They are milliseconds. If ntpd on Windows can really keep the clock
stable to to ~10 microseconds, the recent suggestion posted here to
never use Windows for serious timekeeping might need to be revisited.

--
Miroslav Lichvar

Here's what I see on my Windows PCs:

 http://www.satsignal.eu/mrtg/performance_ntp.php

PCs Feenix, Stamsund, Alta and Bacchus have PPS sources. For the best one (Feenix, which runs XP), I would only claim "a couple of hundred microseconds". The PC Pixie at the top of that page is an Intel Atom system running FreeBSD 8.0.

For many purposes, with one millisecond is quite adequate, for other purpose, it's not.

Cheers,
David
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