By the sounds of it's everything should be fine, it's a x86 arch, which is the same as most desktops.
Allow me to explain a little as well, nice-ness is a a *nix concept of importance, something that is "nice" will have a positive value, and is least important, this is handy for any task that does not need to be done in a hurry, and should only really run when the services are available, an "un-nice" process, aka one with a negative value, will steal processing time from other tasks, even if the other task is interactive(like say, apache) meaning that these processes will most likely not run slowly should an intensive process be run, you should be careful though, an intensive task with a negative niceness can cripple the system until the task is completed, since it steals processing time from other tasks.
From a normal SSH login you should be able to run
nice -19 sh
To launch a child sh process with a nice value of -19, which is about as low as you can go.