How to test the stability of a Thunderbolt port on Mac OS X?

Question

Iron

A glitch in the power supply from the monitor burned out part of the peripherals connected to this monitor: an active DVI adapter to a thunderbold, a usb hub from which the adapter was powered, a usb port on the Mac Pro where the hub was connected and other little things.
Now, on monitors that are connected through surviving adapters, the signal sometimes disappears. It helps to poke the thunderbold into a hot one, sometimes when loading, the poppy does not immediately see them.
I want to somehow load the ports or carry out diagnostics through a special utility, if there is one.
There is a Thunderbolt - pci-express expansion board available, there is an ssd, but it is unlikely to give a large load.
Recommend utilities for testing thunderbolts or some other way to understand if they are affected. Checking on the monitors is a long and not indicative business, because. a glitch coming, and you won’t load the ports heavily with them (DVI-D only).

Answer 1

Thunderbolt on Macs is a multifunctional port, inside there is a chip that "mixes" different data buses through it, depending on which device is connected. The main thing is the transfer of pictures to the monitor and high-speed data transfer.
Usually the port either works or doesn't work at all. You can’t load it especially, it’s just a port, that is, the input-output of the data bus (how can you load the USB port, for example?). This port works to the maximum (more pins are used and more chips on the board) in data transfer mode, i.e. when you connect an external Thunderbolt drive or connect 2 Macs with a cable, the Thunderbolt - pci express adapter is also suitable. You can also download the ASD test for your Mac model, but it will hardly give an error if the port is working.
Of course, a malfunction is possible that the port "falls off" over time. But as for the monitors, in my experience this is more often the problem of cheap Chinese adapters, when the picture sometimes disappears. In general, you need 100% working adapters and observe and look for patterns (for example, do two monicas fall off at the same time or randomly, after what time does the dump occur, etc.)

Answer 2

If TB3 (USB-C) could be checked with this .
And so - I think in the service. Faster and more reliable.