"Some AMD A320 chipset motherboards may need a BIOS update prior to using Raven Ridge CPUs. Upgrading the BIOS may require a different CPU that is supported by older BIOS revisions."
This happened to me when I built a computer for a friend, in the end I had to send the motherboard back to Amazon because there was no way for me to flash it myself. If you can, contact ebuyer and ask if they know/can find out which version of the BIOS is on the mobo prior to purchasing. They might offer a service to update the motherboard themselves, I know that Aria do.