I was thinking around 1980 or 1985, back before IBM PC and clones became popular. Turns out I was wrong, Intel was about 2x to 4x larger than AMD in those days.<p>I went back and got some hard figures. I had to average yearly high&#x2F;low stock price to compute historical market cap. All values in $millions:<p><pre><code>                 1980     1985    1990    ttm &#x2F; yesterday
                 ----     ----    ----    ----
   AMD sales      309      576    1059    3990 
       mkt cap    446     1672     617    3170

   INTC sales     855     1365    3921   55360
        mkt cap  1667     3091    7990  149260
</code></pre>
In 1985 Intel sales are 2.37x AMD and market cap is 1.85x.<p>Currently Intel sales are 13.8x AMD and market cap is 47x.