# lspci | grep -i Non-Volatile
01:00.0 Non-Volatile memory controller: Kingston Technology Company, Inc. KC3000/FURY Renegade NVMe SSD E18 (rev 01)
02:00.0 Non-Volatile memory controller: Sandisk Corp WD Black SN770 NVMe SSD (rev 01)
59:00.0 Non-Volatile memory controller: KIOXIA Corporation Device 002a (rev 01)
5a:00.0 Non-Volatile memory controller: KIOXIA Corporation Device 002a (rev 01)
# lspci -vv -s 01:00.0 | grep -w LnkSta
LnkSta: Speed 16GT/s, Width x4
# lspci -vv -s 02:00.0 | grep -w LnkSta
LnkSta: Speed 16GT/s, Width x4
# lspci -vv -s 59:00.0 | grep -w LnkSta
LnkSta: Speed 8GT/s (downgraded), Width x4
# lspci -vv -s 5a:00.0 | grep -w LnkSta
LnkSta: Speed 8GT/s (downgraded), Width x2 (downgraded)