Gameserver hardware

Hiya


What hardware would you recomment for those two servers?

Server 1/ 1 gameserver -> 12-16 people MAX.
Server 2/ 2 gameservers, 1 with 10-14 people max, the other 12-16 people
MAX.

My question is about the minimal configuration. I don't need to have a
2,8ghz if I can do it with a 2.0ghz . It's to know what will be possible
with the server in my possession already.
It's a dedicated Linux (maybe FreeBSD in the future) Server, AMD Athlon XP
2000+ with 768 DDR ram, with a 80GB HD at 7200.
I also have an Duron 1300 with 512 DDR ram, for in a small internal LAN,
not connected to the internet, like the other one.

If anyone could tell me about their thoughts about the two servers (Server
1 and Server 2), or even about what I can accomplish with the one I already
possess ...

I have this server, and I'd like to put the gameserver online for friends
of mine ... so they can play all day long

TIA for your tips, thoughts, ...

FD.