After upgrading the memory to 32GB * 4 (a total of 128GB), the system experienced instability after booting up

TrueNAS General
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After upgrading the memory to 32GB * 4 (a total of 128GB), the system experienced unstable conditions after startup, such as the inability to open function pages and the computer automatically restarting from time to time. After troubleshooting the memory issue and replacing one of the 32GB with 8GB, the system stabilized.

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VER：ElectricEel-24.10.2

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Hey and welcome to the forum.

What’s your question? Sounds like you already diagnosed your problem being a faulty DIMM module.

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Obligatory “if you don’t ECC, you get to memtest86+ for 5 days, and you still don’t really know” comment

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There is no problem with installing 4 32GB memory modules, but if they are installed on the computer at the same time (a total of 128GB), the Truenas system will become unstable, with automatic restarts or error messages when opening function pages. If one of the 32GB memory is replaced with 8GB (a total of 104G), there will be no such malfunction. I searched on Google and found that the Truenas scale supports a maximum of 128GB?

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I don’t understand what you mean

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It supports far more than 128GB, no idea where you read that but it’s not the case. It’s not all that uncommon to see systems with >1TB memory running SCALE.

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Run memtest. It doesn’t matter that the system is stable with one set of the modules.
Test the configuration you have/want, not a subset of the config.

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It would help if you posted your hardware details. For examples, expand ‘My Lab’ or ‘Servers’ under essinghigh or neofusion posts above.