HP, Intel End Itanium Chip Pact  SAN FRANCISCO (Reuters) - Hewlett-Packard Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=HPQ.N target=/stocks/quickinfo/fullquote"&gt;HPQ.N&lt;/A&gt; and  Intel Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=INTC.O target=/stocks/quickinfo/fullquote"&gt;INTC.O&lt;/A&gt; on Wednesday ended their 10-year  partnership to co-develop the Itanium chip for server  computers, following disappointing sales of the product.