Well, multiple cores COULD run multiple servers. A computer with 8 cores could run eight servers. Eep.
I remember 2 Official servers. Hard to imagine that you were able to run two servers at a time and now are hardly able to handle one. Unless of course you swapped boxes.
I don't understand why you guys want to switch so bad from the xeons. I just think the people you host with or hosted with don't have you set up right. Restart every week.... thats not a xeon machine. I don't think I would ever use windows for a server unless the software required it. The Official was on a windows box right. I look at the numbers and I don't see why everybody is after the AMD. Does it really run it that much faster. Please tell me why and real reasons... not just that intel sucks or amd kicks ass. Still I think your provider is just not up to par.