What are the PCI-E x1 slots for?

Discussion in 'Motherboards' started by axess68, Sep 29, 2005.

  1. axess68

    axess68 n00b

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    I'm new to PCI-Express. What are those short slots for?
     
  2. Lazn_Work

    Lazn_Work [H]ardness Supreme

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    PCIe 1x devices.

    Eventually PCI (the bigger older usually white slots) will go the way of ISA. Just like PCI and ISA existed on MB's at the same time for a while, PCIe and PCI are both supported for now. But eventually no one will make PCI devices anymore and PCIe 1x is the replacement for lower bandwidth devices.


    ==>Lazn
     
  3. Eva_Unit_0

    Eva_Unit_0 [H]ard|Gawd

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    ^ yep. A good current example of devices "making the move" is network adapters. A gigabit network card can completely saturate the entire pci bus (which is also a gigabit bus) so a pci gigabit card is never going to actually get close to real gigabit speeds. So pci-e gigabit network chips now exist to get higher throughput.

    There are also some pci-e raid controllers since, once again, 133 MB/s could easily be saturated by a high-end raid setup.
     
  4. DangerIsGo

    DangerIsGo 2[H]4U

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    Also, the new PPU (Physics Processing Units) will have PCIe 1x compatibility as well.
     
  5. HOCP4ME

    HOCP4ME 2[H]4U

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    I actually heard that the fastest PhysX chips might take advantage of PCI-Ex4.
     
  6. Malogato

    Malogato Gawd

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    I tried finding a PCI-e faq.. but here's a question I have about PCI-E


    Are "greater" slots backwards compatible to "lesser" cards?

    I've got an EVGA SLI NF4 motherboard.

    It has, physically, from top to bottom

    1 PCI-E x1
    1 PCI-E x8
    1 PCI-E x16
    1 PCI-E x8
    and
    PCI legacy
    PCI legacy
    PCI legacy

    Slots in it.

    Lets say I pop my single PEG-16 card into the PEG-16 slot

    and I want to buy 3 PCI-E x1 raid controllers [just a hypothetical]

    Can I put two of them in the x8 slots? i.e.

    can I have

    Pci-e x1 raid card [in pci-e x1 slot]
    pci-e x1 raid card or hell, network card, sound card [in pci-e x8 slot]
    pci-e x16 video [in pci-e x16 slot]
    pci-e x1 raid card or hell, network card, sound card [in pci-e x8 slot]

    my pci video cap card in PCI slot
    my old IDE raid card in pci slot
    my old scsi card in PCI slot
     
  7. Lazn_Work

    Lazn_Work [H]ardness Supreme

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    Yes, you can put a 1x card into a 16x slot. (or any other PCIe slot)

    ==>Lazn
     
  8. Binkt

    Binkt [H]Lite

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    Hey, I was wondering if there was anyone out there who has stuffed a PCI-E x8 RAID card (areca 1220, 3ware 9550, etc..) into the x16 Pci-express "for Graphics" 16 lane slot?

    Is there any real difference in these slots, or am I good to go?!
     
  9. Lazn_Work

    Lazn_Work [H]ardness Supreme

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    In this thread:
    http://www.hardforum.com/showthread.php?t=913228&page=3

    UICompE02 said:
    "Actually, now that I think about it, I have tested with one of these guys: http://www.hp.com/workstations/pws/xw9300/

    It's an nVidia/AMD thing with dual x16 SLI slots. I was able to use my PCI-E x8 cards in either or both slots without a problem. I don't know how this chipset is different from a standard nForce4, however. Though, they are based on the same design."

    But keep in mind, it probably will not work in a normal SLI slot, as when it is in SLI mode and each slot is in 8x mode, it is not quite normal 8x PCI-E the two slots are "synched." So it should work in the new SLI-16 motherboards, and on nForce Pro boards that have two 16x slots like the K8WE.

    ==>Lazn
     
  10. USMC2Hard4U

    USMC2Hard4U [H]ardness Supreme

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    I find this amazing that people still ask this. The Obvious answer is they will be the replacement for Legacy PCI cards.
     
  11. Ruffy

    Ruffy [H]ard|Gawd

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    personally i want tv tuners to move to PCIe already. Same with sound cards.

    but currently only network and raid cards are avail.
     
  12. vmerc

    vmerc Limp Gawd

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    LOL! "Lower bandwidth" should be taken with humor since PCIe 1x is still faster than AGP 8x (I think 8x or if not it's 4x)
     
  13. Lazn_Work

    Lazn_Work [H]ardness Supreme

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    PCI-E 1x = 250MB/sec

    AGP 8x = 2.2GB/sec

    AGP 4x = 1.1GB/sec

    So nope.

    ==>Lazn
     
  14. vmerc

    vmerc Limp Gawd

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    WTH? I must have been smoking something then. Still 250MB/sec is not bad for "Low Bandwidth"

    I'll have to go look at that Intel graph that was talking about PCIe again.