Basically just the CPU fan, case, and PSU (if you're lucky). If someone can figure out how to get Doom running on just those 3 things, young people will be able to ascend.
Free in that you paid a $120 premium to get a $10 part every 5 years with an upgrade.
They make good stuff, but it just isn't worth the markup. If actually you need the level of performance to justify spending that kind of money, just go with liquid cooling.