Game stutters like crazy, is memory the issue?

I followed these instructions. FPS did hit like 23. It is smooth, yet still stuttering, even after hitting render scale at 105 and back at 100.

I may need faster memory. My memory IS kind of slow. It’s rated at 2400 MHz. Hwinfo is recording it at 1200MHz (Is that right?) It’s the only thing in my computer that is not up-to-date.