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The following info was about to be posted...then I thought ...maybe??? http://195.100.109.161/scripts/corporate/upg3.asp It appears these folks have spend the money to do the Glue chip design and debugging. Pretty impressive...the work that is ,Not the result . $600 ???Ouch !! Quoting Landmark's "Speed"is very sad and meaningless. Visit Gainberry Web page for a much more "real" benchmark . I think the numbers were 20% better ?? Site is down again or I'd post it. Original Post ;-} Note the error.....(grin) Sigh...NO IT CAN NOT BE UPGRADED !! The 755's, even the 750CE, the 360's can be upgraded. These all use a 486 SX or DX for which an upgrade path exists. Mind you it's ugly ;-} The original 750's use the ill fated 486SL which is the same as a 486DX BUT: The pinout is not the same...at all. The 486 SL includes memory controller, a complete ISA Bus and a few other widgets..... While it is feasible to set up a AMD 486-133 with a LOT of glue logic (gate arrays ) and try to make it all work ; I can't see anyone bothering. The actuall performance improvement isn't fantastic. BTW you can buy a brand new Toshiba 400 Pent-75, color dual scan etc for $900 this is with 3 year warrany from Insight. Or $1250 gets you a new Thinkpad 365XD pent-120, Cdrom ,Active display etc... So why spend $400+ on an out of warrany TP that will STILL be much slower than anything with a pentium inside. ..peter.. who loves his TP 360CE ,TP730T (very strange beast) and will soon have a TP750Pen ---------- From: User754527@aol.com[SMTP:User754527@aol.com] Sent: Tuesday, May 20, 1997 9:00 AM To: thinkpad@cs.utk.edu Subject: Re: CPU Upgrades for TP 750 The TP 750 cpu can be upgraded to an AMD 133mhz. I saw this on Corporate Upgrades web page. Gayle