PCI 5V Card on PCI-X Slot

I've been researching into finding out if a PCI 5Volt card is compatible with a PCI-X Slot.  I found forums and papers saying that PCI-X does not like 5V cards or 5V cards does not work with PCI-X.. Can someone confirm this?
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pbyeohAsked:
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ablanton02Commented:
The PCI-X bus is NOT compatible with older 5-volt cards. But if you can check the specification on the PCI card to see if it supports PCI spec 2.1 or higher, it should be able to also run at a supported 3.3 voltage.
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pbyeohAuthor Commented:
The card specification says PCI 2.2 but on the same line says 5V required.  I am confused..
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ablanton02Commented:
That does seem odd. Have you checked the specific MFC on the card for any details? I would double-check there, and then just give it a try. :-)
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MrWidCommented:
Hi, PCI cards with two cut-out slots on the edge connector rather than just the one, have always worked on my PCI-X. The second slot was introduced to define non 5v card.
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