Pascal Schmidt wrote in a message to Roy J. Tellason:

 PS> Hi Roy! :-)

 RJT> There's something different about the 133?  That's what I'm running 
 RJT> in this box I'm typing on now.  AMD part,  they call it a 
 RJT> "5x86/133",  although I believe it has some other
markings on it as 
 RJT> well,  P75 or somesuch.

 PS> The AMD 5x86/133 uses a different CPU core than AMD's other 486
 PS> chips. The "P75" is meant to indicate that the application
 PS> performance of the chip is roughly equivalent to a Pentium running
 PS> at 75 MHz.

That's what I thought.

 RJT> I can't imagine it'd be easy to make *anything* that runs at those 
 RJT> speeds!  This is RF,  and fairly high frequency RF at that!

 PS> Yep, puts a lot of additional burden on chip design because at such
 PS> speeds, you have to be careful that stuff like the different bits
 PS> on a memory bus interface have very similar ways to travel,
 PS> otherwise you're going to have all kinds of interference and
 PS> different bits arriving at different times. 

We've been headed toward that for quite some time now,  I think.

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