8800 gts FPS for lost planet

i only manage to get average of 46 fps in snow and 42 fps in cave(if not mistaken, anyway, it's not more than 48fps in both cave or snow) in the default setting. Are you guy getting the almost same result with mine? Is this score normal?

my spec:
8800gts 320 mb
c2d e6600
total of 2gb ram pc667
17" lcd

thanks.

edited: it's base on Dx10 in windows vista, i forgot to say it.
and if i max all the setting i only get like 10+ fps(not more than 17fps).

i see..thanks. oh ya it's under performance test, not when playing..i forgot the fps when playing cos i del the demo already lol...