PC2100

PC2100 This is DDR (Double Data Rate) memory in 200-pin SO-DIMM form-factor. PC2100 memory is also called DDR266

Available memory types from IBM or Lenovo

Partnumber	FRU	Description
10K0028	10K0029	128MB PC2100 DDR-SDRAM CL2.5 SO-DIMM
10K0030	10K0031	256MB PC2100 DDR-SDRAM CL2.5 SO-DIMM
10K0032	10K0033	512MB PC2100 DDR-SDRAM CL2.5 SO-DIMM
10K0034	10K0035	1GB PC2100 DDR-SDRAM CL2.5 SO-DIMM1

NOTE!

As PC2100 memory is getting increasingly difficult to aquire, PC2700 memory can be used instead. Using PC2700 memory will not increase system performance, as it will be run at only PC2100 speed.

ThinkPads that support this technology

ThinkPad Models	Soldered on systemboard	DIMM Slot 1	DIMM Slot 2	Official Max-Memory	Unofficial Max-Memory2
A31, A31p		Occupied	Empty	1GB3	2GB4 5 7
G40		Occupied	Empty	1GB3	Unknown
R32		Occupied	Empty	1GB3	Unknown
R40 - Celeron or Pentium 4-M		Occupied	Empty	1GB3	Unknown
R40 - Pentium M		Occupied	Empty	2GB4	Unknown
R40e		Occupied	Empty	1GB3	Unknown
T30		Occupied	Empty	1GB3	2GB4 5 7
T40, T40p		Occupied	Empty	2GB4	2GB4 6 7
X31		Occupied	Empty	2GB4	2GB4 6 7

FOOTNOTES [Δ]

1. Only supported with R40 (Pentium M models), T40, T40p and X31
2. See Unofficial_maximum_memory_specs
3. Based on 2x 512MB DIMMs, might require removal of original base memory
4. Based on 2x 1GB DIMMs, requires removal of original base memory
5. DDR SO-DIMM modules exist at a maximum of 1GB. You cannot physically install more than 1 GB per slot.
6. DDR SO-DIMM modules exist at a maximum of 1GB. You cannot physically install more RAM than the official specs state.
7. Chipset is limited to 2GB.