so what kind of hashrate am i expecting from a vega 64 or 56 flashed to 64?
1.7-1.8k ?
Mine is a flashed V56 (V64 bios). Without flashing V56 cannot run the HBM2 at 1100 Mhz frequencies.
1960 H/s for Monerov7 and 1460 H/s for cryptonight-heavy is the sustained hashrate I could achieve (using JJ script + xmr-stak) on 18.4.3 drivers.