# PCI

* [PCIe](#pcie)
  * [Check](#check)
* [Thunderbolt](#thunderbolt)
  * [Chip](#chip)
* [DisplayPort](#displayport)

## PCIe

<https://en.wikipedia.org/wiki/PCI\\_Express#History\\_and\\_revisions>

Per lane:

* Version 1.0a: 2.5 GT/s is 2.5 Gbps on the encoded serial link. This corresponds to 2.0 Gbps of pre-coded data or 250 MB/s
* Version 2.x : 5 GT/s = 500 MB/s
* Version 3.x : 8 GT/s \~= 1 GB/s | upgraded the encoding scheme to 128b/130b from the previous 8b/10b encoding
* Version 4.0 : 16 GT/s \~= 2 GB/s

split: BIOS - PCIe Bifurcation

### Check

* Powershell: <https://superuser.com/questions/1732084/is-there-a-way-to-identify-the-pcie-speed-for-a-device-using-powershell-win10>
* devmgmt.msc : Properties - Details

## Thunderbolt

<https://en.wikipedia.org/wiki/Thunderbolt\\_(interface)>

* Superseded: IEEE 1394 (FireWire) / ExpressCard
* Connector: v1/v2 - Mini-DP ; v3/v4 - USB-C
* v3/v4: 40 Gbit/s (5 GB/s) bidirectional
  * Thunderbolt 3: 4× PCI Express 3.0, DisplayPort 1.2, USB 3.1 Gen 2
  * Thunderbolt 4: 4× PCI Express 3.0, DisplayPort 2.0, USB4
* USB4 compatible with Thunderbolt 3, and backwards compatible with USB 3.2 and USB 2.0

### Chip

* Intel 6000 Series: <https://www.thunderbolttechnology.net/sites/default/files/18-241\\_ThunderboltController\\_Brief\\_HI.pdf>
  * JHL6340: 4 lanes
    * Peripherial Confiuration: 1
* Intel 7000 Series: <https://www.thunderbolttechnology.net/sites/default/files/18-241\\_Thunder7000Controller\\_Brief\\_FIN\\_HI.pdf>
  * JHL7440: 2 Ports, Downstream x4 lanes
    * Peripherial Confiuration: 2 Tunneled, 1 dedicated DP output

## DisplayPort

* 4 lanes: <https://en.wikipedia.org/wiki/DisplayPort#Specifications>
  * Thunderbolt 3 interface which implements up to 8 lanes of DisplayPort


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