Talk:PCI Express

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The content of PCI Express Mini Card was merged into PCI Express on February 3, 2009. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists. For the discussion at that location, see its talk page.

On 2 March 2010, PCI Express was linked from Slashdot, a high-traffic website. (Traffic)

All prior and subsequent edits to the article are noted in its revision history.

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"full-size" -- 10W vs 25W

https://en.wikipedia.org/wiki/PCI_Express#Power

the 1st bulleted item says x1 cards are limited to 10W.
the 3rd bulleted item says "full-size" x1 cards may make a grab for 25W.

but what is "full-size"? it is nowhere defined in this article. that is not an official term.

"PCI Express® Card Electromechanical Specification Revision 2.0" section "4.2. Power Consumption" explains the 10W limitation exists for HALF-LENGTH x1 cards; those which are less than 7 inches deep. the reason is for heat dissipation via simple convection.

snippet:

Notes: 1. A standard height x1 add-in card intended for desktop applications is limited in length to a half-length add-in card and 10 W maximum power dissipation. A standard height x1 add-in card intended for server I/O applications with 25 W maximum power dissipation must be greater than or equal to 177.80 mm (7.0 inches) in length, but must not exceed a full-length add-in card. See Table 6-1 for add-in card size definitions. The same server I/O add-in card must, at initial power-up, not exceed 10 W of power dissipation, until configured as a high power device, at which time it must not exceed 25 W of power dissipation. Refer to Chapter 6 of the PCI Express Base Specification, Revision 1.1 for information on the power configuration mechanism.

"PCI Express® Card Electromechanical Specification Revision 3.0" section "4.2. Power Consumption" maintains the ordinary half-length x1 card's 10W limit, but increases other cards' limits to 75W after configuration.

snippet:
• A x1 standard height, half-length card is limited to a 10 W maximum power dissipation. • A x1 low profile card is limited to a 10 W maximum power dissipation. • A x1 standard height, full-length card is limited to a 10 W maximum power dissipation at initial power up. When the card is configured for high power, by default, it must not exceed a 25 W maximum power dissipation or optionally it must not exceed a 75 W maximum power dissipation. A x4/x8 or a x16 standard height or low profile card is limited to a 25 W maximum power dissipation at initial power up. When a card is configured for high power, it must not exceed a 75 W maximum power dissipation.

As can be seen, the Revision 3.0 info (circa 2013) substantially supersedes the content in this Wikipedia article https://en.wikipedia.org/wiki/PCI_Express#Power which is at this point woefully obsolete and inaccurate.

PCI Express Mini -Pin layout, and voltages

PCI Express Mini Card Pin layout should be included. And, PCI Express Mini voltages are stated 1,5 and 3,3 V, whereas the msata variation is specified 5 V. Could somebody resolve this? 87.185.213.192 (talk) 16:41, 25 March 2024 (UTC)[reply]

Broken citation

^: 35–36 in slot power 129.130.18.193 (talk) 02:09, 20 April 2024 (UTC)[reply]

Cabling

The 'cabling' section stops at OCuLink-2; it looks like PCI-SIG put out standards in early 2024 for PCIe 5.0 (and 6.0) cabling: https://www.anandtech.com/show/21379/pcisig-completes-copprlink-cabling-standard-pcie-50-60-get-wired. This round is called 'CopprLink', not 'OCuLink' -- no more allusion to a dream of eventually including optical cabling. 135.180.194.206 (talk) 06:36, 19 May 2024 (UTC)[reply]

Should add: the linked article notes that there is a working group established last year to create an optical cabling standard--so they haven't dropped the dream so much as separated it from the standard they're calling CopprLink.

Basic computer components table

I notice in Basic computer components table in bottom of page that SATA and nvme is put together after SSD which implied they are different version of same thing. They are not.

-SATA is physical bus (the comparison is pcie)

-nvme is the communication protocol FOR bus (the comparison is AHCI)

I don't know wikip structure enough to make change but it seem this only the case for table under PCI Express article. It doesn't appear like this in other article Hyoroemon2 (talk) 03:42, 27 October 2025 (UTC)[reply]

The Template:Basic computer components does not imply such a thing. It simply lists SSDs as components and then points out different variants. --Zac67 (talk) 06:17, 30 October 2025 (UTC)[reply]