One of the biggest concerns AMD had when Vega launched was that miners would grab all available inventory of the card, which seemingly did happen. Now it does take a little bit of tweaking to get effective mining rates with a Radeon RX Vega graphics card, but one Reddit user was able to achieve 43 MH/s in Ethereum mining with just 130 W of power.
Reddit user S1L3N7_D3A7H was able to achieve this by setting the core clocks to 1000 MHz, the HBM2 memory clock at 1100 MHz, and power target at -24%. Now how does this compare to a say tweaked RX 580 card? Well with a tweaked RX 580 graphics card you can typically expect around 30 MH/s with 75W core power, which amounts to around 115W draw per card. The RX Vega is achieving a 43% better hash rate with a small 13% increase in power consumption. Definitely a worthy trade-off for miners.
This means that miners can pack more cards in a single system for a denser configuration with much increased mining performance, over a similarly spec’d out RX 580 mining system. And this was all achieved without AMD’s special-purpose Beta mining driver.
S1L3N7_D3A7H also noted that he could likely achieve the same result with a Vega 56 card. If the prices of these card do go down from the current price surge these could be the new go-to cards for ETH mining.