Miner settings are standart - 2 threads with 2016 and 1800 intensity.
Vega 56 crashes with 1800 on the second thread. That might explain the hash difference.
Currently doing 1850 H/s with 2016+1600 threads.
2016+1800 seems stable so far
Is it worth investing in Vega for mining purposes, or should one just stick with AMD RX 580 series.
It depends how much you believe in Monero.
Best card to mine XMR seems to be Vega 56, with 1850 H/s @ 150W for only 399$ (good luck on that price).
Assuming 399 and ignoring power bill, at current monero price each Vega 56 reaches its ROI in 4 months.
A Vega64 (499$) with rednoW's secret improvements, reaches ROI in 5 months, and each next month does $8.41 over Vega 56.
After those 5 months, it will take 11 months (100$ / 8.41$) to have Vega 64 netting more income than the Vega 56.
Now... will XMR continue to rise or fall? Some point it as the coin that BTC always wanted to be, and in the Deep Web XMR seems to be more used than BTC.
Ignoring the future of XMR, Vega 56 + XMR is today one of the best GPU/Coin pairs, if not the best, to reach ROI.
I'm new on mining, so feel free to correct me if I'm making no sense somewhere.
I did a test run and RX Vega 56 was getting a 7%-8% reject rate from expired blocks.
So, the profitability is always 8% below the mining calculators and then you have to factor in the inefficiency for pools to doing the hashes, which further reduces mining payouts.
And, I could not get RX Vega 56 above 1300 hashes.
I think it, it is a bold claim to say anyone will be able to make those returns on mining XMR!