Running a Server and Playing on The Same Computer

[Spartanfrog]

There are other problems besides hardware. Sure, today's hardware COULD allow a user to play and host on the same computer, however the server would lack the benefit of optimization which is available to dedicated machines. Another problem for a hosting and playing, is keeping the server online 24/7. You do not have to by any means; you might want to just host a server for an hour for a couple friends.

I do not think we are arguing the same concept here. You are arguing that it possible and I whole heartedly agree. It is plausible to run and play a server on the same time. Is it a good option for most users? Nope, here's why:

Home networks are not designed for optimal latency
Throttled Connections
Lack of optimization
Most likely, server not up 24/7

Sure you could take away the first two saying that it is a separate item. Then take away optimization as you could say it is not especially important. Also even take away the 24/7 if you would like. But then what are you left with? A server with high ping, a server with already decreased performance (No matter what your hardware, it would still decline while playing and hosting), and one that's not even always on! Would you want a server like that? There comes a point where it just is not worth it. It could be perfect for a group of buddies to screw around on but for people wanting to start a clan or etc, it's not a viable option.

Now as for what hardware would be required to host, I just generally use a Pentium 4 3.0 ghz as a generic unit. Squeezing in, you could probably get 60 100 tickrate servers MAX. Leave a little room for mods and etc, I would say maybe 45 100 tickrate slots in use without lag. Then use cpubenchmark.net to look up comparable reports to your processor.

To sum it up, yes it is definitely possible. Is it practical? Not for most users.