If you’re not currently following Joe’s blog over at definethecloud.wordpress.com, you should start.
He just posted another great article on why UCS is his server platform of choice. Before you write him off as just another Cisco fan-boy, definitely take a look at his logic. Even if you have another vendor preference, he presents some excellent points to consider.
Take a look : http://definethecloud.wordpress.com/2010/05/23/why-cisco-ucs-is-my-a-game-server-architecture/