The Intel Xeon E5462, developed under the codename Harpertown, is a server processor that is a quad-core model, resulting in a high multi-tasking potential. This Xeon 5000 series CPU operates at a stock clock speed of 2.80 GHz and a FSB of 1600 MHz.
Xeon processors are usually made from the best silicon, so you can typically achieve higher overclocks with them. LGA771 Xeon processors are very affordable and blow most consumer level LGA775 cpu's out of the water! You also must remember that these CPU's were meant for servers, which means they are binned higher than the consumer level or even the extreme edition LGA775 CPU's. This usually equates to better overclocks and lower operating temperatures. You can see a list of tested motherboards in http://www.delidded.com/lga-771-to-775-adapter/3/
The CPU is already adapted and prepared to be inserted directly in the motherboard without any special modding!