My take on it:
Number one, who the FUCK needs 6Ghz?
2, I doubt your going to use all that power...the juice isnt worth the squeeze.
3, AMDs dont need high speed clocks, they have shorter pipelines
4, For gaming...CPUs arent much of a factor anymore. I have an AMD Athlon 1.2 Ghz CPU but a PNY GF 5200 ultra fx and i can crank 70-80 fps on full settings at 1280 x 1024.
5, Its overclocked...i never trust anything that voids my warrenty
6, Dual Xeons were made for the same thing
