"System manufacturer: Samsung Electronics system model: P29/28/26" P29/28/26 may not be specific enouugh. Apparently you have a Samsung P28, or P29, or P26 notebook computer. Look on the outside of the Notebook for it's specific model munber, probably on a label on the bottom of it. e.g. NB-P29xxxxx If there is no label, look in your bios Setup for the model number, or try Bios Agent. There is ram listed for Samsung P28 and P29 on the Kingston site - they both list the same ram modules. There is ram listed for Samsung P28 and P29 on the crucial site - they DO NOT list the same modules. Huh?? So it's important to know which model you have. I found no ram listings for P26. ...... You can get a manual, drivers, etc. on the Global Samsung web site. Search for P28 or P29, whichever applies. "I ordered another pair from Maplins but after 3 failed attempts! they sent: 2x 256 8 800 40ns. What i need to know is will these work as a pair with the other 2 to give me 1024MB or do I need to send them back. If I open them they wont take them back." If you can identify who actually made the ram, and can see the manufacturer's ID number on the ram, without opening up the package, you can probably look up whether it will work in your model. If you can't do that, since they don't allow returns, don't take a chance - send them back. There is no way of confirming whether the ram will work for sure on the Maplin's web site that I can find. Places that sell memory as well as other computer pieces are not ram experts in most cases. If they don't have some way of confirming whether the ram you were thinking of buying will work for sure in your computer on their web site, and if you can't look up whether the ram they sell will work elsewhere on memory manufacturer's or distributors web sites that DO have a means of looking up whether the ram will work for sure by using quoted brand and ram module ID strings, shop elsewhere. According to the info on the crucial web site, P28 and P29 have only 2 ram slots. If you want 1gb total ram or more, you need 2 512's, or 2 1gb's, and you take out what ram you already have.

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Oops. "If you can't do that, since they don't allow" opened ram "returns, don't take a chance - send them back." By the way, you must remove the main battery and the AC adapter whenever you remove or install ram.

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"If you want 1gb total ram or more, you need 2 512's, or 2 1gb's, and you take out what ram you already have." Or a 256mb and a 1gb, or a 512mb and a 1gb, etc. Your computer does not need to have matched pairs in a set, and those are not applicable or available.

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