I wouldn't run it above 70% capacity, not for efficiency reasons, but durability.
Both reasons are valid, but I think the safe point is 80%, but anyway, you're good with 70%
FFS no way? I've just bought this spec as I couldn't use my Antminer lol. What about cooling it down with something? I think the 580 I bought has a lot of cooling with it?
You'll do some tweaks to reduce heat and power, but it'll generate some heat on the ambient, it's hard toknow exactly bacause we don't have any idea about your space
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This is the card:
https://www.sapphiretech.com/en/consumer/pulse-rx-580-8g-g5-oc-liteI can't find any info about Dual Bios on this GPU, but I have a lot of RX in the past and never bricked a single card, have you tried everything to fix your cards?
About this 31mhs and 75w, this wattage is only for your chip, the entire card will consume at least 130w