I4U NEWS is testing NVIDIA's 3-Way SLI with a trio of NVIDIA 9800 GTX video cards.

When all the testing was done it was apparent that on the same test machine with the same exact settings on some tests 3-way SLI performed better than Quad SLI did. The tradeoff for 3-way SLI is that not all of the boards out there support it, while many support normal SLI. You also give up all of your expansion ports save one (if you are lucky) when you have three cards in your machine.

NVIDIA 3-way SLI with three NVIDIA 9800 GTX Review