각 기종별 최대 메모리 사이즈

ThinkPad system	Memory description	Memory speed	Maximum memory size
Current ThinkPad systems
A20m, A20p, A21m, A21p, A22e (Pentium), A22m, A22p	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	512MB
A21e (2655), A22e (Celeron)	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	256MB
A21e (2628)	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	256MB
A30, A30p	PC133 SDRAM 144-pin non-parity SoDIMM	133MHz	1GB
A31, A31p	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	1GB
G40	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	1GB
G41	PC2700 DDR SDRAM 200-pin non-parity SoDIMM	266MHz	1GB
R30, R31	PC133 SDRAM 144-pin non-parity SoDIMM	133MHz	1GB
R32	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	1GB
R40(Pentium 4 and Celeron models), R40e	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	1GB
R40 (Pentium M models)	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	2GB
R50e	PC2700 DDR SDRAM 200-pin non-parity SoDIMM	266MHz	2GB
R50, R50p	PC2700 DDR SDRAM 200-pin non-parity SoDIMM Note: PC2100 is supported at 266MHz	333MHz	2GB
R51	PC2700 DDR SDRAM 200-pin non-parity SoDIMM	333MHz	2GB
R52	PC2-4200 CL4 SDRAM 200-pin non-parity SoDIMM	533HMz	2GB
T20, T21, T22	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	512MB
T23	PC133 SDRAM 144-pin non-parity SoDIMM	133MHz	1GB
T30	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	1GB
T40, T40p	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	2GB
T41, T41p, T42, T42p	PC2700 DDR SDRAM 200-pin non-parity SoDIMM Note: PC2100 is supported at 266MHz (1)	333MHz	2GB
T43, T43p	PC2-4200 CL4 SDRAM 200-pin non-parity SoDIMM	533HMz	2GB
X20, X21	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	320MB
X22, X23, X24	PC133 SDRAM 144-pin non-parity SoDIMM	133MHz	640MB
X30	PC133 SDRAM 144-pin non-parity SoDIMM	133MHz	1GB
X31	PC2100 DDR SDRAM 200-pin non-parity SoDIMM (1)	266MHz	1GB
X32	PC2100 or PC2700 DDR SDRAM 200-pin non-parity SoDIMM	266MHz	2GB
X40	PC2700 DDR SDRAM 200-pin non-parity SoDIMM Note: PC2100 is supported at 266MHz (1)	333MHz	1280MB
X41	PC2-4200 CL4 SDRAM 200-pin non-parity SoDIMM	533HMz	1.5GB
X41 Tablet	PC2-4200 CL4 SDRAM 200-pin non-parity SoDIMM	533HMz	1.5GB
Note: (1) PC2100 memory option parts are no longer available. Please substitute the corresponding PC2700 memory option parts.
ThinkPad system	Memory description	Memory speed	Maximum memory size
Older ThinkPad systems
i Series 1200, 1300	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	192MB
390, 390E	SDRAM 144-pin non-parity SoDIMM	66MHz	256MB
390X	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	512MB
570	SDRAM 144-pin non-parity SoDIMM	66MHz	192MB
570E	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	320MB
600, 600E	SDRAM 144-pin non-parity SoDIMM	66MHz	288MB
600X	PC100 SDRAM 144-pin non-parity SoDIMM	100MHz	576MB
770, 770E, 770ED	SDRAM 144-pin non-parity SoDIMM	66MHz	288MB
770X, 770Z	SDRAM 144-pin non-parity SoDIMM	66MHz	320MB