>Not a big AMD guy here, but I just recommended an AMD Sempron 3300+ (pretty much because of a sale I saw) for my brother. He will be doing gaming on with it.
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>Are Semprons an equivalent to a Intel Celeron processor (more value, less performance)?

More or less ... See http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_11600_11613,00.html and http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_11599_11604,00.html