6Gpu Rig And 1 problem

hello guys i have got 6x rx 480 8gb xfx rs
my build is
\Windows 10 Pro 64-bit
CPU
Intel Pentium G3260 @ 3.30GHz 37 °C
Haswell 22nm Technology
RAM
4.00GB Single-Channel DDR3 @ 798MHz (11-11-11-28)
Motherboard
ASUSTeK COMPUTER INC. MAXIMUS VI HERO (SOCKET 1150)
and im mining on etherium when starting mining after 3-5 minutes is freezing screen and crashing what problem is here? power supply problem -
also when trying to work on 5gpu dont working what can i make ?