It's almost fully covered... too much heat will stay inside.
Force air cooling. If you force cold air IN unless you trapped a blackhole inside the hot air will be forced out. Now you are right if you just slapped together some shelves and cards that would be bad. It would require some "ducting".
Don't laugh at my ASCII "art".
Code:
hot air out pulled out
^
| <- bank of GPUs <-|
| ---------------------- |
| <- bank of GPUs <-|
| ---------------------- |
|
^ (cold air forced in)
All the ^ are fans indicating direction of airflow.
Only two banks shown but more could be used.
Hooking all the fans to a fan controller with some temperature probes in each bank could be used to optimize cooling. Upper bank would need higher airflow because air is lazy.
Sorry, don't mean to show off... ok maybe a little
My first one, might be for sale. Uses 6 x 5" extractor fans, 4 as intakes; 1 in the top ducted down to the middle of the gpus, and 3 on the opposite side blowing air onto the back of the gpus. Then 2 fans sucking the hot exhaust heat from the front of the gpus.
And my latest creation, same kind of idea as the first one but much more refined and awesome looking. Using 3 x 6" high pressure long life fans, 4 spigot intakes that are split 2 fans to each two sections, then 1 fan on spigots and ducting extracting all 4 outlets.
Got a 5870 out on miner1 and hoping for a replacement soon then ill have to do something to sort out the cooling on the second 5870 on miner1 as its a bit high.
Air in, air out, as simple as that
+ all the hours tinkering
