I have to agree with CraigL. When 64-bit architechure came out, it was all the rage but for whatever reason, not many people adopted it and there is very little application software available that utilizes 64-bit. In fact, 32bit software tends to even run slower on them! My guess it`s due to the fact that dual/quad core processors have recently been released for desktops at a relatively low price that is really fast!
As for your server, a dual or quad CPU configuration is preferred. This would allow for more processing power and the ability to handle more load. This is beneficial especially if you are running database driven websites and are hit with a lot of traffic. You can also host many websites on one server without decreasing the performance.
Of course there is a certain point where the traffic is too much for one server to handle and you have to think about distributing the load to a 2nd, 3rd, etc server and other load balancing techiques....but that is probably a good thing :)
Brandon Eng, Owner, Lead Studios
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