I have a friend with a Dell Inspiron B130 laptop that's badly in need of a memory swap (he went cheap and ordered the *censored* thing with minimum memory). Needless to say he now regrets his stupidity... My question is simple: I have a pair of 512MB, 200 pin DDR SO-DIMM chipsets in my PC catch-all drawer and need to find out if they're compatible. Some information I've run across tells me that a DDR2 CHIP can't be used in a DDR socket but can it work versa-visa? Logic tells me yes but I would appreciate some feedback. I seem to remember using these chipsets in my Dell E1705 before I went up to 2 GB but I figured it might be the smart thing to do to check it out first. Any information would be helpful. Thanx! It's as easy as searching dell for the SPECS on the laptop

http://accessories.us.dell.com/sna/category.aspx?c=us&l=en&s=dhs&cs=19&category_id=4325&mfgpid=193364&chassisid=-1

I would SUGGEST 4 gig at $112 for the best results, its the best investment you can make for an upgrade for that laptop.Tell you friend to FOLLOW the below link with hi laptop and let the scanner run. It wil ltell him exactly what kind of ram he can use.

It is likely to reccommend that he use crucial memory but he doesn't have to. The main thing you are looking for is the siz, type, and capacity of memory that can be used on the laptop and this scan will give you that info.

http://www.crucial.com/systemscanner/DDR and DDR2 memory are incompatible.
Buying RAM from the manufacturer usually works out very expensive, I would recommend using the Crucial scanner mroilfield linked to and buying the memory it shows as compatible from somewhere like newegg.com - that way you get memory that will definitely work, at a better price. the brand also isn't important unless you're mixing memory from different manufacturers, in which case it would be better to use all the same brand.
Hope this helps, and welcome to the forums.The manuf. have gotten more aggressive in their pricing lately...aren't BAD economic times wonderful ? ?
The last RAM i purchased was from OCZ and it was as cheap/cheaper than the big box stores about 60 miles away...Thanks to all for your help. I'd hate to do something that doesn't have an "Undo" button... Again, Thanx!