DIYbanter - View Single Post - Why aren't computer clocks as accurate as cheap quartz watches?

writes:

That improves the accuracy of the reported time but not of the clocks
themselves.

It improves both. A good NTP server can hold your system clock to
within milliseconds of the correct time; with an accurate local
reference, it can do perhaps 100 times better. The hardware RTC in
your PC won't be any more accurate, but the actual time of date
returned by the system will. It works extremely well.

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