So if i am correct. You want a 6 core Xeon in that motherboard but it dosent support Xeon or am i wrong?
You cut them try to find a I7 6 core chip. One of these chips: I7 970/980 non X/980X/990X.
Found a I7 980X on ebay that arrent to exspecisive:
http://www.ebay.com/itm/Intel-Core-...893102?hash=item2a79ab41ee:g:XEYAAOSwA3dYhBtk
i just found last week a X58 bundle with an I7 980X to 208 USD complete with memory, cpu cooler and mobo. And i am now if all goes well to sell of my own old X58 bundle with a I7 920 for about 130 USD. So i only paid like 70 USD for that I7 980X cpu and in the same way got a better mobo and CPU cooler.
By the way you say you are running your current I7 920 @ 3.7 GHz with stock cooler and hitting 93C on the hottes core. Just a friendly warning: with those temp you are slowly but for sure giving it a slow and painful deafh. Those temp are way to high for safe run. It pains me to see such a great cpu suffer so please get a better cooler. If you replace the cooler with a good one in return your I7 920 can clock well above 4 GHz (my own I7 920 before i replaced it where good for 4.4 GHz but keept it for daily use at 4.2 GHz to keep it at safe heat an voltage levels.
That I7 980X i have now running at 4.3 GHz for daily use but is good for 4.5 GHz if i need it.
Se these screenshots if you are curious. Note both CPU`s are air cooled at these overclock but that I7 920 where running a bit to hot for daily use at 4.4 GHz. Also note the difference in voltage needed. I7 920 at 4.4 GHz needs 1.45 vcore where I7 980X only needs 1.4 Vcore to do 4.5 GHz and by that can be use 4.5 GHz for every day use if needed:
Hope this can give a helping hand to your Xeon troubles.
These are the settings i used for my I7 920 to hit 4 GHz. Later after these image where taken i got the chip to 4.4 GHz but i dont have image of those settings.