The CPU can't possibly get too cold. See for example overclocking performed by cooling the CPU with liquid nitrogen. Condensation is a factor as is lost of ductility of plastic at low temp making it brittle. Expansion and contraction of materials especially when different materials expand to different degrees.
"The CPU can't possibly get too cold" - Untrue. There are plenty of chips with what overclockers like to call "cold bugs".
Sequential logic (flipflops) has a setup time requirement. This means the combinatorial computation between any two connected pairs of flops (output of flop A to input of flop B) has to do its job fast enough such that the input of B stops toggling some amount of time before the next clock edge arrives at the flipflop. Violate that timing, and B will sometimes sample the wrong value, leading to an error.
Setup time is what most people are thinking about when they use LN2 or other exotic forms of cooling. By cooling things down, you usually improve the performance of combinatorial logic, which provides more setup time margin, allowing you to increase clock speed until setup time margin is small again.
But flops also have hold time requirements - their inputs have to remain stable for some amount of time after the clock edge, not just before. It's here where we can run into problems if the circuit is too cold. Imagine a path with relatively little combinatorial logic, and not much wire delay. If you make that path too fast, it might start violating hold time on the destination flop. Boom, shit doesn't work.
Many phones, laptops cameras and similar are only guaranteeing functionally by above 0 degree....
Luckily they often operate in lower temperatures too, but not seldomly by hoping they don't get cooled that much themself (because they are e.g. in your pocket).
Incidentally CPUs do get too cold, not at a reasonable temperature, but sufficiently low temperatures do change the characteristics of semi conductors. Not something to worry about if you're not using liquid nitrogen (or colder).
I've had my phone shut off on me from being out in the Chicago cold for a couple hours. Battery over 50% when I brought it back inside and warmed it up.
The CPU can't possibly get too cold. See for example overclocking performed by cooling the CPU with liquid nitrogen. Condensation is a factor as is lost of ductility of plastic at low temp making it brittle. Expansion and contraction of materials especially when different materials expand to different degrees.
"The CPU can't possibly get too cold" - Untrue. There are plenty of chips with what overclockers like to call "cold bugs".
Sequential logic (flipflops) has a setup time requirement. This means the combinatorial computation between any two connected pairs of flops (output of flop A to input of flop B) has to do its job fast enough such that the input of B stops toggling some amount of time before the next clock edge arrives at the flipflop. Violate that timing, and B will sometimes sample the wrong value, leading to an error.
Setup time is what most people are thinking about when they use LN2 or other exotic forms of cooling. By cooling things down, you usually improve the performance of combinatorial logic, which provides more setup time margin, allowing you to increase clock speed until setup time margin is small again.
But flops also have hold time requirements - their inputs have to remain stable for some amount of time after the clock edge, not just before. It's here where we can run into problems if the circuit is too cold. Imagine a path with relatively little combinatorial logic, and not much wire delay. If you make that path too fast, it might start violating hold time on the destination flop. Boom, shit doesn't work.
Many phones, laptops cameras and similar are only guaranteeing functionally by above 0 degree....
Luckily they often operate in lower temperatures too, but not seldomly by hoping they don't get cooled that much themself (because they are e.g. in your pocket).
0 degree what?
Fahrenheit, Celsius, horizontal angle?
The biggest thing is the battery. The CPU doesnt get too cold, but batteries degrade or stop performing when they get too cold.
Edit: For actual temperatures, in my experience its when the device is in use for a sustained amount of time in under 10f weather
Incidentally CPUs do get too cold, not at a reasonable temperature, but sufficiently low temperatures do change the characteristics of semi conductors. Not something to worry about if you're not using liquid nitrogen (or colder).
I've had my phone shut off on me from being out in the Chicago cold for a couple hours. Battery over 50% when I brought it back inside and warmed it up.
If i go ousode in winter, the bsttery dies around zero degrees. Keep in mind that you laptop could be in a bag in sleep mode or idle