Maybe problem with my video card!!!

hi.. i want to ask somethink.. first my computer constitute....
asus extream II nforce 790i ultra sli
intel core 2 quad q9770 3.2ghz
ocx ram 4*1GB 1600hmz ddr3
2 *wersten digital raptor 150GB*2 (raid 0)
2 * xfx geforce 9800 gtx 512mb in 2-way sli
also iam using water cooling for my cpu my motherboard chipset and for hard drives

My quastion is.. iam trying to play crysis... I was setting resolution at
1600*1050 with AA*16 and gamer step
(it's one step before high graphics).. So my fps. is 45-50... is this bad??

I check on internet... some pepole takes 70-120... and they have only 1 video card... can you tell me something in order to fixed it???

thank you for your help....

You have right human eye can't detect fps.....crysis works perfect, also if , i set high graphic level... but at 1152*856 resolution.... is one of the best games that I have playing but the same time the most boring for the computer...... there are many fake people....

if you have suitable system 2 9800gtx they collaborate irreproachably....that interests all of us is the drivers of cards.... you cannot... present new models of cards and don't support new drives.... i haven't check it but i believe... 2 9800gtx (in 2-way sli) and 3 9800gtx(in 3-way sli) they have litile difference.... and i think its the same of all graphic cards... and for this i blaim drivers.....