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I had a similar issue at the beginning of the year; some g. skill ddr4-3200 (with xmp) started bit-flipping on me and causing crashes.

Sure enough on memtest64 those issues were clearly diagnosed.

Haven't changed to ECC hardware, disabling xmp to ddr4-2333 helped with stability.

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I replaced the RAM in my storage machine because of this earlier this year too.

ZFS was reporting all sorts of errors, yet drive tests were showing no issues. I bought about 3 new drives before I realised what the root cause was. A real PITA. Next time I do a hardware refresh, ECC is definitely on the menu.

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