PC-66

PC-66 This is 66MHz SDRAM memory in 144-pin SO-DIMM form-factor.

Available memory types from IBM

Partnumber	FRU	Description
76H0293	42H2818	16MB PC66 SDRAM 3.3v NP SO-DIMM
76H0294	42H2819 10L1226	32MB PC66 SDRAM 3.3v NP SO-DIMM
76H0295 20L0241	42H2820 20L0242	64MB PC66 SDRAM 3.3v NP SO-DIMM
01K1150	01K1151 01K1153	128MB PC66 SDRAM 3.3v NP SO-DIMM

NOTE!

As PC-66 memory is getting increasingly difficult to aquire, PC-100 or PC-133 memory can be used instead. Using PC-100 or PC-133 memory will not increase system performance, as it will be run at only PC-66 speed.

ThinkPads that support this technology

ThinkPad Models	Soldered on systemboard	DIMM Slot 1	DIMM Slot 2	Official Max-Memory	Unofficial Max-Memory1
240	64MB	Empty	NA	192MB2	320MB
390, 390E		Occupied	Empty	256MB3	Unknown
570	64MB	Empty	NA	192MB2	320MB
600 - Pentium		Occupied	Empty	256MB3	Unknown
600 - Pentium II	32MB	Empty or 32MB DIMM	Empty	288MB4	Unknown
600E	32MB	Empty or 32MB DIMM	Empty	288MB4	Unknown
770		Occupied	Empty	256MB5	Unknown
770E, 770ED	32MB	Empty or 32MB DIMM	Empty	288MB4	Unknown
770X	64MB	Empty or 64MB DIMM	Empty	320MB4	Unknown
770Z	64MB	64MB DIMM	Empty	320MB4	Unknown
i Series 1410, i Series 1411, i Series 1450, i Series 1451		Occupied	Empty	256MB3	Unknown
i Series 1412, i Series 1451, i Series 1472		Occupied	Empty	256MB3	Unknown
i Series 1420, i Series 1421, i Series 1441, i Series 1460, i Series 1480		Occupied	Empty	256MB3	Unknown
i Series 1512, i Series 1552		Occupied	Empty	256MB3	Unknown
i Series 1540, i Series 1541, i Series 1560		Occupied	Empty	256MB3	Unknown
i Series 1720, i Series 1721		Occupied	Empty	256MB3	Unknown

FOOTNOTES [Δ]

1. See Unofficial_maximum_memory_specs
2. Based on base 64MB plus 128MB DIMM in Slot 1
3. Based on 2x 128MB DIMMs
4. Based on base memory plus 2x 128MB DIMMs
5. Based on 2x 128MB DIMMs, also supports older EDO memory