i see on picture is six gpu 
but you tell only 5 why
but you tell only 5 why
I cannot get the 6th GPU to be recognized by W8.1
Some tips to try fix it from fellow forum members which I will try this weekend.
Just use this mod : https://lbr.id.lv/6xgpu_mod/6xGPU_mod.html
Big thanks ShopemNL for the mod.
All 6 x MSI R9 390 GPUs are working on the ASrock H81 BTC board.
Currently averaging 160MHs without overclocking with qtminer.exe on ethermine.org pool.
Glad to send more members to visit your online shop.
Postnotes:
PSU1 (EVGA1300) = 1180w
PSU2 (EVGA1300) = 580w
Total both PSU = 1760w
This exceeds the EVGA1600 that I planned to do for the other 3 rigs!
Undervolt?