text: AMD Big Gainer in 3rd-Quarter Microchip Sales-IDC  SAN FRANCISCO (Reuters) - Advanced Micro Devices Inc.  &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=AMD.N qtype=sym infotype=info qcat=news"&gt;AMD.N&lt;/A&gt; captured nearly 10 percent of computer microchip market  revenue in the third quarter, the highest level in nearly three  years, market research firm IDC said on Tuesday.