Occupied || Empty || 512MB{{Footnote|2}} || Unknown
+
| {{X20}}, {{X21}}<br>{{i1620}}, {{TransNote}} || 64 or 128MB (X21) || Depends || N/A || 192 or 256MB (X21) || 320 or 384MB (X21){{footnote|1}}
 
|-
 
|-
| {{A22m}}, {{A22p}} || || Occupied || Empty || 512MB{{Footnote|2}} || Unknown
+
| {{S30}}, {{S31}} || 128MB || Depends || N/A || 256MB || 256MB{{footnote|3}}
 
|-
 
|-
| {{S30}}, {{S31}} || 128MB || Empty || NA || 256MB{{Footnote|5}} || Unknown
+
| {{i1200}}, {{i1210}}, {{i1230}}<br>{{i1250}}, {{i1260}}, {{i1300}}<br>{{i1330}}, {{i1370}}, {{130}} || 32 (1210) or 64MB || Depends || N/A || 160 (1210) or 192MB || 160 (1210) or 192MB{{footnote|3}}
 
|-
 
|-
| {{T20}}, {{T21}}, {{T22}} || || Occupied || Empty || 512MB{{Footnote|2}} || Unknown
+
| {{i1422}}, {{i1442}}, {{i1482}}<br>{{i1483}}, {{i1492}} || N/A || Occupied || Depends || 256MB || 512MB{{footnote|2}}
 
|-
 
|-
| {{TransNote}} || 64MB || Empty || NA || 320MB{{Footnote|6}} || Unknown
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| {{i1542}}, {{i1562}}, {{i1592}} || N/A || Occupied || Depends || 256MB || 512MB{{footnote|2}}
 +
|}
 +
{{footnotes|
 +
#Attained via one 2Rx8 256MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
 +
#Attained via two 2Rx8 256MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
 +
#Attained via one 1Rx8 128MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
 +
#Attained via two 1Rx8 128MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
 +
#These are uncommon models that utilize the 82443BX memory controller, which allows them to accept 512MB of RAM in total. Not all of them come with this specific memory controller however, as some are limited to 256MB due to their 82443MX memory controller.
 +
}}
 +
 
 +
== Available DRAM modules from other companies ==
 +
{| border=1 cellspacing=0 cellpadding=2
 +
|- style="background:#ffdead;white-space:nowrap;"
 +
! Manufacturer !! Partnumber !! Description !! Tested on model
 
|-
 
|-
| {{X20}} || 64MB || Empty or<br>64MB DIMM|| NA || 320MB{{Footnote|6}} || Unknown
+
| TBD || TBD || TBD || TBD
|-
+
| {{X21}} || 64 or 128MB|| Empty|| NA || 320MB or 384MB{{Footnote|6}} || Unknown
+
|-
+
| {{i1200}} || 32 or 64MB|| Empty|| NA || 160 or 192MB{{Footnote|5}} || PC133/256MB{{Footnote|6}}
+
|-
+
| {{i1210}} || 32MB|| Empty|| NA || 160MB{{Footnote|5}} || Unknown
+
|-
+
| {{i1230}},<br>{{i1250}}, {{i1260}} || 64MB|| Empty|| NA || 192MB{{Footnote|5}} || Unknown
+
|-
+
| {{i1300}}, {{i1330}},<br>{{i1370}} || 64MB|| Empty|| NA || 192MB{{Footnote|5}} || Unknown
+
|-
+
| {{i1422}}, {{i1442}},<br>{{i1482}}, {{i1483}},<br>{{i1492}} || || Occupied|| Empty || 256MB{{Footnote|4}} || Unknown
+
|-
+
| {{i1542}}, {{i1562}},<br>{{i1592}} || || Occupied|| Empty || 256MB{{Footnote|4}} || Unknown
+
 
