including what risers you are using , how you powering your risers , system memory , did you installed win 10 in legacy or uefi mode , are you able to get into the bios setting when 5 gpu is connected to the mobo ? you see the bios post , but windows is not loading
Are you plugging in the gpu when your system is powered up ?
risers: pce164p ver 007
16 x memory ddr4 2133 mhs
procesor inel celeron 1151 dual 3.3
Can see bios if I unplug 1 gpu
And yes on the plugging part ( its not me, im just helping my friend/cousin)