I'd go with the EVGA G2 1000 instead of the GQ.
The GQ series as I recall used a junk "fancy name" sleeve bearing fan, the G2 uses a good ball-bearing fan that WILL last a lot longer in heavy-duty 24/7 use like in a mining environment.
Seasonic X-1000 would be another good choice if they weren't out of production.
Go with the Sapphire "mining" RX cards - lower cost than the actual Nitro, similar performance, cooling is at least as good.
The RX 470 model that has the "no DVI connector" on it in particular has noticeably better cooling than the stock Nitro - but you probably will need ONE card with a video connector on it to hook your monitor to.
Thanks for the advice, i´ll buy the suggested EVGA...
Regarding to the RX Cards, i search for them but i couldn´t find any on my country, but i found SAPPHIRE Radeon NITRO+ RX 580 Special Edition
8GB for the same price, so i think i´ll buy them.
I read that getting an 8gb instead of a 4gb would help to the GPU getting obsolete in a mid-term future like the >3gb AMD cards.