Hi everryone,

I just got my first rig up and running recently. Decent performances I think but not what I would call first class.
I'm mining using 6 RX480 8G nitro+ at roughly 162MH/s on an ubuntu 16.04 system. Beyond the slightly disapointing hashrate I am a bit worried about the power consumption.
I'm nearly at 1200W at the wall when mining ETH (far less when mining monero). So I started searching for optimisations but it seems most things are for windows all that's left to linux users are BIOS mod.
So I got atiflash working together with the polaris BIOS editor on linux. I managed to get all (I think so) the informations GOUZ would give a windows user... but then I'm not sure how to fiddle with that....
Do you guys have advices or useful links to share?

What are the important bits I should pay attention?

If I flash my BIOS and it doesn't work, can I just restore the original BIOS or is there a real risk to brick my cards?

If my cards are all same brand and model do I still have to mod the BIOS one by one?

Thanks for your insights!