gday newlod. take a look at some settings ive posted in this thread:
http://forum.1cpublishing.eu/showthread.php?t=20870
We have quite similar systems, so hopfully these might help
also refer to the other thread i posted in my 1st post and use that with these settings
let me know how u go. My mate has my old 9800gt and is runnin it good also