well assuming you are asking about the new centrinos coming out on the 17th, there will be no differences in the mhz. they will debut at the same speeds of current dothans. but there are important other changes, they will have 533 fsb instead of 400, have pci-e, support dual channel ddr2-533 instead of single channel ddr333, sata-150 2.0 spec (which should include ncq!)instead of pata-100, hidef azalia audio instead of ac'97, and should have a few other improvments that i cant remember at the moment. also the rumor is that the new chips/chipsets will cost the same as the ones they are replacing. anyway, this should equate to some performance boost but no one knows how much for sure. my guess is that it will result in an average of about a 15% performance boost but some people have disagreed with me. part of the reason i predict this is because the centrino is suposed to be a super efficient, low power, hi battery life platform. currently the dothan draws 21.5 watts and the new ones will draw 27 watts. given what the dothan platform is supposed to be, i can't see intel boosting the power draw by 26% only to boost performance by less than 10%. it's also important to note that the power draw increase is ONLY associated with the higher clocked fsb. that means that intel could have added all of the other features i listed and left the fsb at 400mhz and the power draw would still be 21.5 watts. anyway, we wont know until it debuts but maybe intel is so stupid to decrease battery life so much for a small performance boost.
