I have that carrier card working in slot 3. I did not connect any additional power nor change the BIOS settings as I left everything at AUTO
It recognized the NVMes without any issues. I used “lspci” to confirm that the 4 NVMe slots were present (as part of the HL-15’s hardware).
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2023-12-03T05:30:00Z
There are 4 PCIe slots on the motherboard:
- Slot 6 which is PCIe x 16
- Slot 5 which is PCIe x 8
- Slot 3 which is PCIe x 8
- Slot 2 which is PCIe x 4 (in x8)
You stated you got it working in Slot 6 but what slot did you used for x8. I got it working in slot 3, can you try that slot?