On Wednesday 15 October 2008, ropers wrote:
quoted text
> I don't know if it is possible to use --surrounding physical space
> permitting-- 64bit cards in 32 bit slots (and have them run w/
> reduced performance). IIRC, something like that used to be possible
> back when it came to the transition from 8bit ISA to 16bit ISA slots;
> back then, some 16bit ISA cards could be used in 8bit slots at
> reduced speeds. Whether something like that is possible now with
> 64bit PCI cards I don't know. Maybe someone else knows.

Of course it depends on the design of the specific card, but yes, at 
least *some* 64-bit cards can be used in 32-bit slots. I've seen early 
64-bit PCI SCSI controller cards that were built this way.

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JCR