built it yesterday for litecoin. turns out it munches more than 1200W so have to install a 1500W PSU for it. four asus 7970s, athlon 215 CPU. i pulled some industrial mechanical switches from a '60s generator control box. need to find analogue amper gauge for it too. took a whole day to cut out this weatherproof electrical meters box. another day to assemble. im tired.
can you share your temperature log? (ambient and gpu)
I'm quite curious to see how hot will be in there
these direct cu gpus are the coolest 7970s out there. i did only one day of testing - couldnt run psu at 110% for too long. but at stock clocks it did 60 to 70 C. overclocked one card peaked at 75 others about 70. oddly enough it ran cooler with door closed hence creating airflow i pressume.