Thanks for the links Mario.

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The first one in particular gives very useful information about the requirements for achieving very high accuracy with Windows 10 and Windows Server 2016.

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But it needs to be emphasised that these are the requirements to be able to guarantee the relevant level of accuracy, in such a way that you will be supported by Microsoft. But if you don’t meet the requirements it doesn’t meant that you won’t get a good result, just that you’re on your own as regards Microsoft support.

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As I indicated in my earlier post, I get pretty good results with Windows Server 2012 R2, and I’m nowhere near meeting any of those sets of requirements. I’ve now also done the same configuration on Windows 10 Professional on my rather underpowered Surface Pro 2, and that’s pretty good too. If I run a heavy workload on the Surface, the offsets do become a bit erratic. But my server is much more stable, probably because even though it’s running TWS and Gateway, two 40 GByte SQL Server databases, a mail server, and three API data collection programs, it’s actually very lightly loaded as it has 16 virtual processors and those sort of workloads just aren’t very processor intensive (essentially no significant graphics).

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Michael’s posts are interesting, though I must admit to being a bit baffled as to what exactly they’re showing me – I’d need to spend more time working through them to get a clearer understanding. But given that they’re Windows 7, I can’t say I’m surprised that the synchronisation isn’t very good (especially if it’s using the default W32Time settings)? - heck, Windows 7 is 11 years old now, and I certainly have no intention of ever using it again: in my opinion it’s positively out-of-date in practically every way in comparison to Windows 10.

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So my contention is that with an up-to-date version of Windows, with the Windows Time Service correctly configured (which means changing it from the default settings), you’ll get pretty good time syncing even if you’re not close to a stratum 1 time server (mine are about 30ms and 10-15 hops away).

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Richard

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