SLI is a new technology which allows you to run two of the same graphics cards simultaneously :good: This means that you will get a performance/quality boost of 180% of having just the one card, I personally wouldn't get another card until the card you currently has, has dropped in price - or when it starts to get abit fainted an old, but then why bothere with that then? When you do that you might as well just buy a better card for the extra $100..