Im sorry if this question has been asked before but since I just joined, what the hell. Anyways, my question is, When a retailer or anyone for that matter is talking about the processor and puts for example 2.4A Ghz or 2.4B Ghz, what do the A and/or B mean? I have seen regular 2.4GHZ computers and then i see like 2.4A and 2.4B, whas the difference?