The Inquirer reports overclocked Kingpin hit 6GHz on a Intel Skultraill system!
Seriously though, this is not an easy thing to do, Skulltrail has two sockets making the overclock orders of magnitude harder than most machines. It doesn't take much more than a chimp to OC one socket nowadays, but two is quite tough for the best of them.
To make matters more interesting, he got the FSBs, both of them, to more than 1700MHz. More than anything, this is a testament to the inherent goodness of the Seaburg chipset, it is driving eight cores at notably higher than it's rated speed.
The only downside? 1.953v, a tad higher than the 'recommended' settings.