As mentioned there are 5 seemingly quick, short, identical beeps in a set and there are 20 sets on startup. According to: https://forum-en.msi.com/faq/article/bios-beep-codes
this could mean:
AMI BIOS:
5 beeps - Processor error - bad processor
AWARD BIOS:
*repeated beeps - DRAM error
*repeated...