Help with kernel power error 41

[polkovnik]

Please help to solve kernel power 41error, mb GA-780T-D3L  win10 LTSB, when i have installed 3ea rx470 and 2ea r9 280, all gpus work fine, i've changed 280 to rx 480 4gb, now all gpus - rx , so it works only with 4 cards and regardless of what card will be the fifth (on/off via claymore with the buttons of numbers) the PC is immediately shut down.windows system error- kernel power...
Power -  the main atx 700wat system and risers, 5gpus server power unit, or main atx 700 system+ risers +2 cards, 3gpus server power unit, the same thing - shut down, the ram checked, pagefile 20gb, 17.1.1 drivers (16.9.1 same). Maybe problem in motherboard? in some place can not run with 5 new rx cards?