Troubleshooting • Re: Raspberry Pi 4 shows different RAM and revision – Diagnostic Screen shows 1GB, Linux shows 4GB.

Additionally, the OTP revision value is 2e288257, which also decodes as a ?4GB?

2e288257 is the serial number. It doesn't encode anything.

Got it, thank you.

I’m a bit confused. It looks like rpiMike might be right (?) – my Pi might also have had a swapped RAM chip.
I just removed the heatsink and checked the memory chip – it’s a Micron 9VD7Z D9WHV, which seems to be an original 4GB RAM part. Here is a photo.
I also checked some parameters of the chip:So, it seems my Pi might also have been upgraded to a different, but original (?) Micron chip with the full 4GB. The only thing that’s still unclear to me is why RPi OS reports the correct board revision and why vcgencmd measure_clock sdram does not return a proper frequency value?

Statistics: Posted by hetrixq — Sun Jan 11, 2026 4:17 pm

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