DDR4 RAM 2666MHZ or 3200 MHZ 3891 Desktop

Hello everyone,

I have  a Dell Desktop Inspiron 3891, Intel(R) Quad Core i3-10105 CPU@ 3.7 GHz, 1 stick 8 GB (4DDR) RAM, 1TB Seagate Disk hard drive, 64 bit, Windows 11 Home, on board Intel(R) UHD Graphics 630

Existing RAM that came on the new computer is identified as follows, ADATA, 8GB 1Rx16 PC4-3200AA-UCO-11, 10402742 1.2V DC:2128, AO2P32NC8W1-BD3SHC. The desktop has 2 RAM slots and I am going to install 2 new sticks of 8GB. I’m reading that this desktop RAM can only operate at 2666 MHz. From Dell support and the community I’ve found that 8 GB DDR4 2666 MHZ CL19 and 8GB DDR4 3200 MHz CL22 (or2666 MHz or 2933MHz) meet RAM specifications for this desktop. Actually guess this is minor question but is the fact that one of these type RAM can operate at 3 different speeds make it less efficient than the other type? If so would you even be able to tell any difference in the way the computer operates?

I would appreciate any comments you may have.

Thank you.

Bjarmint