The GeForce 9800 GTX is an interesting beast.  It has a 1.688GHz shader clock, but the memory subsystem is slimmed to a 512MB framebuffer and a 256-bit memory bus.  That let [H]ard|OCP discover that Crysis wants a fast shader clock more than it wants bandwidth.  The performance doesn’t scale as well as we might want in SLI, but it does add enough performance to be easily noticeable.

“What kind of gameplay experience does GeForce 9800 GTX SLI provide? We evaluate two retail XFX GeForce 9800 GTX video cards on an SLI platform and compare those to GeForce 9800 GX2, GeForce 8800 GTX SLI, and AMD’s Radeon HD 3870 X2 CrossFireX.”

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