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PCIe trouble with 4TB Crucial T500 NVMe SSD for >1 power cycle on MSI PRO X670-P


So I just got this drive, and it has worked flawlessly in every other system I’ve tried it in, including my ancient Skylake testbench board. I have an MSI PRO X670-P WIFI, which while otherwise working fine, including with other NVMe drives, is displaying a truly bizarre behavior with this particular drive. And yes, I’ve just swapped out the CPU with a brand new one and the behavior is unchanged, so this isn’t some CPU PCIe circuitry degradation or something. When I install this drive, in any ...

From a not-working state, just turning the machine off, pulling the drive and plugging it back in is all that’s needed to return to working order. I started following this line of thought by pulling the BIOS button cell and disconnecting the ATX power supply, but this board seems to have some quite considerable capacitance somewhere. Hilariously, if I wasn’t simplifying for troubleshooting by relying on the integrated graphics instead of an add-on board, this problem would not have occurred.

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power cycle

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PCIe trouble