Running Windows 7 64bit myself with 6gb of ram. Using Keyclone with 3 clients and maximizer. If I do not swap I have no problems. If I swap with 1 of the other clients I tend to not have any problems (pretty rare.) However once I start swapping with that 3rd client things tend to go downhill and I will lose mouse active window and Keyclone broadcasting. At first it was pretty inconvenient as I would shutdown all clients and keyclone and restart. However I soon realized I could just restart keyclone, manually add the 3 clients and set each maximizers position and be running full speed in about 30 seconds. Not bad (unless I lose that connection in a tough spot )