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Memory > IBM ThinkPad Standard Memory Specification Guide

IBM ThinkPad Standard Memory Specification Guide

The guide below shows you the standard memory configuration for the IBM ThinkPad models when they are shipped from the manufacturer.

Please note however that the information below should be used as a general guide and you should always refer to your owner's manual for the exact memory configuration for your IBM ThinkPad, or you can contact EDGE Tech Corp's Technical Support Team for assistance.

ThinkPad Model Speed of RAM Fixed RAM Maximum RAM Standard RAM # Banks # Sockets Chipset
220 60ns 2MB 6MB 2MB 1 1
230Cs 70ns 4MB 20MB 4MB 1 1
240 66MHz 64MB 192MB 64MB 1 1
240X 51U PC-100 64MB 192MB 64MB 1 1
240X 52U PC-100 64MB 192MB 64MB 1 1
240X 61U PC-100 64MB 192MB 64MB 1 1
240X 62U PC-100 64MB 192MB 64MB 1 1
310 70ns NONE 64MB 16MB 2 2
310ED 70ns NONE 64MB 16MB 2 2
310XD 70ns NONE 64MB 16MB 2 2
315 70ns NONE 64MB 16MB 2 2
330 N/A 2MB 12MB 2/4MB 3 3
340 N/A 4MB 12MB 4MB 1 1
345C N/A 4MB 20MB 4MB 1 1
345Cs N/A 4MB 20MB 4MB 1 1
350 70ns 4MB 20MB 4MB 1 1
350C 70ns 4MB 20MB 4MB 1 1
355 N/A 4MB 20MB 4MB 1 1
355 N/A 4MB 20MB 4MB 1 1
355C N/A 4MB 20MB 4MB 1 1
355Cs N/A 4MB 20MB 4MB 1 1
360 N/A 4MB 20MB 4MB 1 1
360 N/A 4MB 20MB 4MB 1 1
360C N/A 4MB 20MB 4MB 1 1
360Ce N/A 4MB 20MB 4MB 1 1
360Cs N/A 4MB 20MB 4MB 1 1
360CSe N/A 4MB 20MB 4MB 1 1
360P N/A 4MB 20MB 4MB 1 1
360Pe N/A 4MB 20MB 4MB 1 1
365C 70ns 8MB 24MB 8MB 1 1
365CD 70ns 8MB 24MB 8MB 1 1
365CS 70ns 8MB 24MB 8MB 1 1
365CSD 70ns 8MB 24MB 8MB 1 1
365E 70ns 8MB 24MB 8MB 1 1
365ED 70ns 8MB 24MB 8MB 1 1
365X 60ns 8MB 40MB 8MB 1 1
365XD 60ns 8MB 40MB 8MB 1 1
370C 70ns 4MB 36MB 4MB 1 1
380 60ns 16MB 48MB 16MB 1 1
380D 60ns 16/32MB 80/96MB 16/32MB 1 1
380E 60ns 16/32MB 80/96MB 16/32MB 1 1
380E 3635-40U 60ns 16MB 80MB 16MB 1 1
380ED 60ns 16/32MB 80/96MB 16/32MB 1 1
380ED 2635-5AU 60ns 16MB 80MB 16MB 1 1
380ED 2635-6AU 60ns 16MB 80MB 16MB 1 1
380ED 2635-7AU 60ns 16MB 80MB 16MB 1 1
380XD 60ns 16/32MB 80/96MB 16/32MB 1 1
380XD 2635-8AU 60ns 32MB 96MB 32MB 1 1
380XD 2635-9AU 60ns 32MB 96MB 32MB 1 1
380XD 2635-AAU 60ns 32MB 96MB 32MB 1 1
380XD 2635-BAU 60ns 32MB 96MB 32MB 1 1
380XD 2635-EAU 60ns 32MB 96MB 32MB 1 1
380XD 2635-FAU 60ns 32MB 96MB 32MB 1 1
380Z 2635-Hxx 60ns 32MB 160MB 32MB 1 1
380Z 2635-Jxx 60ns 32MB 160MB 32MB 1 1
385 60ns 16MB 48MB 16MB 1 1
385E 60ns 8/16MB 72/80MB 8/16MB 1 1
385ED 60ns 8/16MB 72/80MB 8/16MB 1 1
