You would need a Quad Core for that. Something like the Q6600, or equivalent.
For that setup, you could probably get away with 2GB ram but to be safe 4GB would be good, especially if you don't plan on restarting that TF2 server daily.
Any size hard drive, as long as it is 7,200RPM or more. Server files are 1 - 3GB depending on the game.
For that setup, you could probably get away with 2GB ram but to be safe 4GB would be good, especially if you don't plan on restarting that TF2 server daily.
Any size hard drive, as long as it is 7,200RPM or more. Server files are 1 - 3GB depending on the game.