I was searching for extra memory on Ebay and found these one gig modules .

What do the different types mean?

thanks eto

c/p from ebay

1GB Module DDR2 MEMORY FOR IBM ThinkPad T43 Series (Type 1871)

1GB Module DDR2 MEMORY FOR IBM ThinkPad T43 Series (Type 1875)

1GB Module DDR2 MEMORY FOR IBM ThinkPad T43 Series (Type 2668)

1GB Module DDR2 MEMORY FOR IBM ThinkPad T43 Series (Type 2669)

1GB Module DDR2 MEMORY FOR IBM ThinkPad T43 Series (Type 2687)

As far as RAM goes, the type means nothing. All the types use the same RAM. The different type models feature different GPUs, screens, HDDs, etc. Just various configurations, some of which shipped with a variety of RAM values, but all are DDR2 modules.

Here are some of the differences in the T43 "types"

ah so grasshopper is enlightened

so basically they are listing the type of thinkpad T43 that the memory came from correct?

thanks Neil

The T43/R52 needs PC2-4200 or PC2-5300 SDRAM (a.k.a. DDR2-533 or DDR2-667), 200-pin SODIMMs, non-ECC.
Both types will work equally well, albeit that the 5300 modules will clock down to 4200 speed.
The T43/R52 takes a maximum of 2GB RAM (2 x 1GB modules).

thanks realblackstuff