Pretty sure you guys already know about r_3dsky, r_shadows and rest of these cmds which are usefull, but you may not know, you can change your game to work in 64 bit mode, here is my simple benchmark made on spawn with 39 and 41 players on 32 and 64 bits
How do you enable 64 bit version?
I can't say "It WILL" help, but it MAY help you with fps, it helps me, so there's possiblity it will also help you, just test it out and describe your experience.

How do you enable 64 bit version?

I can't say "It WILL" help, but it MAY help you with fps, it helps me, so there's possiblity it will also help you, just test it out and describe your experience.