This post started as a place to share some CryptoNight Heavy settings, but people are coming from google using more generic terms. if you are looking for miner software to mine cryptonight heavy coins you can try XMRig or XMR-STAK
Here is a selection of miner settings to get the most out of your cards.
these settings are good for: cryptonight_heavy only
Loki Mining Pool
Haven Mining Pool
Vega 56
xmr-stak - 1300h/s~
Vega 64
xmr-stak - 1500H/s~
rx570/580 4GB
XMRig - auto config = 750h/s
https://github.com/xmrig/xmrig-amd/releases/tag/v2.6.0-beta1
xmr-stak - 700h/s~/750h/s~