[Rob]

Whatever you have using your bandwidth has to have an impact on whatever you are doing. P2P software will be a killer. In terms of affecting pings, which are vital for gaming, consider not only the upload and download bandwidth, but also the number of connections being maintained by the P2P software. Simply put each of those connections which includes attempted connections that fail both in and out, will have a big overhead, not only on your internet, but also your router and computer networking capacity.