iXBT Labs has been accumulating information on the new technologies we find in the present CPUs from AMD and Intel.  In this particular article they focus on Hyper Threading, what it means and more importantly what you can expect to see in the way of performance impacts in normal usage.  You can find links to the others in the series of articles on this page, including a portion on memory tweaking.

“As promised, this short article will be devoted to the analysis of probably one of the most interesting technologies used in Intel Core i7 processors — Hyper- Threading.”

Here are some more Processor articles from around the web:

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Processors  Processors