I also think firmware needs to change.  On many alphas the firmware
sets funny things like the number of clock ticks to wait for a cache
line reload, etc.  and these are dependent on clock rate.  If you go to
a cpu faster than the fastest supported one for that box you won't be
able to get appropriate firmware.

Chris G. Demetriou writes:
|> 
|> > I have an Alphastation 200 4/166 and was wondering if the CPU can be swapped out for a faster one like a 4/200 or a 5/xxx?
|> 
|> It can _probably_ be swapped out for a 200MHz EV4 or EV45 (I dunno
|> which came in the 200MHz part 8-) or a 233MHZ EV45.  However, I'm
|> definitely not saying you can do that, etc.; if you attempt it, it's
|> all on your own.  I seem to recall that there are jumpers on the
|> motherboard and possible an oscillator that would have to be replaced
|> if you want to change the CPU speed.
|> 
|> You can't replace it with an EV5 or EV56 (21164 or 21164A), for a
|> variety of reasons: different pinouts, different package size,
|> different bus interface, ...
|> 
|> cgd

-- 
Dave Cherkus ------- UniMaster, Inc. ------ Contract Software Development
Specialties: UNIX Internals/Kernel TCP/IP Alpha Clusters Performance ISDN
Email: cherkus@UniMaster.COM  When the music's over, turn out the lights!