Ah, OK. I entered a ticket to request help, but it turned out I was able to cancel the ticket.
No, my computer is wrapped in NVidia.
The problem was with NVidia. There is a setting:
Control Panel - NVidia Control Panel - Manage 3D Settings - Power Management Mode
That was set by default to: Adaptive.
Once changed to: Prefer Maximum Performance, the game runs smooth as silk again. Well, minor delays with some menus that require communicating with the server and the galaxy map aside and some of the other stuff Andy_3_913 mentioned.
Now, that doesn't mean there is no fault to give to the ED folks. They could have taken this into account, or at least, told us, perhaps under system reqs or their issue FAQ.
This follow-up with information that may be useful to others brought to you by Triggering Monsters Inc.

Thanks to those who offered suggestions and help.
To the rest of you, I am reporting you all to the mods.
(No, I don't do that sort of thing. I don't seek to silence others in the name of dogma.)