The Holiday Stop Gap: GeForce 6800 GS

SLI and Antialiasing

SLI can end up nearly doubling performance in some cases. In those cases we will see two 6800 GS cards deliver performance on par with a single 7800 GTX. But much more of the time we will see only a modest performance gain from SLI. Since one 7800 GTX costs about the same as two 6800 GS cards, we have to strongly recommend against going with 6800 GS SLI. If performance is desired and the money is there, the 7800 GTX is the better buy by a long shot.

We also generally do not recommend SLI as an upgrade option. The main benefit of multi-GPU technology these days is to increase the maximum performance beyond the fastest single card on the market. ATI and NVIDIA have kept upgrade cycles fairly consistent over the past few years. It makes sense to spend money on a card that will bring increased performance and more features to a system when a new generation of GPU comes out rather than augmenting an aging card with another of the same type. Another argument against SLI-as-upgrade for the 6800 GS in particular is that we have no idea how long the card will be in production.

The memory bandwidth of the 6800 GS makes antialiasing possible on most games at 1280x1024 and below. At higher resolutions, AA performance might not be where we would like. Games like Half-Life 2 will certainly run fine on a 6800 GS with AA enabled at 1600x1200. But the SC:CT and BF2 tests we ran show that the 6800 GS just doesn't have what it takes to make 1600x1200 with 4xAA a reality.

For those who wish to enable AA at higher resolutions, a beefier card would do the trick. The 7800 GT is a good value right now for those with these needs. For users with 1280x1024 panels, or who run at lower resolutions with AA enabled, the 6800 GS is a good fit.