you need to disable your onboard video. i can see its still enabled here
{
"gpu_id": "0",
"fanspeed": "90",
"temptarget": "70"
},
and here
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 610 (rev 04) (prog-if 00 [VGA controller])
This also looks like you are underpowering one of your risers.
GPU 1: AMD Radeon RX 570, Temp: 25C, Fan: 88%, Core Clock: 1400 Mhz, Memory Clock: 2000 Mhz, Power profile: performance (DPM mode), Power Usage: 2.132 W
GPU 2: AMD Radeon RX 570, Temp: unknown, Fan: unknown, Core Clock: unknown, Memory Clock: unknown,
This is how it always goes on my machine. When one has a power issue i start getting unknown reports from the gputool --status or --config. Once one GPU has an issue the rest of the chain falls out despite there are fine.
I recommend remove on GPU from the chain at a time, reboot and rebuild the gpu-config.json. You also have to reboot after rebuilding it before trying the --status because things about PCI bus config gets cached by the OS.
Its an arduous task but generally helps to isolate a single card.