The 760G chipset supports the FX-8320, but only some 760G motherboards support high 125W TDP (Thermal Design Power) CPUs. Some 760G motherboards only support 95 Watt TDP CPUs.
A couple that support the 125W FX-8320:
ASUS M5A78L-M/USB3
GIGABYTE GA-78LMT-USB3