I'm running an l4d2 dedi on my spare PC. (on home network)
its has:
Windows 7
Core2duo e6750 @ 3.2ghz
4GB RAM
and a standard motherboard.
The connection is Cox and measures at around 25mbps down and 2mbps up. I think we're offered more bandwidth than this, but my modem is fairly old and may be hindering top speeds.
The performance is excellent on regular maps and some custom maps.
however, on most customs, with a full game (8 players and lots of ai), the average pings will increase substantially. Players who usually have 50-60 ping end up with 90, people with ~70-80 go above 100 ping.
What causes this?
I never see my outbound get anywhere remotely near my max upload. Same for download obviously.
The PC never maxes out according to the logs, the server FPS stays locked at 100.
So could this mean that my modem is holding me back? Some of the time my ping also increases (from ~16ms to ~50ms). But most of the time my ping stays ~17ms while other players' pings rise.