I am going to have two EVGA GTX 570 2.5GBs running in SLI in a Rosewill Blackhawk case.
I have a lot of airflow with two intake fans in the front, one on the bottom, and 3-4 exhaust fans, two on top, one on the side, and one on the back. Will that be enough airflow to have them in SLI? I will not be overclocking them (as I hear 2.5GB 570s don't overclock very well). Thanks for the help!
You will probably be fine with that setup. Dual card setups are usually only a problem if you want to overclock the graphics cards to very high levels or if you rely on something like a single exhaust fan for cooling.
2 intake + 4 exhaust will be plenty to keep the cards cool. Your temps will be higher than with a single card (obviously), but they shouldn't be problematic.
Am I right in thinking that I will have more space and that the cards will not be right on top of each other like some mobos? That question being answered will also help a lot. Thanks for the reply bigmack!
Yup you're good to go - you should have some space between the cards and with that much ventilation you shouldn't have any heat issues. With that much ventilation, I wouldn't expect heat issues even if the cards had no space between them.
If you DO for some reason run into heat problems, turn your side fan from an exhaust to an intake. Often, the side fan cools your GPUs better if it is blowing cold air down on them (especially since you have top exhaust fans which can draw that air up and expel it).
:edit: I know this is unsolicited advice, so feel free to ignore it, but if you're paying $400 for those cards you may want to consider bumping up to $450 to get two 7950s... they are far superior in terms of performance for just a few bucks more.