Has anyone had good results on overclocking the PiZero? If so what speeds where achieved?
According to a comment on the Pi Foundation's blog post announcing the recent Raspbian update, due to a bug you should not overclock your Pi Zero. It will actually slow it down.
Simon Long says: 2nd Dec 2015 at 1:57 pm
On Pi Zero, you should just leave overclocking set to “None” (which selects the default clock speeds set for the device in the firmware, i.e. 1GHz on the Zero) – all the other options will actually slow your Pi Zero down! This will be corrected in the next release – Pi Zero basically comes out of the box running as fast as it is safe to run it.
I have overclocked my Pi zero w upto 1.1ghz at 47 degrees celsius without any heatsink or cooling fan. It is possible to overclock without any cooling upto 1.5ghz(i cannot provide the source, it is a portuguese website where people have competitions on overclocking the pi). The highest reached is 1.62ghz with water cooling. Just fiddle with the config file!(you might damage a few sd cards in this process)