nt256s64vh8a0gm-75b is the part number you can look it up unless you want me to i think is for a little older laptop like ones came with windows xp-pro could be wrong if you send your model number on laptop il look it up make sure it will work or if my other ones will
give me the model of your laptop and il look it up see if this one will work or the other memory will work or have you looked at your memory and have a number and tell me where the split is in the contacts near the end or in the middle