Solve : PCIe Backwards Compatible??

1.	Solve : PCIe Backwards Compatible??
Answer» Just real quick- I know OLD PCI cards can be used with PCIe connectors but the speed will be old PCI speed. Can PCIe cards be used with PCI connectors? I doubt it.no they cannot.I should say a bit more. The reason why is because the pci slot is too old of technology to recognize the pci-e card. However, the pci-e slot is newer technology, and is therefore ABLE to read the new and old technology (pci-e cards and pci cards). And to add to that.... as FAR as I know PCI-E is only compatible with PCI on the software level. You can't actually install a PCI card in a PCI-E slot.Quote from: Deerpark on January 30, 2008, 09:49:38 AM And to add to that.... as far as I know PCI-E is only compatible with PCI on the software level. You can't actually install a PCI card in a PCI-E slot. yes, I believe that's correct.Quote from: socrates on January 30, 2008, 09:51:31 AM Quote from: Deerpark on January 30, 2008, 09:49:38 AM And to add to that.... as far as I know PCI-E is only compatible with PCI on the software level. You can't actually install a PCI card in a PCI-E slot. yes, I believe that's correct. If this is true then what purpose does PCI-E backwards compatability with old PCI cards serve? How come this is listed as an advantage for PCI-E? I thought old cards were still supposed to be useable with the new slots.Good question.The point is, if you have software that is purpose written to interface with a specific PCI card, you can change the card to an equivalent PCI-E card and the software will continue to function. The average user will probably NEVER be in a situation where this is an advantage but for enterprises this could potentially save them a lot of MONEY. It will make it a lot more compelling to switch to PCI-E architecture if companies only have to change their hardware and not rewrite their software.

Answer»

Just real quick-

I know OLD PCI cards can be used with PCIe connectors but the speed will be old PCI speed.

Can PCIe cards be used with PCI connectors? I doubt it.no they cannot.I should say a bit more.

The reason why is because the pci slot is too old of technology to recognize the pci-e card. However, the pci-e slot is newer technology, and is therefore ABLE to read the new and old technology (pci-e cards and pci cards). And to add to that.... as FAR as I know PCI-E is only compatible with PCI on the software level. You can't actually install a PCI card in a PCI-E slot.Quote from: Deerpark on January 30, 2008, 09:49:38 AM

And to add to that.... as far as I know PCI-E is only compatible with PCI on the software level. You can't actually install a PCI card in a PCI-E slot.

yes, I believe that's correct.Quote from: socrates on January 30, 2008, 09:51:31 AM

Quote from: Deerpark on January 30, 2008, 09:49:38 AM
And to add to that.... as far as I know PCI-E is only compatible with PCI on the software level. You can't actually install a PCI card in a PCI-E slot.

yes, I believe that's correct.

If this is true then what purpose does PCI-E backwards compatability with old PCI cards serve?
How come this is listed as an advantage for PCI-E? I thought old cards were still supposed to be useable with the new slots.Good question.The point is, if you have software that is purpose written to interface with a specific PCI card, you can change the card to an equivalent PCI-E card and the software will continue to function.
The average user will probably NEVER be in a situation where this is an advantage but for enterprises this could potentially save them a lot of MONEY. It will make it a lot more compelling to switch to PCI-E architecture if companies only have to change their hardware and not rewrite their software.

Solve : PCIe Backwards Compatible??

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