
In this guide I explain how to remove and upgrade memory modules in HP Compaq nc8430, nw8440 and nx8420 notebooks. In my example I’m upgrading a Compaq nc8430 notebook. Most likely you can use this guide for some other Compaq notebooks. If it works for you, please mention the notebook model in comments after the post.
My notebook came with 1 GB (two 512MB modules). After reading the service manual, I found that this model can take up to 4GB total. You can install up to 2GB memory module into each slot. 4GB memory upgrade kits (2×2GB) are available here. HP recommends using PC-4200 DDR2-533 SODIMM memory modules.
If you cannot find PC-4200 DDR2-533 memory, you can use PC-5300 DDR2-677 or PC-6400 DDR2-800 modules. They should work fine.
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