Hello
Its a 1300w edga gold power supply enough to dual mining with 6x of msi r9 390x?
Not really, you will need to undervolt a lot and maybe underclock, and run low -dcri. Even then you are pushing limits of it, consider dual PSUs. Their total TDP is 1650w. Someone on this forum does it, and it is very unstable.
Hello,
And 1300w for 4x msi r9 390x its possible?
4 would probably work, would still want to undervolt just to lessen load a bit.
My rig of (2) 390s and (1) 390x fried a 1200w gold-rated PSU.
I put a meter on it (afterwards, DUH) and saw that the load with dual mining was 1120w.
That's been by experience, anyway.