Thanks for the reply..
Software: Open Embedded Linux Entertainment Center (OpenELEC) a small Linux based Just Enough Operating System (JeOS).
Streaming from a server, media would freeze for a second and then "catch up". This would occur either every 30 seconds or for a few minutes depending on bitrate.
Stream via wireless is ok.
Swap SSD into a NUC5CPYH same ram, same cables, media plays ok.
From your description, it is hard to say that the LAN port is the issue here, but it is a possibility. Is there any chance you can test one of these Amazon.com: SIIG SuperSpeed USB 3.0 to RJ45 Gigabit Ethernet 10/100/1000 Mbps LAN adapter for Windows and Mac systems: C… instead of the LAN port? That way you would be making sure if the issue is with the LAN port.
Bear in mind that Intel does not test and validate Intel® NUC on Linux; in order to get more feedback regarding this matter contact OpenELEC Mediacenter - OpenELEC Forum - Category Index.
For further reference Supported Operating Systems for Intel® NUC.
Well I managed to get a USB.RJ45 connector.
Booted up the NUC5PPYH with the same ram and SSD after being off line for a week and thought I would make sure that the problem still existed before I connected the usb/rj45 dongle..
So ( somewhat embarrassingly), it worked fine..
Tested on all sorts of media and no buffering...
The only change I could see was that OpenElec had a software upgrade last week. I cannot tell if that had an effect or not.
All I can do at the moment is to keep using the NUC5PPYH and see if the problem returns.
I appreciate your time and help.