Whereas AMD officially launched its 780G chipset and Hybrid Power on Monday, the SLI Power from NVIDIA is still officially under NDA. However, we saw a demonstration at ASRock based on an nForce 780 motherboard (K10N78FullHD-hSLI) which ran a Phenom 9500, 2 GB of DDR2 800 MHz and a GeForce 8400 GS 256 MB.
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The manufacturer had benchmarks. With 3DMark06, launching the Hybrid SLI increases performances by 35%, a convincing score relatively comparable or even superior than what we see with AMD. Let's not forget, however, that the GeForce 8400 GS is an entry level card with slow performances and the activation of Hybrid SLI doesn't seem to make it more appropriate to run recent games.