Re: V I/O pins of PCI

[Ted Firlit <firlit@utmc.aeroflex.com>]

> 
> > Have U seen any motherboards where V I/O pins of PCI slots are floating ?
> > Any comments on this ?
> 
> There should never be any motherboards with floating VI/O pins.  If there is one, it's defective.  All PCI cards should use Vi/o and depend on it being there.
> 
> Andy


FYI, I have come across a V I/O problem during system-integration with PCI riser cards:

VI/O is electrically tied to 5V on the extender we received.  (The keying for the motherboard end is universal, while the keying for the card-insertion end is 5V.)  Thus trying to use this extender with a universal card, and a 3.3V motherboard becomes a problem.  

The solution is to match the extender (which must have either a 3.3V or 5V card-end connector) with the motherboard.  The supplier of the 1U system we bought did not pay attention to this detail.

Ted