385XD 60ns 16/32MB 80/96MB 16/32MB 1 1
390 66MHz NONE 256MB 32/64MB 2 2
390E 66MHz NONE 256MB 32/64MB 2 2
390X PC-100 0MB 512MB 32MB 2 2 N/A
390X 2626-LxU PC-100 0MB 512MB 32/64MB 2 2 N/A
390X 2626-MxU PC-100 0MB 512MB 32/64MB 2 2 N/A
500 70ns 4MB 12MB 4MB 1 1
500C 70ns 4MB 12MB 4MB 1 1
510Cs 70ns 4MB 20MB 4MB 1 1
535 60ns 16/32MB 96MB 16/32MB 1 1
560 60ns 16/32MB 96MB 16/32MB 1 1
560 2640-1xU 60ns 8/16MB 72/80MB 8/16MB 1 1
560 2640-2xU 60ns 8/16MB 72/80MB 8/16MB 1 1
560 2640-5xx 60ns 8/16MB 72/80MB 8/16MB 1 1
560E 60ns 16/32MB 96MB 16/32MB 1 1
560E 2640-3xU 60ns 8/16MB 72/80MB 8/16MB 1 1
560E 2640-4xU 60ns 8/16MB 72/80MB 8/16MB 1 1
560X 60ns 16/32MB 96MB 16/32MB 1 1
560X 2640-70U 60ns 32/64MB 96/128MB 32/64MB 1 1
560Z 2640-9xx 60ns 32/64MB 96/128MB 32/64MB 1 1
560Z 2640-Bxx 60ns 32/64MB 96/128MB 32/64MB 1 1
570 2644-1AU 66MHz 64MB 192MB 64MB 1 1
570 2644-1BU 66MHz 64MB 192MB 64MB 1 1
570 2644-2AU 66MHz 64MB 192MB 64MB 1 1
570 2644-3AU 66MHz 64MB 192MB 64MB 1 1
570 2644-3BU 66MHz 64MB 192MB 64MB 1 1
570E 2644-5xx PC-100 64MB 320MB 64MB 1 1
570E 2644-6xx PC-100 64MB 320MB 64MB 1 1
600 2645-21U 66MHz 32MB 288MB 32MB 2 2
600 2645-31U 66MHz 32MB 288MB 32MB 2 2
600 2645-35U 66MHz 32MB 288MB 32/64MB 2 2
600 2645-41U 66MHz 32MB 288MB 32MB 2 2
600 2645-45U 66MHz 32MB 288MB 32/64MB 2 2
600 2645-51U 66MHz 32MB 288MB 32MB 2 2
600 2645-A1U 66MHz 32MB 288MB 32/64MB 2 2
600-2645-85U 66MHz 32MB 288MB 32/64MB 2 2
600E 2645-3AU 66MHz 32MB 288MB 32/64MB 2 2
600E 2645-45U 66MHz 32MB 288MB 32/64MB 2 2
600E 2645-4AU 66MHz 32MB 288MB 32/64MB 2 2
600E 2645-55U 66MHz 32MB 288MB 32/64MB 2 2
600E 2645-5AU 66MHz 32MB 288MB 32/64MB 2 2
600E 2645-8AU 66MHz 32MB 288MB 32/64MB 2 2
600E 2645-AAU 66MHz 32MB 288MB 32/64MB 2 2
600X (2645-xxx) PC-100 64MB 576MB 64MB 2 2 N/A
660X 2645-xEU PC-100 64MB 576MB 64MB 2 2
700 60ns 4MB 16MB 4MB 2 2
700C 60ns 4MB 16MB 4MB 2 2
701 60ns 4/8MB 36/40MB 4/8MB 1 1
701C DX2/50 60ns 4/8MB 36/40MB 4/8MB 1 1
701C DX4/75 (AKA Butterfly) 60ns 4/8MB 36/40MB 4/8MB 1 1
701CS 60ns 4/8MB 36/40MB 4/8MB 1 1
701CS 486DX2/50 60ns 4/8MB 36/40MB 4/8MB 1 1
701CS 486DX4/75 60ns 4/8MB 36/40MB 4/8MB 1 1
710T 70ns 4MB 12MB 4MB 1 1
720 60ns 4MB 16MB 4MB 2 2
720C 60ns 4MB 16MB 4MB 2 2
730T N/A 4/8MB 20/24MB 4/8MB 1 1
730TE N/A 4/8MB 20/24MB 4/8MB 1 1
750C 70ns 4MB 36MB 4MB 2 2
750cDX4 60ns 4MB 16MB 4MB 2 2
750Ce 70ns 4MB 36MB 4MB 2 2
750Cs 70ns 4MB 36MB 4MB 2 2
750P 70ns 4MB 36MB 4MB 2 2
755C 70ns 4MB 36MB 4MB 1 1
755CD 60ns NONE 32MB 4MB 1 1
755CDV 60ns NONE 32MB 4MB 1 1
