[timg236]

Replace rpi-ram-authenticity-check with a tool that reports the SDRAM configuration provisioned when the board was manufacture. Report other important SKU information and use correct SDRAM OTP info rows.
The tool cannot tell if a component was authentic (e.g. could be damanged / replaced) so just report that facts that can be established from OTP

[pelwell]

Nice - this is the output running it on my go-to Pi 5:

OTP manufacturing information

Serial number          : xxxxxxxxxxxxxxxx
QrCode                 : 100091101xxxxxxx
Board revision (OTP)   : 00c04171
  Memory size field    : 4 (4GB)
Board revision (OS)    : 00c04171
  Memory size field    : 4 (4GB)
Ethernet MAC           : 88:a2:9e:xx:yy:zz
Wi-Fi MAC              : 88:a2:9e:xx:yy:zz
Bluetooth MAC          : 88:a2:9e:xx:yy:zz

Board attrs (OTP 33)   : 00000000

SDRAM_CONFIG (OTP 34)  : 00000005
  Manufacture config   : 0x005 32Gbit (4GB) single-rank
  Memory size field    : 4 (4GB) equivalent
  SDRAM_CONFIG size matches board revision (OTP) memory size
  SDRAM_CONFIG size matches board revision (OS) memory size