Asus removed beta bios 0605 for the Asus Prime B350-Plus. I'm currently running the beta bios and have not encountered any issues. the temperatures appear to be within acceptable range, but then again I'm NOT overclocking the 1700, I did encounter a Windows StopCode ( Bluescreen ) just after flashing but then bumped up the memory voltage from 1.2v to 1.3v to stop getting them. I'm glad it didn't stop while I was flashing the bios. In anycase, the system is running Windows 10 Pro version 1703 build 15063.14 so far the build seems stable. As for the beta bios I will note any issues I encounter and return to document them.
Asus Prime B350-Plus Beta Bios 0605 is available again.