Quoting Justin Piszcz who wrote on Sat 2012-07-07 at 15:43:

> I migrated from an X7SPA to an X9SCM-F-O and now gpsd/ntp no longer sync
> with my GPS unit:
> http://www.amazon.com/GlobalSat-BU-353-USB-GPS-Receiver/dp/B000PKX2KA
> 
> I did some digging and it looks like the system clock on this motherboard
> with the latest BIOS (2.00a) runs 1 second too fast when comparing to other
> NTP-synchronized machines.

> Has anyone seen anything like this before?
> I checked all of the BIOS options, did not see anything out of the ordinary
> here..

Have you checked for BIOS updates? I have a mainboard running which was
over 500ppm wrong (needing adjtimex) until I ran a BIOS update.

In my case:

Base Board Information
        Manufacturer: ASUSTeK Computer INC.
        Product Name: M3A-H/HDMI
        Version: Rev 1.xx

BIOS Information
        Vendor: American Megatrends Inc.
        Version: 1803   
        Release Date: 09/21/2009

                                                  Koos van den Hout

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