Seems like you had an unlucky card, as far as voltages required to run those frequencies at least. Mine, which can’t go past 1702 mhz @1200mV in wattman in no way possible, runs at 1560mhz in-game at 1065mV (stock frequency in wattman). 1125mV seems (to me) quite high. Or that 1613mhz is the in-game frequency? ‘Cause in that case, well, it’s a different (better) story... Regarding mem, I’ve heard that a lot of Vega 64’s hbm can run stable at 1100mhz, maybe the 8gb chips of FEs are more troublesome at higher frequencies than 4gb ones in 64s?