It is very possible. You'll need to purchase the appropriate hardware that is natively compatible with OS X drivers and then use an EFI bootloader, like EFI-x. It's a small USB drive that plugs directly into the header on your motherboard, and spoofs the OS X installation DVD into thinking it's installing on a genuine Mac.
You are violating the EULA by doing this.
If interested, google EFI-x. Their official website has forums with tons of information from people doing this on a daily basis.
yea its possible, tried it and I wouldn't trust its stability... I guess if you are just trying to get familiar with os x server than its fine, but I would rather put it on any mac using virtual machine.