There is a dual GPU card called the 6870x2 out there, it's two 6870s on one board. I believe he has this card. Dual GPU cards run hotter than single GPUs, that's a fact of life. As said above, try setting the fans to 100% when gaming. You can use MSI Afterburner if you want to set a custom fan profile. Also check the airflow in your case, with the dual GPU cards you pretty much need to have optimum airflow unless you are using a water cooling solution. You'll probably want a side fan blowing beneath the card to allow for the card's fan to pull in more air.
If the noise is really that much of an issue with you, you may want to look at a water cooling solution, though that will be a hassle. Personally, I'd just game with headphones on, it's cheaper and more convenient than setting up water cooling for your card.
If you have 2 separate cards, make sure that there is at least one slot empty between them, and have a fan mounted on the side of your case blowing into the gap between the cards to ensure both cards get adequate airflow.