[email protected] wrote on 18 March 2009 12:25 EST: > I have a 600e (233 MHz) and 600X (500 MHz)
Are you sure you have a 600E, and not a plain old 600? I don't have the specs handy, but I thought the 600E's went from 300MHz on up and the 233MHz machines were plain vanilla 600's. It matters because there is a difference between the cards that the CPU is on. I think that the 233MHz models use MMC-1 CPUs which are not compatible with the MMC-2 modules used by the 600X machines and by the PIII 500MHz modules. As Bruce suggests, if you have a 233 and are using an MMC-1 module, then your maximum CPU upgrade is a PII 400MHz, and that indeed should be a straight swap. > Can I take out the 233 MHz and so upgrade the 600e to 500 MHz? > > Is that a straight swap of the MMC or what have I to do? If both of your 600's are using MMC-2 modules, then it is possible, but it is not at all a "straight swap". In fact, I would not call this a standard upgrade, but rather a hardware mod, that results in some quirks and that should not be attempted except by those who want to fiddle or who know what they are doing. Having said that, there are lots of people running their 600E's with PIII's at 500, 650, even 850MHz, and who are therefore using an FSB of 100MHz with the onboard memory either disabled or overclocked. Tons and tons of information on this is available on Wims BIOS forum here, if you can figure out how to wade through it all: http://www.wimsbios.com/phpBB2/topic4046.html A shorter set of info is available on the Thinkpads.com Forum here: http://forum.thinkpads.com/viewtopic.php?f=6&t=4118 Phil. _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
