Run Cheap Xeon socket 771 CPUs in a Core 2 socket 775 Motherboard.
If you’re looking to extend the life of your LGA 775 system, this mod will let you install cheap Intel Xeon processors (LGA 771) into an Intel Core 2 Quad motherboard (LGA 775). These Xeons cost a lot less and are basically identical internally to the high-end Core 2 Quad CPUs (and some of them are even faster).
Please check motherboard compatibility before placing order. More details here :