And here I am again with this weird issue...

I recently bought a batch of 24 AORUS RX 580 8GB, majority of'em are samsungs memory based, but there are also some hynix based.

To simplify the matter: i built 2 systems out of of those, 12 cards each and while the first system containing 12 samsung based card is performing very well, the other one is giving me nothing but trouble.
In the other 12 cards i've got 6 samsung cards that perform as well as the rig mentioned above and 6 cards samsung and hynix based (single mem producer at card) that are just a nightmare. Whichever one of those 6 i try to put into the rig (after bios mod), rig just instantly crashes/restarts just after DAG's been created. As if I had a power outage.

I'm posting 6 original bioses of those cards and I'd be grateful I you could just look at them and tell me if there is anything about those cards that I need to know or take into the consideration. It's a weird situation though... as I was binge modding bioses in those cards (one by one, saving each original bios) and the troublesome 6 were also the last 6 i modded. MOdding method was the same and it was the one-click-method by PBE 1.6.5.

I'm looking forward for any hints you can share.

https://mega.nz/#F!q91lhYZa!ozpfdMW-6_ozQ1x6yrK8Pw