Pcie 2.1 graphics card on pcie 1.1 slot

We have all heard of problems that sometimes happen when running a Pcie 2.1 graphics card on a Pcie 1.0 slot but what about Pcie 1.1? I have never heard of compatibility problems with 1.1
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  1. Stupid firewall at work is blocking me from seeing this, but I'm seeing google results suggesting that it is compatible:

    http://www.eggxpert.com/forums/thread/250483.aspx
  2. All the PCIe specifications are supposed to be backwards compatible, although this does not seem to always be the case they are supposed to be.
  3. Yeah, 2.1 cards are SUPPOSED to work in 1.0 slots

    /fart
  4. Hmmmh Because Im hoping to get a 6xxx card. Because Im gradurating from Secondary school and Im gunna get some congratulation money.
  5. Yes, but im thinking about switching. Because ATI is really doing great since there 5xxx Cards. It was nvidia's time once. Now its Ati's Well imo.
  6. sadly it won't support pcie 1.0 or pcie 1.0a. a pcie 2.1 card would require newer chipset after g31/q965 and require pcie 1.1(at least) to run pcie 2.1 card. even so it is still having issue with some after market card and some certain amd model like 5670/5570. so called the backward compatibility is only applies to reference model in most case(nvidia) or limited to some model(amd).

    keep in mind these chipset under the list do not suppose pcie 2.1 despite pcie has backward compatibility. these chipset will not support pcie 2.1

    nforce 4
    nforce 5
    p4m900/800
    661fx
    p865
    915 all series
    925x
    945 all series(some card may work but not all)
    ati rd580/rd600/rs600 or previous series
    nforce 610i/610a/630/650
    amd 690x and previous series
  7. cheesesubs said:
    sadly it won't support pcie 1.0 or pcie 1.0a. a pcie 2.1 card would require newer chipset after g31/q965 and require pcie 1.1(at least) to run pcie 2.1 card. even so it is still having issue with some after market card and some certain amd model like 5670/5570. so called the backward compatibility is only applies to reference model in most case(nvidia) or limited to some model(amd).

    keep in mind these chipset under the list do not suppose pcie 2.1 despite pcie has backward compatibility. these chipset will not support pcie 2.1

    nforce 4
    nforce 5
    p4m900/800
    661fx
    p865
    915 all series
    925x
    945 all series(some card may work but not all)
    ati rd580/rd600/rs600 or previous series
    nforce 610i/610a/630/650
    amd 690x and previous series


    From where you have gather these info? I wanna make sure its authenticity, coz in another forum I saw people using PCIE 2 graphics card on P4m900 chipsets.
  8. bhaskarb said:
    From where you have gather these info? I wanna make sure its authenticity, coz in another forum I saw people using PCIE 2 graphics card on P4m900 chipsets.


    There is a difference with PCI-e 2.0 and PCI-e 2.1 cards. A PCI-e 2.0 card is backwards compatible with a PCI-e 1.0 slot. That is not the case with all PCI-e 2.1 cards. It basically boils down to if the PCI-e 1.x slot in the motherboard is properly configured or supported by the chipset.

    Some motherboard manufacturers have released BIOS updates for older motherboards with PCI-e 1.x slot to be compatible with PCI-e 2.1 cards, but you have to check specifically for your motherboard.
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