New RAM usually just works.

Mostly, yes — the system will auto-detect the new sticks and run them at default speeds (usually 2133MHz or 2400MHz). No BIOS reset needed.

The catch: if you want the RAM to actually run at its rated speed (say, 3200MHz or 3600MHz), you’ll need to enable XMP (Intel) or DOCP (AMD) in the BIOS. That’s one setting, not a full reset. If the system doesn’t boot after installing RAM, clearing CMOS (popping the battery or using the jumper) is the nuclear option, but you shouldn’t need it for a straightforward swap.

Don’t forget to verify speeds in Task Manager or CPU-Z after you’re done. Future You will appreciate the extra frames.