Intel has released <A HREF="http://news.zdnet.com/2100-9584_22-5645798.html?tag=nl.e589">a new generation of Xeon chips,</A> its first high-end models to include 64-bit features designed to easily accommodate large amounts of memory. The new Xeon MP models, designed for machines with four processors, include the 64-bit extensions that Intel previously sold only in Xeon DP models for dual-processor servers. There are two new Xeon MP varieties: the less expensive "Cranford" model with 1MB of high-speed cache memory and the more powerful "Potomac" model with either 4MB or 8MB of cache. Intel unveiled the processors at an event with top server executives from x86 server market leader Hewlett-Packard and rivals Dell, IBM and Unisys.