The graphics card should be as fast as possible. I cannot recommend anything because your computer has to fit the graphics card.

It cannot work as long as the neXt shows "No input device" in the input monitor (Settings > Input devices). The names and input signals of the first two joystick devices are listed there.

If they are not there, your operating system has not recognized them. So you have to make sure that it is recognized by your operating system.

Sometimes a USB adapter or USB hub can cause problems. So it's best to plug it directly into the computer and remove other USB devices (except the mouse and keyboard).

I have never tested the WS2000. Does this adapter have different operating modes? Maybe you have to set something there?

The Spektrum WS2000 is compatible with the neXt. For sure! i found that: To bind, you press the small bind button on this receiver while inserting into the USB slot, then bind your TX in the usual manner, as if you had inserted a bind plug into a standard receiver. It connected on the first try for me. It supports up to eight channels, and presents itself as a joystick device to Windows so no device drivers are needed.

I don't know which cable you have purchased. Maybe it is not in the compatibility list?

Do you see the WS2000 as a joystick device in the Windows Hardware Manager?