You haven't mentioned what OS you're using. That could make a difference on how much RAM you might need or be able to use.

On the 2GB sticks: It's probably a stability issue on that particular computer when using the larger capacity RAM modules. Whatever the case, the people that built it have tested it and that's why they recommended what they did.

You could add a 2GB stick and it might work OK, or it might not. If it does work the faster 1GB stick will be limited to run at the slower RAM's speed.

If you're running Win Xp I'd just add another 1GB of the faster stuff and be done with it. XP will run with 1GB but works better with two. That's plenty for XP in about all but the most extreme situations.

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