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This is an old revision of this page, as edited by Rmcii (talk | contribs) at 04:51, 12 May 2006 (BDF/bus enumeration). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Some More Specifications

Due to the fact, that the PCISIG is offering the specs only for its (paying ?) members it would be nice, if there could be some more information be included here. Of course such an article can not substitute for the lack of documentation. People serious about PCI will be PCISIG members anyway. But for some hobbyists and artists, anyway, people, who do not need full technical coverage, but a little more factual overview about the topic, it might be nice to get an extended information about the technology. Personally I would use the physical size specifications (I am designing a 3D model of a motherboard in a CAD program) and I guess, that some electronic-hackers might be interested in a link (or publication) of the signal paths on the bus.

PCI-X

Is it possible to put a "64 bit PCI-X" card in a "normal" 32 bit PCI slot? Will it work properly?

For the most part, yes Snickerdo 01:46, 8 October 2005 (UTC)[reply]

PCI 64

Does anyone know anything about PCI 64? Is it a homonym for some other spec? I can't find any mention of it on the PCI SIG site, but Adaptec (amongst others) label some of their products as PCI 64. Mr. Jones 12:02, 17 Mar 2005 (UTC)

I'm guessing that means 64-bit PCI. 64-bit PCI slots are longer than 32-bit PCI slots, to hold 32 extra pins. --DavidCary 04:06, 21 Jun 2005 (UTC)

Forth, PCI and OpenFirmware

Perhaps someone could elaborate on the Forth boot code that was originally speced in the PCI standard?

I didn't think OpenFirmware, which is surely what you mean, was originally, or is, part of the PCI standard. It was common on Sun workstations and Apple Macs (and still is) and those machines also used PCI busses. But I don't think that either standard was included in the other. --drj

Any thoughts on PCI 2.3?

Somebody should also find out if PCI 2.3 motherboards DO support 5V cards, and then write about it. There seems to be a big confusion about the correct answer on that question. Not even PCI-SIG themselves writes clearly about this on their site. Or do they? At least the reality among PCI 2.3 motherboards, supporting or not supporting 5V cards, does not seem to be clear.

Dell - 64 bit?

I've just opened up a Dell server, and it has extended PCI slots. Are these 64 bit PCI slots, or something proprietry? If so a photo here would be nice. Rich Farmbrough 17:46, 8 Feb 2005 (UTC)

Speed

So PCI 2.2 allows for a "peak transfer" of "533 MB/s"? [1] say that you will be limited to 30 MB/s to 50 MB/s on a non X/Express PCI.--Jerryseinfeld 14:24, 18 Mar 2005 (UTC)

They're talking about 32-bit 33MHz slots. 64-bit 66MHz slots, even if not PCI-X standard, will still get considerably more bandwidth than a standard 32-bit 33MHz slot found in most desktop PCs. Snickerdo 01:48, 8 October 2005 (UTC)[reply]

Universal PCI

The page should definitely have some info on Universal PCI. I.e. PCI cards that accept both 5 V and 3.3 V. (June 22, 2005)

PCI electrical power ratings

Can someone add this info ? How much current can a PCI card draw ?

Aha, I found this two mail messages : http://www.pcisig.com/reflector/msg05240.html http://www.pcisig.com/reflector/msg05243.html

Can someone add this to the article ?

--195.250.201.212 13:07, 8 October 2005 (UTC)[reply]

Low Profile PCI

There is no mention of 'Low Profile' PCI cards.

rates

This site gives rate of 528 decimal MB/s, not 533. Someone who knows these well double check. — Omegatron 15:46, 29 December 2005 (UTC)[reply]

I'm a bit confused here too. AFAIK, 1 KB = 1024 bytes, 1 MB = 1024 KB. In the paragraph "Conventional PCI bus specifications", the calculation is "33.33 MHz × 32 bits ÷ 8 bits/byte = 133 MB/s" but that's really just 133.32 million bytes. So, if you break this down to MB according to the rates above, shouldn't you get 127 MB/s?
ADude, 11 May 2006
Yeah, your math is correct. It's the same conspiracy again hard drive manufacturers saying 1.0 GB when they really mean 1,000,000,000 bytes. Rmcii 04:47, 12 May 2006 (UTC)[reply]

PCI Add-On

There should be a part in this page telling people what can be put on the PCI slots, That would make life easier for people wanting to know more about PCI. Alkady 16:44, 5 February 2006 (UTC)[reply]

BDF/Bus enumeration

I've added some info pertaining to the bus/device/function concept and bus enumeration process to PCI Configuration Space, but I question if the information should remain there or be merged into this article. Does anyone have an opinion or preference? Rmcii 04:51, 12 May 2006 (UTC)[reply]

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