Windows only recognizes 1 GPU RX570

Mining
1

Hello. I’m trying to build my first rig. If I connect 2 gpus to mobo directly, Windows recognizes both without any issues. But once I connect gpu to riser, windows won’t recognize gpu on riser. I tried all pcie slots and all 5 risers. None of them works.

I updated bios to latest version, installed blockchain driver, reinstalled fresh windows, but still didn’t work.

Could it be something wrong with all 5 risers or do I have to set anything on bios? I’m now mining with 2 gpus connect to mobo directly. Please help me with this issue. Thanks

4 x RX570 Nitro+
PSU Seasonic 1000w
120GB SSD
Asrock Z170 Pro4s
Windows 10 Pro
Claymore AMD miner latest version
AMD Adrenalin Edition 18.2.1driver

2

if the GPU works directly on the mobo, but does not work on the riser AND if you have the riser and GPU both powered, then you have bad riser(s)