Nvidia's nForce 780i SLI chipset @ Tech Report
 

*Source: Tech Report (http://techreport.com/articles.x/13790)*
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If you want to combine one of Intel's swanky new 45nm processors with an SLI multi-GPU graphics configuration, there's a problem. You see, while nForce 600-series chipsets are compatible with Intel's latest Penryn-based CPUs, current motherboard implementations are not. The incompatibility runs deeper than what can be addressed with a simple BIOS update, as well—a board-level circuit change is required.

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