So, I won a xeon processor in a contest (weird right?) and i know they are mainly used for servers, but can i use it as the processor of a normal pc? what are the advantages/disadvantages? The main problem is that i don't know if there are any xeon MOBOS with pcie lanes...
On a side note, how does a xeon compare to normal cpu's in, for example, gaming?
You'll need to say what socket Xeon it is, i.e. 1155, 1156, 1366, 2011. All motherboards with these sockets have PCI-E lanes.
Also, since Xeons are mainly used in server environments, as you noted, they're optimised for multithreaded workload by having lots of cores. Games don't use more than four at most, but Xeons are very respectable processors still.
The Intel® Xeon® processors share a common microarchitecture with our desktop processors. Now some features will be turned on and other off (like ECC memory on the Intel Xeon® processors). So you shouldn't have any problems running anything on these processors.