Now that it's up and running, I've been doing some tests to see that everything is set up properly. Primarily the CPU cooler.
Idle and low load operation: ?5K+, in this case 29?C;
Torture test: ?21K+, in this case 50?C;
Compared to the old computer, which ran at around ?20K+ at idle and up to ?70K+ under load, this is a massive fuck yeah!