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RE: pci-x slots

To: "pci-sig" <pci-sig@znyx.com>
Subject: RE: pci-x slots
From: "Ingraham, Andrew" <Andrew.Ingraham@hp.com>
Date: Fri, 26 Jul 2002 09:02:38 -0400
Resent-Date: Fri, 26 Jul 2002 06:13:28 -0700
Resent-From: pci-sig@znyx.com
Resent-Message-ID: <WXyQxC.A.xpE.mkUQ9@electra>
Resent-Sender: pci-sig-request@znyx.com
Thread-Index: AcI0F/Ei32e6Fn2wTbS6QeeYJygAGgAiz+R4
Thread-Topic: pci-x slots

> Does anyone know if the pci-x slots are differents that the 64 universal pci slots?
 
Depends on what you're asking.

Yes, PCI-X differs from PCI.

Yes, the connector pinout differs SLIGHTLY from PCI, in a compatible way.

No the physical connectors are not different.  (There is no "universal" PCI connector for the motherboard.  There are "universal" plug-in cards that can be plugged into connectors with either 5V or 3.3V keying.  PCI-X is 3.3V only, so PCI-X connectors on the motherboard are keyed for 3.3V only.  PCI-X cards CAN be keyed for "universal" signaling, but that only comes into play when used in PCI mode ... when plugged into a PCI bus.  In PCI-X mode, it's 3.3V only.)

Regards,
Andy

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