Just one question, when you say:
If you are serious run your atx at 240v. Better efficiencies no matter the brand.
Do you mean better power efficiency? If so, how do you configure PSUs to run at 240v? At stock they run at 220v right?
Would love to know more.
220 and 240 are generally used interchangeably when talking about US power - the "nominal" value for US split-phase is 117/234 volts, but ACTUAL voltage at the outlet varies widely even excluding "brownout" conditions.
Vega is a VERY good and efficient Monero (XMR) miner, it's only so-so at best directly mining ETH (more than twice the cost and ballpark twice the power draw of the RX 470/480/570/580 cards for well UNDER twice the hashrate).
Since AMD RX 5xx cards have dropped semi-sorta-close to MSRP level pricing in the last couple weeks, there is no reason to even LOOK at anything else on ETH mining (unless you can get a REAL GOOD deal on a used R9 290/290x or the like).
Gold-rated power supplies in general offer ballpark 2% higher efficiency when run from 220 instead of 110 - the exact amount varies a bit depending on the load ON the PS and the specific PS, but at 50% plus load values 2% is a good "ballpark" figure for all of them.