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Apparently a loophole has been made, hax have been coded and SLi is now possible on chipsets other than Nvidia ones. Now, I do know this is possible on the newer chipsets such as X58 but that's for the i5/i7 series. I'm talking about the boards that have 0 proper SLi support, for example Intel's P45 series.

Check it out:
http://www.xdevs.com/e107_plugins/content/content.php?content.30

Don't feel bad From all the posts I saw, it was learned in late 2009 so up until then it was thought impossible. As far as I know, what changed was the new platform that is Crossfire and SLi compatible and thus the unified drivers changed from this. So basically, you can spoof the flag that the new platform motherboards have and enable SLi with a cracked driver. I'm rather tempted to try it since I'm seeing more of a need for SLi (or at least a dual-GPU card) but I don't really think that the cost of another card could be warranted "just to find out" if it indeed works properly.

Knight, you could probably sell your motherboard and side-grade to a Intel-based board. Even though it's an "old" platform, Gigabyte revised the UD3P and came up with the USB3P which takes the UD3P and adds USB3, SATA3, DDR3 and a couple other things.

Right cuz a dual core couldn't run CoD4

This is mostly a reference post but I'll share for others as well. Since I sold my computer, I'm going to an AMD platform, I got to thinking about upgrading my graphics card. One thing led to another and I started looking up SLi info. Obviously it isn't supported but the SLi hack takes care of that. Here's some people running SLi on AMD boards:

http://hardforum.com/showpost.php?p=1036230875&postcount=3
http://www.xtremesystems.org/Forums/showpost.php?p=4458465&postcount=27
http://forums.nvidia.com/index.php?showtopic=182763&st=20&p=1154801&#entry1154801