Hey guys, I have a 4x r9 390 rig but recently one of the cards died and I want to replace it. I can buy either a cheap r9 390 8GB which can do about 31mh eth solo and 30/450 dual mining dcr or Msi armor rx 580 4gb for 20% more money (I don't know the hashrate but I doubt it's as good as the 390). My rig has 2x750W PSU, each PSU has 2x 8 and 2x 6pin connector, so they aren't good for future rx cards (meaning, if another r9 390 fails, then 3 or 4 rx cards for one psu) and I know the rx cards can't use 15.12 drivers (which the R9 390 uses). Everything in me says the R9 390 is best choice for this old rig, it's cheaper, faster (uses more power, that's the only downside, but I don't mind). Am I right?
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