New HP server, need graphics card?

Also I'm trying to do as high of resolution as possible on some cameras. Not sure if that makes a difference or not.
Thanks.
you keep saying that without specifying the resolution
 
Some of our outdoor cameras are currently set to 1600x1200 but can go up to 2592x1944 and if possible I'd like to go to the highest.
 
Honestly what I am really just trying to figure out is which is the best computer I need to have. I completely understand (after being chastised) that we bought an expensive server to handle this.
What I am trying to understand is if we returned this server and bought a desktop workstation, would we get a better performing computer for what we are trying to do than the server we currently have?
I get the server uses more power and we spent a lot of money on that. It's "best performance" that I'm looking for.