[blockquote] We are comparing three different Intel cores to AMD's one and only Opteron core, so let's focus on the Intel cores first. Intel's Prestonia core is the 0.13-micron heart and soul of the 2-way Xeon processor now. The latest and greatest Prestonia based Xeon runs at 3.2GHz and features a 512KB L2 cache as well as a 2MB on-die L3 cache. This Prestonia should sound very familiar as it is basically a Xeon version of the Pentium 4 Extreme Edition, which was a Pentium 4 version of the Xeon MP at a higher clock speed. Yes, Prestonia is a server version of a desktop version of a server processor. In fact, the only difference between Prestonia and the Pentium 4 Extreme Edition (other than packaging) is that the Prestonia only supports the 533MHz FSB. Front Side Bus bandwidth is actually a very serious issue when it comes to Intel CPUs, but we'll talk about that shortly.
Next we have the Xeon MP processors based off of Intel's 0.13-micron Gallatin core. The Gallatin core is what the Pentium 4 Extreme Edition was derived from, and offers 1MB, 2MB and now 4MB on-die L3 cache configurations. Prior to this article the largest cache size available on a Gallatin core was 2MB, but today Intel is launching their 4MB Gallatin parts. Both the Gallatin 2MB and 4MB parts continue to use a 400MHz FSB, which is the Xeon MP's Achilles' heel. The Gallatin 4MB parts are available in speeds of up to 3.0GHz, which we are including in this review today.
AMD's offerings are much simpler; the Opteron is available in 1-way, 2-way and 4-way+ configurations: the 1xx, 2xx and 8xx series respectively. AMD's offerings haven't changed since our [link=http://www.anandtech.com/IT/showdoc.html?i=1935]web server comparison[/link], although we should see 2.4GHz Opterons debut in the near future. [/blockquote]
[link=http://www.anandtech.com/IT/showdoc.html?i=1982]Anandtech Article[/link]
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