Graphics freeze momentarily every second

[Cantoris]

I do have the newest drivers already installed.

I wonder if the new drivers improve performance for new cards at the expense of compatibility with older cards. I've seen problems on other PCs before where new drivers on an old card lead to worse performance.

Looks as though I may have to get a new graphics card for this system anyway if it's borderline.

Thanks for your help.

If I do downgrade my driver for the existing card, I'll post back as to what happens to the game.