coral m.2 dual speed question

[eflydata]

I purchased m.2 BM version, But one of them is slow.

lspci

• `03:00.0 PCI bridge: ASMedia Technology Inc. ASM1182e 2-Port PCIe x1 Gen2 Packet Switch
• 04:03.0 PCI bridge: ASMedia Technology Inc. ASM1182e 2-Port PCIe x1 Gen2 Packet Switch
• 04:07.0 PCI bridge: ASMedia Technology Inc. ASM1182e 2-Port PCIe x1 Gen2 Packet Switch
• 05:00.0 System peripheral: Global Unichip Corp. Coral Edge TPU
• 06:00.0 System peripheral: Global Unichip Corp. Coral Edge TPU`

sudo lspci -n -d 1ac1:089a -vvv | grep -i width

• `LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
• LnkSta: Speed 5GT/s, Width x1
• LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
• LnkSta: Speed 2.5GT/s (downgraded), Width x1`