First PR-2000 off the line. Generates over 2.0 GH/s using 3x 6990s at stock clocks.
How loud is that? I have one 6990 in a Antec P183 and the fans go nuts when I mine. Even underclocking and undervolting, it's still blasting the fan around 2500-3000RPM to clear the case, and that's with the two egress and one ingress case fan going full bore.
I've always been taught that leaving the case open is not actually good for cooling but I have a feeling these cards are a case unto themselves. Do most of you running 6990s run open? I'll be putting in a spare 5870 soon and I don't want to have to go the water cooled route. (At that point I'll sell it all and just mine on my Mac Pro.)
Should I just go to Home Depot and buy a box fan, open up both sides of the case, and let it rip? :-)
Careful with those box fans. Some of them can consume quite a lot of juice - easily above 40W which is more than a good 140mm fan. I'd go with extra case cooling if possible. Also it strikes me that the P183 doesn't have good air flow, but I could be wrong.