|}
 
|}
{{Footnotes|
+
 
# See [[Unofficial_maximum_memory_specs]]
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[[Category:DRAM]]
# Based on 2x 256MB DIMMs, might require removal of original base memory
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# Based on base 64MB plus 2x 256MB DIMM in Slots 1 and 2
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# Based on 2x 128MB DIMMs, might require removal of original base memory
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# Based on base memory plus 128MB DIMM in Slot 1
+
# Based on base memory plus 256MB DIMM in Slot 1
+
# Based on [http://www.mac-how.net/ Mac-How]
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# Based on base 64MB plus 1x 256MB and 1x 128MB DIMMs in Slots 1 and 2
+
# Intel 440BX motherboard accepts up to 128 Mbit (''not '''Mbyte''''') chips on the SODIMM, i.e.: 16MX8, 32MX4, etc.  A 256MB SODIMM '''must''' have 16 visible chips to be compatible.  512MB per slot, for a total of 1GB, is theoreticaly possible; "stacked" SODIMMS with 32 128Mb chips exist, but they're rare, expensive, and may not fit in the RAM slots with the cover closed.}}
+
[[Category:Components]]
+

Latest revision as of 00:04, 6 November 2020

NOTE!
As PC100 is getting increasingly difficult to acquire, PC133 can be used instead. Using PC133 may or may not increase the performance of your model, as some models may underclock it to their respective original DRAM speeds.

PC100

This is SDRAM at 100 MHz in a 144-pin SO-DIMM form-factor.

SO-DIMM

Available DRAM modules from IBM

SDR type Option Part Number
(OPT)
Field Replacement Unit
(FRU)
Non-ECC, unbuffered 1Rx16 32MB PC100 CL2 20L0253 20L0263
Non-ECC, unbuffered 1Rx8 64MB PC100 CL2 20L0254 20L0264
Non-ECC, unbuffered 1Rx8 128MB PC100 CL2 20L0255 20L0265
Non-ECC, unbuffered 2Rx8 256MB PC100 CL2 33L3069 33L3070

Models that support this technology

Models Soldered
on motherboard
SO-DIMM
Slot 1
SO-DIMM
Slot 2
Official
Max-Memory
Unofficial
Max-Memory
240X, 240Z, i Series 1124 64 or 128MB (240Z) Depends N/A 192 or 256MB (240Z) 192 or 256MB (240Z)3
390X, i Series 1700
i Series 1780, i Series 1781
N/A Occupied Depends 256MB 512MB2
570E, i Series 1157 64MB Depends N/A 192MB 320MB1
600X 64MB Occupied Depends 320MB 576MB2
A20m, A20p N/A Occupied Depends 256MB 512MB2
A21e5, A21m, A21p N/A Occupied Depends 256MB 512MB2
A22e5, A22m, A22p N/A Occupied Depends 256MB 512MB2
A21e, A22e, i Series 1800 N/A Occupied Depends 128MB 256MB4
T20, T21, T22 N/A Occupied Depends 256MB 512MB2
X20, X21
i Series 1620, TransNote
64 or 128MB (X21) Depends N/A 192 or 256MB (X21) 320 or 384MB (X21)1
S30, S31 128MB Depends N/A 256MB 256MB3
i Series 1200, i Series 1210, i Series 1230
i Series 1250, i Series 1260, i Series 1300
i Series 1330, i Series 1370, 130
32 (1210) or 64MB Depends N/A 160 (1210) or 192MB 160 (1210) or 192MB3
i Series 1422, i Series 1442, i Series 1482
i Series 1483, i Series 1492
N/A Occupied Depends 256MB 512MB2
i Series 1542, i Series 1562, i Series 1592 N/A Occupied Depends 256MB 512MB2

FOOTNOTES [Δ]
  1. Attained via one 2Rx8 256MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
  2. Attained via two 2Rx8 256MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
  3. Attained via one 1Rx8 128MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
  4. Attained via two 1Rx8 128MB PC100 non-ECC SO-UDIMMs, not possible with 1Rx8 256MB PC100 non-ECC SO-UDIMMs.
  5. These are uncommon models that utilize the 82443BX memory controller, which allows them to accept 512MB of RAM in total. Not all of them come with this specific memory controller however, as some are limited to 256MB due to their 82443MX memory controller.

Available DRAM modules from other companies

Manufacturer Partnumber Description Tested on model
TBD TBD TBD TBD