I've read on here that the reference 290x is among the best cards for mining. However, this was prior to the RX480 which gets a better hashrate/power ratio. However, I get fairly cheap power (.07x/kWh).
Is it wise to do this trade? The cards are sapphire tri-x, which appear to use reference boards but with better cooling.
The only reason I wouldn't is because mining seems to be winding down and if the continues its downward trend it price, it won't be profitable to mine for much longer, and then all the other profitable to mine coins will become unprofitable soon after. Also, keeping the 390x for gaming after mining is over is more future proof. Also the 390x has a lifetime warranty from XFX.
I've read that 290x can be flashed with the 390x bios, does anyone have experience with this?
I have one 290x currently. It is a reference board with the shitty AMD cooler on it and it runs pretty hot and LOUD. But hashes at 30-31.