Later today Intel will announce that the company already passed the magical number of 1 million shipped quad core server chips. This is one impressive number when you take into account that AMD has shipped zero such processors in the same year.
The situation is going to change, as AMD is about to introduce its K10 quad core Barcelona, but Intel has an impressive lead and has already launched two versions of the Quad core server chips with a third, based on Harpertown and Yorkfield 45 nanometre is scheduled for Q4 2007 and Q1 2008.
Dual core servers are still way more popular, we would know as we have one. Quad core is definitely a better choice, but comes with a hefty price.