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root@server6:~# lspci -vv |grep LnkCap
                LnkCap: Port #10, Speed 16GT/s, Width x4, ASPM not supported
                LnkCap2: Supported Link Speeds: 2.5-16GT/s, Crosslink- Retimer+ 2Retimers+ DRS-
                LnkCap: Port #11, Speed 16GT/s, Width x4, ASPM not supported
                LnkCap2: Supported Link Speeds: 2.5-16GT/s, Crosslink- Retimer+ 2Retimers+ DRS-
                LnkCap: Port #16, Speed 2.5GT/s, Width x4, ASPM L1, Exit Latency L1 <16us
                LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS-
                LnkCap: Port #17, Speed 2.5GT/s, Width x4, ASPM L1, Exit Latency L1 <16us
                LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS-
                LnkCap: Port #18, Speed 2.5GT/s, Width x4, ASPM L1, Exit Latency L1 <16us
                LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS-
                LnkCap: Port #19, Speed 2.5GT/s, Width x4, ASPM L1, Exit Latency L1 <16us
                LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS-
                LnkCap: Port #5, Speed 16GT/s, Width x1, ASPM not supported
                LnkCap2: Supported Link Speeds: 2.5-16GT/s, Crosslink- Retimer+ 2Retimers+ DRS-
                LnkCap: Port #7, Speed 16GT/s, Width x1, ASPM not supported
                LnkCap2: Supported Link Speeds: 2.5-16GT/s, Crosslink- Retimer+ 2Retimers+ DRS-
                LnkCap: Port #0, Speed 16GT/s, Width x4, ASPM L1, Exit Latency L1 <8us
                LnkCap2: Supported Link Speeds: 2.5-16GT/s, Crosslink- Retimer+ 2Retimers+ DRS-
                LnkCap: Port #0, Speed 8GT/s, Width x4, ASPM L1, Exit Latency L1 <8us
                LnkCap2: Supported Link Speeds: 2.5-8GT/s, Crosslink- Retimer- 2Retimers- DRS-
                LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L1, Exit Latency L1 <4us
                LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s unlimited, L1 <64us
                LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS-

root@server6:~# lspci -vv |grep -e x4 -e x2 -e x8 -e 'NVM Express'
...
01:00.0 Non-Volatile memory controller: Sandisk Corp Device 5049 (rev 01) (prog-if 02 [NVM Express])
                LnkCap: Port #0, Speed 16GT/s, Width x4, ASPM L1, Exit Latency L1 <8us
                LnkSta: Speed 16GT/s, Width x4

02:00.0 Non-Volatile memory controller: Silicon Motion, Inc. SM2263EN/SM2263XT (DRAM-less) NVMe SSD Controllers (rev 03) (prog-if 02 [NVM Express])
                LnkCap: Port #0, Speed 8GT/s, Width x4, ASPM L1, Exit Latency L1 <8us
                LnkSta: Speed 8GT/s, Width x4