755CDX2 60ns 8MB 40MB 8MB 1 1
755CDX4 60ns 8MB 40MB 8MB 1 1
755CE 60ns 8MB 40MB 8MB 1 1
755CS 70ns 4MB 36MB 4MB 1 1
755CSE 60ns 8MB 40MB 8MB 1 1
755CV 70ns 4MB 36MB 4MB 1 1
755CX 70ns 4MB 36MB 4MB 1 1
760E 60ns 8/16MB 72/80MB 8/16MB 2 2
760ED 60ns 8/16MB 72/80MB 8/16MB 2 2
760EL 60ns 8/16MB 72/80MB 8/16MB 2 2
760ELD 60ns 8/16MB 72/80MB 8/16MB 2 2
760EX 60ns 8/16MB 72/80MB 8/16MB 2 2
760X 60ns 8/16MB 72/80MB 8/16MB 2 2
760XD 70ns 16MB 104MB 16/32MB 2 2
760XL 70ns 16MB 104MB 16/32MB 2 2
765D 70ns 16MB 104MB 16/32MB 2 2
765L 70ns 16MB 104MB 16/32MB 2 2
770 66MHz 32MB 288MB 32/64MB 2 2
770E 66MHz 32MB 288MB 32/64MB 2 2
770ED 66MHz 32MB 288MB 32/64MB 2 2
770X 66MHz 64MB 320MB 128MB 2 2
770Z 66MHz 64MB 320MB 128MB 2 2
820 70ns 32MB 64MB 32MB 2 2
850 70ns 32MB 96MB 32MB 2 2
A Series 2628-xxx PC-100 0MB 512MB 64/128MB 2 2
A Series 2629-xxx PC-100 0MB 512MB 64/128MB 2 2
A20m PC-100 0MB 512MB 2 2
A20p PC-100 0MB 512MB 2 2
A21e PC-100 0MB 64MB 2 2
A21m PC-100 0MB 512MB 2 2
A21p PC-100 0MB 512MB 2 2
A22e PC-100 0MB 128MB 2 2
A22m 2628-xxx PC-100 0MB 512MB 128MB 2 2
A22p PC-100 0MB 512MB 128MB 2 2
A30 2652-xxx PC-133 0MB 1GB 128MB 2 2 Intel 830MP
A30p 2653-xxx PC-133 0MB 1GB 128MB 2 2 Intel 830MP
A31 2652-DxU PC-2100 0MB 1GB 256MB 2 2 Intel 845MP
A31p PC-2100 0MB 1GB 256MB 2 2 Intel 845
G40 PC-2100 0MB 1GB 256MB 2 2 N/A
G41 (2881-xxx) PC-2700 0MB 2GB 256/512MB 2 2 N/A
R30 2656-xxx PC-133 0MB 1GB 128MB 2 2 Intel 830MP
R31 PC-133 0MB 1GB 256MB 2 2 Intel 830MG
R32 2658-xxx PC-2100 0MB 1GB 256MB 2 2
R40 PC-2100 0MB 2GB 256MB 2 2 N/A
R40e PC-2100 0MB 1GB 256MB 2 2 N/A
R50 PC-2700 0MB 2GB 256/512MB 2 2 N/A
R50e PC-2700 0MB 2GB 256/512MB 2 2 N/A
R50p PC-2700 0MB 2GB 512MB 2 2 N/A
R51 (1829 1830-xxx) PC-2700 0MB 2GB 256/512MB 2 2 N/A
R51 (1831, 1836-xxx) PC-2700 0MB 2GB 256/512MB 2 2 N/A
R51 (2883, 2887, 2888-xxx) PC-2700 0MB 2GB 256/512MB 2 2 N/A
R51 (2889, 2894, 2495-xxx) PC-2700 0MB 2GB 256/512MB 2 2 N/A
R51e (1843-xxx) PC2-4200 0MB 2GB 256/512MB 2 2 Intel 915PM/910GML
R51e (1844-xxx) PC2-4200 0MB 2GB 256/512MB 2 2 Intel 915PM/910GML
R52 (1847, 1848, 1849-xxx) PC2-4200 0MB 2GB 256/512MB 2 2 Intel 915PM/910GML
R52 (1858, 1859, 1860, 1861-xxx) PC2-4200 0MB 2GB 256/512MB 2 2 Intel 915PM/910GML
R52 (1958-xxx) PC2-4200 0MB 2GB 256/512MB 2 2 Intel 915PM/910GML
T20 PC-100 0MB 512MB 64/128MB 2 2
T21 PC-100 0MB 512MB 64/128MB 2 2
T22 PC-100 0MB 512MB 128MB 2 2 Intel 440BX
T23 PC-133 0MB 1GB 128MB 2 2 Intel 830MP
T30 2366-xxx PC-2100 0MB 1GB 256MB 2 2
