In theory - yes, in practice you will probably find you have issues using the multi CPU's. I would suspect the program will only use one of the several CPU's as opposed to using multiple cores in a single processor.
If you are trying to run the single installation from the server to multiple workstations, then it is very unlikely this will work and if it did you are breaking the terms and conditions of the EULA.
I would not recommend using a server version of Windows for running applications which are not designed for it.
Raw CPU power / numbers is not the only determining factor in achieving high render speeds, you have to consider all the other bottlenecks you are likely to encounter eg hard drive read/wite speeds, bus speeds, and in particular graphics card architecture.
High end gaming graphics cards are not necessarily suitable for 'on GPU' rendering and putting the data back to the processor - they are generally designed for a very fast one way data flow ie RAM --> GPU --> monitor output(s).