2 Nvidia 8800 Ultra SLI

Hey guys, I'm new to this forum so I am not sure if this is the right place to ask this:

I bought a Dell XPS 720, Intel Quad Core Q6600 2.40, 3Gb Ram and with with 2 Nvidia 8800 Ultra working on SLI, running Windows Vista. I thought those video cards were enough to play all the games I want but I am having lots of lag in games like Crysis and Gears of War.
I would like to know if this low performance is a problem of my cards or if it's a configuration problem.
Thx for all

I am runnin at the max resolution of my screen 1360 x 768. I got the latest drivers today

I am running everything on max and I am getting 6 to 14 FPS

My guess is your CPU is bottlenecking your cards at that res. What I would do is download GPU-Z and check to see if the cards are running at 100%.

If they aren't, then the CPU is likely bottlenecking them.

Another guess of mine is you don't have quite enough RAM, in a lot of cases you want at least 4gb. Vista loves RAM.

What settings are you trying to run on Crysis? Very High in Direct X10 will run poorly on just about every GPU setup out, and Gears of War on the PC has some issues; sometimes similar setups can have completely different frame rates due to the poor port job.

I used GPUz and it said that my SLI was off..... still without SLI the FPS was low.......but when I turned on my SLI windows had an error ....... now when I try to turn SLI on again nothing happens :S

It's weird.... w SLI when something explodes the FPS goes to 3 lol....

But do you think my CPU isnt enough for Crysis?

I doubt his CPU is the issue; I'm running an ancient socket 939 Athlon X2 4800+ and my Crysis framerates are much better than what he's reporting.