So what's the big deal? Customers buying Proliant servers can now buy exactly the same servers but with Opteron inside. Well that is exactly the deal: one of the world's best-selling server lines is now being offered with a choice of Intel Xeon or AMD Opteron processors.
HP executives were eagerly talking about better performance, lower prices and lower power consumption of the Opteron-based servers compared to the Intel ones.
More details at ZDNet