@fable: Ok, since you have someone else doing the upgrade, he ought to know what to do, so I don't need to say a thing, though I can suggest a manufacturer. I'm using a single 512MB stick from ULTRA (comes with heat spreader attached), and I get awsome performance for a single stick.
@Mandrake: Surprised me too when I first found out. My P4 HT has a full 1MB built on and Windows was using none of it. But I can understand why that's default. Think of the problems a box can have if it's making calls for cache that doesn't exist. The least Micro$haft could do is give the option somewhere to change it other than having to dig through the registry.
