What is Skulltrail?

Increasingly, people are asking, "What is Skulltrail and will it make my head explode?" The answer is, yes it will, hence the name.* That's what happens when you take an Intel® D5400XS motherboard with two CPU sockets, a quad-channel memory interface and four PCI Express slots (each with a full sixteen lanes at its disposal), squeeze in a couple of Intel® Core™2 Extreme QX9775 3.2 Ghz server-class, quad-core CPUs with 12MB of L2 Cache each, add a 400 MHz (1600QDR) FSB to complement the 5400 Northbridge and make sure the BIOS offers a vast range of over-clocking options for speeds of up to a mouth-watering 4 GHz, not forgetting to ensure NVIDIA SLI and ATI Crossfire compatibility. Et voilà.

* The answer given here is not strictly true but what follows is.