It's nothing to do with contention really. If you have the eight or ten 1Mb users maxing out their upstreams it satutares the upstream channel which is less than 2000kb after you have taken DOCSIS overheads into account. Once that point is reached it starts to affect the downstream as everything being downloaded has to have data passing on the upstream and that is already saturated. You could have a situation where the uploaders who are maxing out the upstream channel are not downloading (leaving their p2p software running for others to download from them) and only a few other users are on that card and trying to download but find their downloads seriously restricted. Robin Walkers post is worth reading at
http://www.nthellworld.com/forum/sho...2&postcount=15