Re: 7950 GX2 - Failed to Initialise SLI with unknown error
Does your motherboard support SLI? Although the card is a single board you still need a motherboard with SLI support and I don't think this Intel board supports that. But I'm not 100% sure though (some 945/965 can do it).
Or perhaps the drivers just don't support SLI on Intel boards yet that can also be the case.