Apple has made key changes to the Mac mini device line since launch.
From mid 2010 until late 2014, as noted on the Mac mini Wikipedia page, Apple offered two distinct models of the computer with varying architecture. A base model with dual-core Intel Core i5 CPU was available along with a quad-core Intel Core i7 model.
The quad-core i7 model was also available in a server variant with redundant disk drives and either the Server version of OS X (up until OS X 10.7) or a copy of the macOS1 Server application in versions 10.8 and newer. macOS Server can be purchased from the App Store.
With the Mac mini update in late 2014, Apple removed the server model from the product offering. We still offer the quad-core i7 Mac mini for rental with redundant hard drives or with an SSD. For CPU-intensive tasks, the i7 Mac mini is the best value. You are free to colocate any model of Mac mini at MacStadium. See related articles for more details about colocation.
1. macOS may be interchangeable with OS X, the name used for previous versions of Apple's Mac operating system. ↩