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If after all steps the string remains and the system is stable, consider it a harmless ghost debug string left behind by a long-forgotten driver update from early 2020.
sudo i2cdump -y 0 0x50 b Compare bytes 0x05 (module type) and 0x7D – 0x7F (manufacturing date). A healthy DDR4 module should show week/year like 0x20 (week 32) and 0x14 (year 2020). If you see ASCII text "200131" in the hex dump, the EEPROM has been – likely by a rogue overclocking tool or a failing chip. Part 4: The "Driver" Aspect – A Critical Red Herring The term "driver" is misleading. There is no generic "SPD driver" in modern operating systems. The memory controller driver (e.g., mc on Linux, pci.sys on Windows) reads SPD data directly via SMBus. spd driver 200131 top
Using rw-everything (Windows) or i2cset (Linux), you can rewrite the SPD EEPROM from a known-good module of identical spec. However, modules with a mismatched CRC will cause motherboard boot failure. If after all steps the string remains and
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