First, you need to describe more about your devices, such as what type of cards you are using, Motherboard type, PSUs power, etc.
Many factors can be causing your problem, for example.
You PSU didn't have enough power for powering all of your cards.
Motherboard bios setting, if you describe a Motherboard type, may some our friend here can suggesting you some bios setting for those Motherboard type.
GPU Type and series, some cards with certain conditions need an extra trick to make a system can read those card. Ex, RX series with modded bios, require bypassing bios signature.
...
..etc.
Cool - thanks for the reply. Rig setup:
- GB H110-D3A
- 1000w Corsair PSU
- 6x GTX1060s 3GB
- 006 powered risers (Molex input)
I updated BIOS to newest (think it is v25) and followed instructions as per their website on settings (mining mode enabled does most of it)
I'm powering the risers on 3 Molex chains
Anything else that is of interest?