mmmm...8x isn't really acceptable. Well, i have the HAF922, which has incredibly good airflow. And i've even stuck an extra fan (from my corsair ram) to push air through from the end of the card as well.
ATM card 2 will sit at 38c no load, card 1 60c no load. Playing crysis or modern warfare 2 for example, bumps card 2 to about 65c, and card 1 to 96c which is close to the gpu's limit. The fans tend to wind up to 100% themselves when watching GPU-Z, so that won't help...the problem is getting airflow into the card.
Are there any decent double spaced LGA1366 boards out there? Price is not really an object at this stage.