The Cb score of 1300 mr Boomstick cant of been at 4.8 GHz or something was running in the background slowing it down.
I get 1330 @ 4.4GHz so something was going on.
I was originally looking at going x79 with 3930k. But the prices they are going for on the bay were just too much in comparison to a brand new 5820k. New x79 boards were the same price ish as x99 boards. 2100 ddr3 seems to be going for about a ton second hand for 16GB.
Weighing it all up, there wasn't a lot in it. Then OCUK had a special on a 5820K and a Asus X99-s for £479 which coincided with 16GB of Corsair lpx 2666 C15 DDR4 for £125 on the MM ( Thanks Mr Boomstick
)
Quite chuffed with how it runs, especially compared to my old i5-760 @ 4GHZ.
A really nice upgrade for ~600 quids.