yes it is true. my device z1 and my friend device is z1, too. we bought them almost same date. both we are using 1409 image verison. we used same config but he made oc to 1000 mhz but i can not. think about how come it is possible. this is strange.
This is called "silicon lottery". Google it.
yes i read it thanks. but it is little bit different. i think manufacturer limited some machines by bios. and then they announced zig1 plus. they sold more.
You can believe what you like, but if they're the same revision and the same firmware, it's a silicon lottery issue.
yes you are right. they manufactured these devices. and then they explorered some chips that runs at higher Mhz. and then they separated them.
after that they manufactured z1 PLUS with separated chips that running higher mhz.