Yes you can upgrade a 600 series to 400 Mhz. Both sockets MMC-1 aswell as MMC-2 can be found in 400Mhz. MMC-1 has 2 small connectors. MMC-2 has 1 large connector.
600 and 600e have different motherboards. MMC-1 400 Mhz was never used in a factory Thinkpad. But you can use any other brand. Cheers. TPsRok _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
