please help 2 card graphic

[amirheavy666]

I have a main board with 4 PCI-express and 1000 W power
I have a graphic card r9 390x and r9 380
is my power supply (1000 watt) is enough for these two graphic cards for mining?
why my computer will turn off after using these two card graphics after start up. I must changing in bios setting or any pin on main board?
thanks
 

[BigBoom3599]

A 1000 Watt PSU should be plenty for your graphics cards so there's probably something else wrong. Are you using the latest drivers?

[Sharky444]

Your PSU wattage is more than enough. I think your GPUs may be overheating.