T40 (2373-xxx) PC-2100 0MB 2GB 256MB 2 2 N/A
T40 (2378, 2379-xxx) PC-2100 0MB 2GB 256MB 2 2 N/A
T40p PC-2100 0MB 2GB 512MB 2 2 N/A
T41 PC-2700 0MB 2GB 256/512MB 2 2 N/A
T41p PC-2700 0MB 2GB 512MB 2 2 N/A
T42 PC-2700 0MB 2GB 256/512MB 2 2 N/A
T42p PC-2700 0MB 2GB 256/512MB 2 2 N/A
T43 PC2-4200 0MB 2GB 256/512MB 2 2 N/A
T43p (2668, 2669, 2686, 2687-xxx) PC2-4200 0MB 2GB 256/512MB 2 2 N/A
TransNote PC-100 0MB 320MB 64MB 1 1
X20 PC-100 64MB 320MB 128MB 1 1 N/A
X21 PC-100 64/128MB 320/384MB 128MB 1 1
X22 2662-xxx PC-133 128MB 640MB 256MB 1 1 Intel 830MP
X23 PC-133 128MB 640MB 256MB 1 1
X24 2662-Mxx PC-133 128MB 640MB 256MB 1 1
X30 (2672-xxx) PC-133 0MB 1GB 256MB 2 2
X31 (2672 2673 2884 2885 2890 2891-xxx PC-2700 0MB 2GB 256MB 2 2 Intel 855MP
X32 (2884-xxx) PC-2700 0MB 2GB 256/512MB 2 2 ATI Mobility RADEON
X40 PC-2700 256/512MB 1280MB/1536MB 256/512MB 1 1 N/A
X41 (1864 1865 1866 2525 2526-xxx) PC2-4200 256/512MB 1280MB/1536MB 256/512MB 1 1 AD1981B
X41 (1869 2527 2528-xxx) PC2-4200 256/512MB 1280MB/1536MB 256/512MB 1 1 AD1981B
Speed of RAM: The amount of time RAM takes to put data into its memory or vice versa. Speed is measured from the time an address, and control signals are given, until all information is stored in the device outputs.
Fixed RAM: The amount of system memory that comes built in on the motherboard. This memory cannot be removed or upgraded.
Maximum RAM: The maximum amount of memory a system can support and can be reached by installing the maximum amount of memory supported in each memory socket. Maximizing the amount of memory in your system will allow it to run more powerful programs, run more programs at one time, boot up faster, and overall run more efficiently.
Standard RAM: The amount of system memory that usually ships with by the manufacturer.
Bank: A bank is a collection of memory sockets in a computer which work together as a single unit. A bank cannot be partially filled and must be filled with like modules (same size, speed and type) typically sold in a Kit.
Sockets: A socket is an integrated component built onto the motherboard for the specific purpose of inserting memory modules. These can have different pin-out designs and can number between 2 and 32.
Chipset: The computer processing unit (CPU) is supported by the chipset, a set of microchips which contain several controllers, determining how data travels between components and the processor.
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