do you guys think these high hashrate can be achieved with 4gb Ram systems ? (in my case , 1 or 2 vega cards)
No. Currently you will even not see HBCC slider if you have 8 or less gb ram.
Don't even know if 12gb is good.
All positive reports are with 16gb ram
well you're right, I have no slider with 4gb.
I was between 1200 and 1300mh/s with my vega 64 and wattman finally installed.
As I don't have the HBCC slider, I tried to turn off the feature per curiosity.
And I'm achieving 1800mh/s with the 2 thread trick, both @ 1900 intensity.
Don't know yet if it will be stable.
I have to think about : is it worthy to buy more ram now ...