Nvidia also only released one chipset in its nForce 500 series for Intel, however, since it was based on the older, poorly overclocking nForce 4 SPP northbridge, Nvidia quickly dumped 500 series for Intel, which gave birth to nForce 600i series chipsets. Today there are four chipsets in the 600i series, 680i SLI, 680i LT SLI, 650i SLI and 650i Ultra in order from high-end to value. nForce 680i SLI while offering the best features and performance also costs an arm and a leg for just the board, leaving little in the budget for a high-end CPU. Nvidia has however come to the rescue with a slightly cut down version of the 680i SLI, the LT SLI series.



Link: Tweaktown