PCIe 2 Compatible with PCIe 1 or not

I have GA-G31M-ES2L mother board and now i am going to buy a radeon 6670 ddr5 for my board. i am not sure tht PCIe 2 will support PCIe 1. So plz some 1 help with the correct info with links or some kind of proof so that i can get the right thing. This is the specification of my mother board http://www.gigabyte.com/products/product-page.aspx?pid=3485#ov
PLZ HELP ME....
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  1. Hi

    Yes PCI E1 is compatible with PCI E 2 and vise versa. But if you add a PCI E 2 card on a PCI E mobo, your card will downgrade and run at PCI E 1 speeds.

    Hope this helps!
  2. It's compatible
  3. hwo will you update my bios ??? and shld i take the risk to update bios???
  4. and what is mobo ??? i dnt know what is mobo
  5. argha said:
    and what is mobo ??? i dnt know what is mobo

    Mobo stands for motherboard. Here is an article for updating your BIOS.

    http://www.pcworld.com/article/187437/how_to_update_your_bios.html

    Hope this helps!
  6. should i use the the latest update or i have to download each and every update of my bios???
  7. argha said:
    I have GA-G31M-ES2L mother board and now i am going to buy a radeon 6670 ddr5 for my board. i am not sure tht PCIe 2 will support PCIe 1. So plz some 1 help with the correct info with links or some kind of proof so that i can get the right thing. This is the specification of my mother board http://www.gigabyte.com/products/product-page.aspx?pid=3485#ov
    PLZ HELP ME....



    You're sure it's a 2.0 and not a 2.1 version ?
  8. can u tell how will i update my bios???
  9. i dint baught it till now i will buy it and i will buy 2.0 not 2.1??? but why did u asked me this??
  10. Because 2.1 doesn't always work with 1.0.
  11. Pci-ex 2.1 require more power supplayed (double if i'm not remmember it wrong) by the board more than pci-ex 2.0/1.0, so some card can fail to work (not backward compatible)
  12. G31 is PCI-E 1.1.
    PCI-E 2.0 and 2.1 cards should work with that motherboard.
  13. rdc85 said:
    Pci-ex 2.1 require more power supplayed (double if i'm not remmember it wrong) by the board more than pci-ex 2.0/1.0, so some card can fail to work (not backward compatible)


    No, PCIe 2.1 doesn't require more power. It's just different architecture by AMD. Read this article:

    http://www.overclock.net/a/the-final-answer-to-the-controversial-pcie-x16-version-compatibility
  14. As i remember The "2.0" can deliver up to 75 watt power and "2.1" can deliver power up to 150 watt, so some card may work some card don't...

    well after read the version history in wiki it also stated that.. radeon 6670 ddr5 is low powered card it a good posibility it will work with 1.1
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