Unwichtige Fragen, trotzdem interessant!
But we can say for sure that Xeon X3450 and especially X3440 are more interesting for overclockers than Core i7 860 (they are cheaper, they are easier to overclock, they will demonstrate similar results at the same frequencies) or i5 750 (faster at the same frequency). It's a curious phenomenon, considering that Xeons are designed for servers and workstations. However, as we have already found out, official positioning does not necessarily coincide with useful applications - they may be much wider than the former. So we shouldn't ignore single-socket Xeons, when we choose a home computer - they may be very beneficial.