eVGA Dual S1366 Board To Work With 2xCore i7, No Xeon DP CPUs Required?
 

However, one of our sources informed us today that it’s possible to make a pair of LGA-1366 Core i7 processors work together, but it requires a few things. First of all you need to use the Intel 5500 chipset rather than the X58 chipset. A few modifications also need to be done to the reference board design and a special BIOS is also needed.

We also found out that EVGA isn’t the first company to make a motherboard that will work with two Core i7 processors, but we can’t divulge who the other company is at the moment. However, the board in question is a workstation board and its not targeting the consumer market, as it’s based on the CEB form factor. A CEB board is only slightly bigger than an ATX board at 12 by 10.5 inches compared to 12 by 9.6 inches for a standard ATX board. This means that you can have most of the functionality of the EVGA board on a much smaller PCB.

http://www.semiaccurate.com/2010/01/...dual-cpu-mode/