Gaming
The nForce 680i LT SLI is slightly slower in our Far Cry v1.33 benchmark than the fully-fledged version. All three of the Intel boards do significantly better than the AMD here, which makes the difference between the 680i boards seem minimal.
On the Quake 4 test we can see that the EVGA nForce 680i LT SLI performs significantly better than the 975 board, thanks to the use of NVIDIA graphics cards. Both perform a great deal better than the AM2 board, too. Intel Core 2-based CPUs are, on balance, the better gaming processors.
In our final Splinter Cell tests we're comparing single- and multi-GPU setups. In the low-resolution single-GPU test we can see that the Core 2 Duo is the limiting factor. However when we move to a dual-GPU setup we can see that CrossFired X1900 XTX cards are faster than SLI'd GeForce 7900 GTXs.