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I've always used Crucial and I haven't had any problems with them. I recently bought 2 2GB Crucial for my wife's Macbook for 39.99 on sale after rebate. Fry's was running that special. Awesome deal. She doesn't really need 4GB on her Macbook, but for $40 I couldn't pass it up.
 
thanks for the info but, my question still stands. does it make a difference if its pc2 5400? or 5300?
 
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