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11-16-2009 02:45 PM
2. Can I upgrade the memory in my laptop?
Yes, but only within the limitations of your notebook's motherboard chipset and
HP custom Notebook BIOS does not allow modification of the primary and secondary
memory timings or memory module voltage setting. That puts a severe limit on
which particular memory modules will operate in your laptop. Go to a major
memory manufacturer website and use their utility (PNY memory configurator,
is guaranteed to work in your laptop.
If your desire is for the upgrade to work on the first start after you install
the new memory modules,there are a few rules of thumb you should follow.
1 ) The bus speed of the new modules should be the highest speed that the
specifications of your notebook state. Do not mix modules of different bus
speeds. Mixing bus speeds results in defaulting to lowest speed and a possibly
non operational memory module configuration.
2 ) Don't mix memory modules from different manufacturers. The module memory
chips, timings and voltage requirements must be identical.
3 ) The memory modules must be configured the same. (either single sided or double sided)
4 ) The memory modules must be the same size (256 MB / 512 MB /1 GB or 2 GB) 2
and 4GB modules will not operate in all laptops. Check HP's stated maximum
memory in the specifications for your product in the HP laptop specific support
There are exceptions for this rule of thumb. Laptops with AMD chip sets are sold
with different size modules installed. ( 1 x 1GB and one 2GB memory stick)
5 ) On some older laptops it will be required that you go in to the BIOS on
start up (normally it is the F10 key) and set the amount of newly installed
memory to the new actual value. Newer laptops will generally auto configure the
It is highly recommended that you purchase memory only from a major memory maker
(HP,Kingston,Crucial,Corsair...etc) that is guaranteed by them to work in your laptop.
Generic no-name brands probably will not work.
Erico wrote this very informative piece, its in the "Notebook (Laptop) Upgrade FAQ" thread at the top of "Hardware" section. It also has helpful hints on upgrading every piece of hardware in a laptop. I suggest taking a glance at it and gain some knowledge from a very knowledgable person!