Will overclocking your PC with no internet access screw up the system time?
Let's say you have a PC which is not connected to a time server, so it has no external methods of keeping track of time. You turn the machine on, and set the time and date in the BIOS.
Then you overclock said PC. Will the time run faster than usual because of the faster CPU cycles?
The system time is not based on the CPU but rather another chip on the motherboard, so overclocking the CPU will not alter the "speed" of the system time.
Nope. The clock is kept by the CMOS, and is not effected by the CPU overclock.