It was 2-MHz.  Here is a site about the 8800
http://www.machine-room.org/computers/289/
Dan
  Hello, all:
        This might sound like a "you should know this" kind of  
question,
but
  what was the default CPU speed for the Altair
8800/8800a/8800b  
models? Is it
  1MHz or 2MHz?
 Rich
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