I wanna say an Asus P6T would support them. You'll find more information if you check on other 2P server chip compatibility. Some 2P LGA1366 boards support a regular Core i7 (but you can only run a single processor; you need 2 Xeon 5000's for 2P mode) and some 1P LGA1366 boards support a 2P Xeon.

And dude, necroing much?