Vega 56 is as capable as Vega 64, at least when it comes to mining Monero:

This is after I have flashed it with Vega 64's BIOS, of course.
How do you reach this number ?
even with my vega 64, I'm lower than 1000mh/s, missing 500 ..
I have blockchain driver (23 august) , and I use MSI afterburner beta 16 (wattman doesn't work , I don't know why so I don't install it, only drivers)
Core clock 1000 , mem clock 1050 , and voltage is locked (unable to ungray it, maybe because of blockchain drivers)