root@Golem:~# lspci -vvs 03:00.0 | grep Lnk
pcilib: sysfs_read_vpd: read failed: Input/output error
LnkCap: Port #0, Speed 5GT/s, Width x8, ASPM L0s, Exit Latency L0s <64ns
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
LnkSta: Speed 5GT/s (ok), Width x4 (downgraded)
LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase