If it's an Acer Aspire 3690 Laptop, you would need PC2-5300 memory, even though you could also use PC2-4200 memory. But stick with the faster memory.
The max memory you can use is 2 Gig. You only have two slots so there is not a great deal you can do. I would just put a 1 gig chip in there. That would be more than enough. Now if you already have a PC2-4200 chip in there, getting the 5300 memory isn't going to do you any good. It will default to 4200 speed.
Here is a 1 gig 4200 module from Crucial for $42.99
Here is a 1 gig 5300 module from Crucial for $43.99
If it's an Acer Aspire 3690 Laptop, you would need PC2-5300 memory, even though you could also use PC2-4200 memory. But stick with the faster memory.
The max memory you can use is 2 Gig. You only have two slots so there is not a great deal you can do. I would just put a 1 gig chip in there. That would be more than enough. Now if you already have a PC2-4200 chip in there, getting the 5300 memory isn't going to do you any good. It will default to 4200 speed.
Here is a 1 gig 4200 module from Crucial for $42.99
Here is a 1 gig 5300 module from Crucial for $43.99
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