Q: I have a quad core intel 2.6 and 4GB of DDR2 800.
A: Easily and very well I think. See, my laptop has a single 8800m GTS. I can run crysis on max settings and its mostly playable. Just a single 9800 gt card has almost double the stream processors, 100 more MHz of speed on the graphics clock, 250 more on the processor clock, and 100 more on the memory clock. So with a dual SLI bridge set-up of those, you should be able to run crysis absolutely fine. If you have any trouble, which I doubt will happen, just turn the shadow quality down to medium. You won't see any difference yet it helps framerates substantially.