StormchildCoA The various UHD Graphics chips are all technically compatible with Sims 3 in that they should be able to run the game. How well they run the game depends on the chip in question and which expansions are installed, but what you've described doesn't sound right.
Anyway, please provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.