Question about some animated objects

Thank you for answering. I tried locking the frame rate to 30 fps on my higher end computer first and I am still seeing the stutter. I ran it with the fps counter cheat on. The fps was generally 29-30 and the object's animations were running smoothly. Then the fps would drop to anywhere between 18-25 fps and these drops corresponded with a stutter. I could not see any pattern to the sudden decrease in fps. I can try this again on the lower end computer if you think there would be some information to be gained but since it didn't work on my better one it didn't seem like that would be helpful.

I've run all these tests with Sims on the lot but locked out of the house so they wouldn't run through the room while I was trying to run the test. The next thing I tried tonight was removing autonomy from the Sims and sending them all off the lot. This didn't seem to have any effect positive or negative on the function of the spinning object.

Is the issue that my computer is simply not high end enough to run the game properly? If so which specs might be too low to run the spinning items smoothly and how high should they be to be sure of having spinning animations work?