whats the different between a server motherboard and a normal motherboard?

A server motherboard usually has more than one CPU socket. It usually has more DIMM slots than a desktop motherboard. It usually supports ECC (may even require ECC) RAM. It will usually have multiple network interfaces. It may have a dedicated network interface for management. It might have different power connectors than a standard desktop motherboard.

Will you be able to use it? Without more specifics of what it is and what other things you have there is no way to answer that.
 
Will you be able to use it? Quite possibly. Should you use it? No. For a desktop a desktop motherboard is almost certainly a better choice. It will work with standard components, it will fit your case, it will have more features, it will probably be cheaper, and it may well have better performance.
 


IF (BIG IF) the software you are running on it can take advantage of the extra CPU resources. A highly threaded application like a database server could benefit from the additional CPU resources. Firefox web browser wont.

Usually the clock speed on server CPUs is lower than desktop CPUs. Server CPUs have more cores than desktop CPUs from the same time, but probably have lower clock speeds. Server CPUs are built to run 24/7 and be 100% reliable. They sacrifice a little speed for the additional reliability features that server CPUs have.