PCI expresss is backward compatibly with PCI SLot?

[hmp_khauff]

When we talk that PCI Express is backward compatible with PCI Slot what we are talking? because phisically isn't compatible.

 

[V3NOM]

pci express 2.0 is backwards compatible with pci express 1.1.

pci is completely different

 

[GhislainG]

PCI-X controllers usually are electrically backward compatible with PCI. Most PCI controllers work in a PCI-X slot. PCI Express is not compatible with PCI.

 

[the last resort]

+1 V3NOM

 

[boulard83]

all true ! PCI-X(X is for a number) cant go with PCI-E

 

[cjl]

X is not for a number. PCI-X is PCI-extended, used for many workstation and server cards. It is mostly backwards compatible with PCI. Neither is compatible (in either direction) with PCI-E. PCI-E 2.0 is backwards compatible with PCI-E 1.1 though.

(see here for more on PCI-X)

 

[jerreece]

PCI-E is definitely a no-go in a PCI slot.

 

[boulard83]

SRy missing some INFO from my post, i mean PCI-x 1.0-2.0