A question about 64-bit pci slots. plz help

[chasem]

Will a 64 bit pci card fit and operate (at a lower speed) in a 32bit pci slot? plz help!

 

[thorin]

No. A 64bit PCI card has alot more contacts.

Thorin

 

[mechBgon]

AFAIK, 64-bit PCI cards are designed to be backwards-compatible to 32-bit PCI slots. The extra contacts just hang out off the end of the PCI slot. Anyone know if this is an ironclad rule?

 

[Smilin]

I didn't know that I guess.

I know the 66Mhz are backwards compatible to 33Mhz bit I didn't know 64bit went to 32.

 

[sharkeeper]

If the manufacturer allows for reverse compatibility, then yes it will work. I've used 64/66 HBA's in 32/33 slots before albeit much lower performance.

Cheers!

 

[Priit]

AFAIK 33Mhz 64-bit cards should work in usual 32-bit slot (at least those I have seen/read have been working). You can also put 32-bit PCI cards in 33Mhz 64-bit PCI slots. 66Mhz 64-bit PCI slots/cards on the other hand aren't compatible with 32-bit PCI slots (they don't physically fit ).

 

[mechBgon]

That can't be entirely correct... point in case: Adaptec FAQ