@Riley_S 

Thanks for taking the time to reply. 

When testing with another card connected to the switch, was the card just as capable as the TX401s?

The new card was a 2.5gb NIC by a different company. So it was not a direct comparison  The other test I performed was to use the onboard 1GB LAN it too did not have any issues.

What Connection issues did you see on the other PCs? If possible, can you provide additional information, such as if your bandwidth was cut, if you had increased latency, or simply couldn't connect to the network/internet entirely?

The PCs are in a Surveillance department. the surveillance system provides diagnostic information about video streams that are currently displayed. When one PC reboots not only do we see tearing, streaking, and studdering in the video displayed, but also the diagnostics show continuous loss of packets.

What Version of Windows are you currently running?

Win 10

Do you have another network switch that you can test, or can you connect directly to your ethernet ports further up the line, such as directly to the router? It is possible that a setting or configuration of the network switch is causing the problems - even if it is unmanaged, it may have basic settings for priority or QoS.

We do not have another 10GB capable switch to test.