the only problem is: how do you update the bios if your processor won't work without updating the bios - will it work on one of its cores until the bios is updated or do you have to get hold of a single core cpu to update the bios with????
if you already have a board and are using any socket 939 processor, you will have to update the bios before you install the x2 processor. if you buy a new board it should already have the latest bios version with support for x2 processors.