RAM latency doesn't affect mouse response in any perceptible way. The fastest gaming mice I know of run at 8000Hz, so that's 125000ns between samples, much bigger than any CAS latency. And most mice run substantially slower.

Maybe your old PC used lower-latency GUI software, e.g. uncomposited Xorg instead of Wayland.

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bullen 19 minutes ago | parent [-]

I only felt it on Windows, maybe tht is due to the special USB mouse drivers Microsoft made? Still motion-to-photon latency is really lower on my DDR3 PCs, would be cool to know why.

	▲	CyberDildonics 5 minutes ago \| parent [-]
		You are conflating two things that have nothing to do with each other. Computers have had mice since the 80s. Still motion-to-photon latency is really lower on my DDR3 PCs, would be cool to know why. No it isn't, your computer is doing tons of stuff and the cursor on windows is a hardware feature of the graphics card. Should I even ask why you think memory bandwidth is the cause of mouse latency?