Need advice with 4x 290x and 990fxa-UD5

[ati6990]

i use ud7 990fxa and run 4x6990 or 5x7970 , no problem , i think ud5 will be the same, if you dont use smal water coolers the space is hard to calculate using big aircooling thinks , but i never handle those rizzzerzzz , but must work... test it and write down if something dont work.