I just thought i'd share my recent upgrade info. Until recently i was running an i7 920 @ 2.8ghz, GT8800 and 6gb DDR3 ram. With 5 clients I had massive issues with FPS in dalaran and whilst flying on some routes (through Zul'drak mostly) to the order of about 1-4 fps. Basically hell. I did notice through Coretemp64 which I always have running, that in Dalaran i was using 5.9 of my 6gb ram which meant quite clearly I was memory bound. So ordering another 6GB DDR3 and a GTX285 I now sit at about 25fps in dalaran and no longer have flight issues, using around 7.5gb in Dal. When instancing its common to sit around the 5/6gb mark previously and 6/12gb now. So its important to realise that more ram = better.

my graphic settings are all still quite low, so the GTX 285 would not have had that great an effect imo.. but yes i did install both upgrades simultaneously :P