Intel Woodcrest, AMD's Opteron and Sun's UltraSparc T1: Server CPU Shoot-out

Introduction

In Q1 of 2006, AMD-based systems accounted for over $1 billion, or one sixth of the x86 server space. The Opteron grew from a 6% market share to 15% market share in the astonishingly short period of only one year. In four socket servers, the Opteron grabbed 48% of the US market, up from 23% last year. What's more, this is not a "US only" phenomenon: the Opteron has a firm grip on 36% of the worldwide four socket market. Bear in mind that less than 4 years ago, AMD was nothing more than a blip on the server CPU radar.

Sun, which was getting strangled by the high volume Intel Xeon and the mighty Itanium, has also made a big comeback. An attractive UltraSparc IV+ with a fast, integrated L2 cache and massive L3 cache keeps the traditional Sparc buyers loyal, while the well-designed Galaxy Opteron based servers are pretty popular and the UltraSparc T1 "throughput CPU" attacks the midrange x86 market.

It's high time for Intel to find a proper response, as the competition is taking the wind out of Intel's server CPU sails. What's the answer? A Xeon based on the Core architecture: Woodcrest. We compared the Core and K8 architectures just a month ago. Memory disambiguation, large OOO buffers and a large but low latency shared L2 cache should make the Core architecture more efficient in server related tasks than any other x86 CPU.

This article compares a Woodcrest based Intel server with its closest rivals: AMD Opteron based servers such as the HP DL385 and MSI K2-102A2M and the UltraSparc T1 based Sun T2000 server.