(09-01-2013, 06:21 PM)JMC47 Wrote: Actually, this is sounding like a bandwidth issue; 1789 has half the inputs of newer builds meaning that your speed increase is likely from that. I'm thinking one of you are having bandwidth throttled something horrible.Ok so the both of of tried netplaying with other people we both opened our networks to the port that Dolphin uses so our network doesn't block it. However, embarressing to say, performance was even more substantially lower. We were able to figure out though that it was them slowing the game down. Their cpu's weren't able to handle Dolphin by itself in Single Core mode (they could play fine in duel-core but we already know that causes desyncs). We don't know of many other people who have good enough pc's to be able to run Super Smash Bros Melee in Single core mode.
Try playing with someone else, have your friend play with someone else. Single core should work for you; this is all on networking from what I've seen. Firewalls HAVE caused this in the past in some strange cases, may want to try disabling firewalls on all computers temporarily. Your computers are fast enough, but somewhere, the networking is derping, and I don't think it's dolphin's end.
This may be an odd question but do you know of anyone who can test netplay with us for now so we can find out the problem?