You know what? I'll just tell you guys.
The one Nashten linked is an early sample of 6900k. (6900k ES1)
I don't know why the seller thought it is xeon.
It doeesn't even support registered ecc ram. because it's Broadwell-E.
Multiplier is unlocked up to 80x, and support ram overclock as well.
stepping is B0(on cpuz)/L0(on hwinfo64)
QK3P is 6900K ES2. it is M0(on cpuz)/R0(on hwinfo64)
vcore 38x / 1.344v (offset +0.250v)
cache 25x / default
ram 2933/15-17-17-35 2T 1.35v / SA voltage +0.225v / CPU I/O Voltage 1.115v
my build is
X99 Deluxe II
Corsair Vengeance LED 32GB PC24000 (4x8GB)