My easy Tips to reduce Input Lag!

[witega]

ECC UDIMMs.

My UDIMMs have on-die ECC. What is the difference between that and an AM5 BIOS setting of "ECC"? Is it preferable to disable it in BIOS and let the on-die ECC do the error correcting instead?

[Slender]

Played a game with them on same core and it felt worse, pc felt more unresponsive in general so I switched back and now it feels better.

sometimes i get delta 1990-2010hz on usb controller. im need restart usb controller 1-10 times to fix it to 1999-2001hz. i cant explain that, but it cause on clear install.

[kyube]

My UDIMMs have on-die ECC. What is the difference between that and an AM5 BIOS setting of "ECC"? Is it preferable to disable it in BIOS and let the on-die ECC do the error correcting instead?

This is a common misconception due to incorrect marketing from DRAM vendors. What I was referring to is side-band ECC
Take a look at these articles:

MemTest86 - ECC overview

Intel — Everything You Need to Know About. Error Correcting Code (ECC) Memory. The difference between ECC and built-in data checking.

How often do ECC errors occur?

ECC vs non-ECC differences for server performance

Somewhat of a tl;dr:
Scenarios where you're protected:
1) “On-die” ECC, “non-ecc” UDIMMs
Transit => no
Rest => yes

2) “SIde-band” ECC UDIMMs:
Transit => yes
Rest => yes&yes (more protection)

Hope this helps.