How did someone overclock a dual Xeon cpu system?!

[Toxikaraidur]

Ok, so I was browsing ASUS's ROG site and got bored and looked at world record overclocking. I came across this image (five clicks after clicking "world records") and about crapped myself

https://d1ebmxcfh8bf9c.cloudfront.net/u97433/image_id_1596679.png

how in the living flabberdabber did this son of a gun overclock not one, but TWO xeon's that have their multipliers locked!?

I have zero overclocking experience, but I do know that xeons with a 2 in front of their numberings (2689 v3 etc etc) have their multipliers locked. Someone please explain this seemingly spiritual phenomenon before the insanity sets in?

 

[madmatt30]

They're barely overclocked , he's upped the fsb by 5 which gives around 180mhz over stock turbo speeds.

Those chips can only run 2 threads at that speed not 16.