Before you get any RAM, you should be sure you're getting the correct type, speed, and that you even have an extra slot. Some laptops can be tricky, too... Mine, for example, has an empty slot, but it's not usable. Basically, it's for non-removable RAM that wasn't installed by Averatec. In other words, only a single usable slot.
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Desktop * Athlon X2 4200 | 2G RAM | 160G HD | 7600GT
Laptop1 * C2D T5550 | 3G RAM | 120G HD | Intel x3100
Laptop2 * C2D T5250 | 2G RAM | 160G HD | Intel x3100
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