if your game run at 30fps i think it would look laggy and stuttering
do you enable freesync on rx 580 your monitor support it
and what port you use hdmi displayport or another ones ?
you need to check that your adapter is vga to hdmi or hdmi to vga because two of those are different
if it is the hdmi to vga ones it will have male hdmi
you can check the power button pin for sure
use the screwdriver or something else and short the 2pin of power button
mining rig can cause the rust on some connection just make it for sure
sell your two gpus and get the 1060 or 970 it would be better
and you dont need to buy sli supported board so you can go for 2nd intel like i5 6500 and b250 mobo for cheap
go with the dirt cheap xeon e5450 it better than q9650
you will need to mod the bios
and go for gtx 1050 or 750 ti dont go with gtx 970 it will be very huge waste because the cpu will bottleneck with the gpu
and sorry for my bad english :d