Just need to figure out how much air i need to move...
i am guessing that funeling 2 miners (620watt) into a fan each would be a drop in the sea? 336cfm total.
edit:
Best ive found sofar is a 10" 72watt 2300rpm, rated 800m3, 2 of them would give 941cfm.
not too bad pricewise at 30$ each.
dayum...why didn't ya just get a cheap attic heat exhaust fan like me? 1300cfm should be nuff to vent the heat of those cards...it's handling 4kw heat for me 
How loud is that thing?
Looking at the webpages of varius stores in my area they all sell the same exhaust fans that are 95m3h (3354cfh) so only 56cfm at 15$. How loud is that thing?i am guessing that funeling 2 miners (620watt) into a fan each would be a drop in the sea? 336cfm total.
edit:
Best ive found sofar is a 10" 72watt 2300rpm, rated 800m3, 2 of them would give 941cfm.
not too bad pricewise at 30$ each.
You are right. Not many big workhorses out their. This on is not bad at 6900 cfm but it's pricing. I searched under "whole house attic fan."
http://www.lifeandhome.com/air-vent-54508-whole-house-fans-36-6900-cfm.html?gclid=CjwKEAjwjN2eBRDbyPWl0JLY5lYSJACPo0UiYf7fUxnwyWoL-01sFHuyQKTh2hR4sW8weNvNLFqUYxoChGrw_wcB