During a time consuming process I/we figured out that the KillerNetworkService.exe finally is main source of the problem - disabled I've full upload performance, enabled (after every restart automatically) I only get max. Since a few weeks (last network-update I took in Feb 23) I got pretty slow upload speed and got in contact with my DSL-Provider here in Germany. Hi MidwestSteve, I've got the same problem on the same Dell XPS with my Killer E2400.
