nah don't use a dual psu just get a 1200watt and you will be fine, you can get evga 1200 or 1300 gold or platinum or the 1200 ax from corsair, with 4 x pcie 2x8 pin you just need only 3 cables
yeah ik it would be better option but in my country is hard to get one of these. Was looking mostly for platinum evga / bq but will also look for corsair.
In my country atm those are out of stock:
be quiet! Dark Power Pro P11 modular Netzteil 1200 Watt (platinum)
EVGA SuperNOVA 1300 G2 1300W (gold)
Corsair AX Series 1200W
Corsair 1200W 80 PLUS Platinum, Modular CP-9020008-EU
So thats why im thinking about 2x psu instead of 1 but will try to get 1 maybe after weekend there will be some delivery to shops.