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Can a PCI-E 2.0 card work on a regular PCI-E slot?

Discussion in 'Graphics Cards' started by CDdude55, Oct 31, 2007.

  1. CDdude55

    CDdude55 Crazy 4 TPU!!!

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    Can it?
  2. wazzledoozle

    wazzledoozle New Member

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    yes
  3. ex_reven New Member

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    Could someone post a few graphics cards that use the 2.0 spec?
    Ive been falling behind with my hardware of late lol.
    :toast:
  4. panchoman

    panchoman Sold my stars!

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    i think the r670 is a pci 2.0 card, correct me if im wrong.
  5. Protius New Member

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    8800gt
  6. francis511

    francis511

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    Pci-e has been designed to be totally backwards compatible( I think)
  7. ex_reven New Member

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    Yeah I think so to. Just like USB.
  8. patton45

    patton45 New Member

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    pci-e is totally back wards compatiable its bacically an increase in the current 2.5ghz bandwidth of pci but the current selection of cards including the ultras and 2900xtx dont even saturate the entire bandwidth of pci-e 1 so dont feel you have to go out and get a new mobo just for your new 8800gt cause it wont sautrate your 1.0 bandwidth and i think the rv670 will be the first pci-e2.0 and dx10.1 compatiable card if it beats the 9800 which as of now its way ahead of it
  9. GrapeApe

    GrapeApe New Member

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    Yes, but there's reported early issues with some PCIe 1.0 spec setups, especially those that are PEG slots running at 4X etc, nut for a standard 16X slot the issue should be minimal as they are designed to be very bckwards compatbile by spec.

    G92 and RV670 cards.

    Also the R600 and other RV6xx cards have been shown to run on PCIe 2.0 boards, and at the very least benefit fromt the additional power if not the improved signalling.

    The R600 showed it before launch running on an early PCIe2.0 board with the need of only 1 of the two power connectors (the other 75W coming fromt the PCIe2.0 slot).
    ex_reven says thanks.
  10. CDdude55

    CDdude55 Crazy 4 TPU!!!

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    Thanks everyone.:)
  11. Protius New Member

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    is there any benchmarks on the performance difference between regular and 2.0 yet?
  12. patton45

    patton45 New Member

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    no because there should be no current peformance difference until the 9800s are out which might actually use more of the avaliable bandwidth currently an 8800 uses only about 60-70% of the avaliable bandwidth so until the new gen cards with gpu that can use i doubt you will see any reviews on the performance differences

    and i hear that pci-e is as future proof as you can get in the computer industry ie (agp will be the standard format for decades to come 3dfx said well that never really happened lol) can someone back that up but the rumor is there already working on a faster 3.0 and that its basically unlimited the future bandwiths
  13. ex_reven New Member

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    They say that like 40-60% of performance of two cards is lost in SLI though. Will PCIE help that? Or is it unrelated?
  14. patton45

    patton45 New Member

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    no those issuse are not hardware related its nvidias incompetence to release a good working drivers when the 7800 gx2 and 7950gx2 game out the two 7900gtx could beat the quad sli of the other two because of drivers . nvidia has not perfected there teq so instead they just add more cards hence tripple sli the pci-e 2 just increase the bandwith and in turn increaseing the watts its doesnt affect nvidias own chipset and driver incompetence.
  15. kwchang007

    kwchang007 New Member

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    Maybe, but that's more due to the fact that running multiple cards creates a large overhead. Because think about it, if you have one card rendering one frame and the other rendering the next, then you have to have something put them together send all to the same place and out put the images in different orders. I don't think they're running out of bandwidth.....yet.
  16. GrapeApe

    GrapeApe New Member

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    The main areas this should help near term are HyperMemory/TurboCache cards , those that use VirtualizedMemory (need WDDM support first though through DX10.1), and workstation cards which use large chunks of system and VRAM.
    For most gaming situations you shouldn't see massive improvement in the current round of top gaming card because they're not as restricted by bus speed because the swaps don't happen as much as the information spend in the VRAM and in the VPU itself.

    You might see a jump in the GTS-320 in some situations where it runs out of VRAM, but even then the improvement will be limited.

    However you won't know until they're properly tested, while bandwidth doesn't seem to be an issue, improved latency could help alot of areas and we could se a small jump across the board, especially in min fps and texxture swaps. Heck, no one thought we used more than 8X bandwidth until they tested it and noticed that ther are a few occasions where it does make a difference. So since we couldn't test beyond the 8x->16X boost who knows, eh?
  17. hugz New Member

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    PCIe 2.0 video card such as 8800GT or RV670XT (3870) is only compatible with motherboards with PCIe 1.1, 1.0a not supported.
  18. KennyT772

    KennyT772 New Member

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    According to what? PCI-E v2 is fully backwards compatable. The two changes are signaling frequency 100mhz to 200mhz, and the specifications for the 8pin power plug.

    Please share with us the reason you claim they are not compatable with 1.0a.
  19. hugz New Member

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    http://support.asus.com/faq/faq.aspx?no=DE05A01F-3A3B-A859-177B-6A668A2D6982&SLanguage=en-us

    :)
  20. ghost101

    ghost101 New Member

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    Quite a few threads on XS mention that PCI-E 1.1 is required.
  21. Frick

    Frick Fishfaced Nincompoop

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    How can one tell which PCIe one has? I assume my motherboard has PCIe 1.1, but it would be nice to know.
  22. hugz New Member

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    yeah, thats another example.
    Last edited: Nov 1, 2007
  23. hugz New Member

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    As far as I know all P35 chipsets got 1.1, 680i got it too

    nForce4 PCIe 1.0a
    MCP67 PCIe 1.1
    MCP61 1.0a
    RD580 PCIe 1.0a
    RS600 PCIe 1.0a
    RS690 PCIe 1.0a
    P35/P31/Q33/Q35/G35/G31 1.1
    P965 and X975 1.0a

    yet another example:

    Your motherboard has got the 1.1 pcie :D
    Last edited: Nov 1, 2007
    Frick says thanks.
  24. KennyT772

    KennyT772 New Member

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    Finnally, someone who does back up their posts with information. I am curious what motherboards have this issue, is it all older motherboards, or just ones with a older xfire/sli chipset.

    I want to know why they are not compatable.
  25. Frick

    Frick Fishfaced Nincompoop

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    I wasn't concerned about my motherboard having PCIe 1.0a. :)

    What I am concerned about is this:

    RD580 PCIe 1.0a
    RS600 PCIe 1.0a
    RS690 PCIe 1.0a
    P965 PCIe 1.0a

    That means a lot of people with kickass motherboards (say a good p965-board) cannot upgrade their graphic cards.. And that's a real shame IMO.

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