Hi Voiceafx, I have setup gaming rooms and stations for multiple PC and Console systems. The key to this type of network is processing power of the router and true available bandwidth of the ISP. I have found that modem router combos are not the best choice for multiplayer online intensive games as their components are substandard to keep the cost of the units down. The symptoms you're describing sounds as if the combo unit processor is not fast enough to handle the port routing and NATing required. Inclusion of a standalone router may help your network perform better. At this time most high end consumer routers from Linksys and Asus handle multiple devices simultaneously without issue out of the box. If you go with this method you'll need to get your ISP involved once you're ready to connect the router. They will need to change the network protocol of the modem to accept the router as the new gateway for network devices otherwise you'll be back where you started. Concerning the ISP most providers balance bandwidth at hubs to ensure equal service to all parties. This can at times slow ping rates and constrict bandwidth during high volume. Which in turn will affect game performance. Depending on the game and console, console/game rebooting as long as this does not occur often with any game is a function of both the program and console pulling a network error that enables a data protection module to prevent malicious intrusion into the source material or network manipulation. Hope this helps. Edited for more content.