Guess that I am lucky, Frame rates range 78 to 128( full graphics), only white screen is when I try to join someone from the hanger screen.  Frame rate jumps a little near the ground but usually around 50-55.  I am guessing that all you  high end game machines are really giving you some trouble, this little dell dem/4700, with a Gforce GS250 vid card is doing very well against the high end machines, or most likely its luck.  Pyro..... the game seems to be working fine, windows XP ... nothing I had to change.. except my darn X52 has to big dead bann that I can not figure out...also I put all USB stuff on external power..."hint  hint", keeps the machine more stable ..don't ask me it just an observation... and also got a 750 watt power supply... maybe this can help ya...  I don't know.. seems to be working fine with new graphics.   Sometimes simple is better... 
Eaglehrt