http://www.pcgamer.com/tweaked-radeon-rx-vega-64-card-pummels-polaris-in-mining-performance/

AMD recently said it is doing everything it can to bring more Radeon RX Vega 64 graphics cards to market, but maybe we shouldn't hold our breath. A Reddit forum member posted screenshots of his slightly tweaked Vega 64 card achieving a hash rate of 43.5 MH/s while drawing just 130W of power (104W core power) for his graphics card. If his results end up being par for course, it means Vega 64 will prove an more popular option among miners than previous generation Polaris cards.

To achieve the tantalizing hash rate, Reddit user S1L3N7_D3A7H set his card's core clockspeed to 1,000MHz and the HBM2 memory at 1,100MHz, with a power target of -24 percent.