root@pve:~# dmidecode | grep --color "PCI"
PCI is supported
Internal Reference Designator: J9C1 - PCIE DOCKING CONN
Type: x4 PCI Express 2 x4
Type: x2 PCI Express 2 x2
root@pve:~# lspci -tv
-[0000:00]-+-00.0 Intel Corporation Gemini Lake Host Bridge
+-02.0 Intel Corporation GeminiLake [UHD Graphics 600]
+-0e.0 Intel Corporation Celeron/Pentium Silver Processor High Definition Audio
+-0f.0 Intel Corporation Celeron/Pentium Silver Processor Trusted Execution Engine Interface
+-12.0 Intel Corporation Celeron/Pentium Silver Processor SATA Controller
+-13.0-[01]----00.0 Sandisk Corp WD Black SN750 / PC SN730 NVMe SSD
+-13.2-[02]----00.0 Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller
+-13.3-[03]----00.0 Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller
+-14.0-[04]----00.0 Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller
+-14.1-[05]----00.0 Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller
+-15.0 Intel Corporation Celeron/Pentium Silver Processor USB 3.0 xHCI Controller
+-17.0 Intel Corporation Device 31b4
+-17.1 Intel Corporation Device 31b6
+-17.2 Intel Corporation Device 31b8
+-17.3 Intel Corporation Device 31ba
+-1c.0 Intel Corporation Celeron/Pentium Silver Processor SDA Standard Compliant SD Host Controller
+-1f.0 Intel Corporation Celeron/Pentium Silver Processor LPC Controller
\-1f.1 Intel Corporation Celeron/Pentium Silver Processor Gaussian Mixture Model
root@pve:~# lspci -n | grep -i 13.0.0
00:13.0 0604: 8086:31d8 (rev f6)
root@pve:~# lspci -n -d 8086:31d8 -vvv | grep --color Width
LnkCap: Port #3, Speed 5GT/s, Width x2, ASPM L0s L1, Exit Latency L0s <1us, L1 <4us
LnkSta: Speed 5GT/s (ok), Width x2 (ok)