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Will a PCI-e x4 or x8 SAS RAID controller card work in x16 slot?

Discussion in 'Storage' started by KBD, Sep 24, 2008.

  1. KBD New Member

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    Basically, i need to know if it will work. Someone i know wants to get a SAS RAID Controller card and some drives for a workstation or server, his board only has a spare PCI-e x16 slot and some PCI. He prefers a PCI-e card, but he'll take a PCI-X as well, i heard those work in a conventional PCI slot, correct?
  2. newtekie1

    newtekie1 Semi-Retired Folder

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    Yes, PCI-E slots will accept lower cards. A PCI-E x16 slot will accept pretty much any PCI-E.
    KBD says thanks.
    Crunching for Team TPU More than 25k PPD
  3. twicksisted

    twicksisted

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    yep... i run my PCI-E X1 asus Xonar D2X soundcard in a pci-e X16 slot perfectly ;)
  4. niko084

    niko084

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    Pci-X wont work in a pci slot though.
  5. KBD New Member

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    thnx guys.

    :toast:



    I don't know, niko, you sure? I heard otherwise. Take a look at this Adaptec card at egg, it says it supports both PCI-X and PCI 33/66:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16816103038

    I assume it depends on the card, is that right?
  6. Fastmix

    Fastmix New Member

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    Offcourse, it's backwards compatible.
  7. newtekie1

    newtekie1 Semi-Retired Folder

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    It depends on the card, some PCI-X cards work in PCI slots, some don't.
    KBD says thanks.
    Crunching for Team TPU More than 25k PPD
  8. KBD New Member

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    Thats what i thought, thnx!
  9. niko084

    niko084

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  10. DanTheBanjoman Señor Moderator

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    SAS for performance and then bottlenecking it with a PCI slot. That's brilliant.

    Anyway, PCI-e cards go in PCI-e slots, that's all there is to it. You can also put a x16 card in a x1 slot and vice versa. Just have to cut away the back plastic of the slot or cut in the card.
    KBD says thanks.
  11. DanTheBanjoman Señor Moderator

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    It works just fine. At 133MB/s.
  12. niko084

    niko084

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    Aw, well that's not too bad, is that combined total then?
  13. DanTheBanjoman Señor Moderator

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    Combined?

    PCI = 133MB/s for the whole bus. ie a set of two SAS disks will be severely bottlenecked already. A single disk could even be bottlenecked if there are more PCI devices on the bus. Only a *insert mean word* would buy an expensive controller, expensive disks and then put it in a PCI slot.
    For instance, in ATTO I can reach 277MB/s read, if I put my controller in a PCI slot that's gonna be ~120MB/s. Quite a difference I'd say.
    KBD says thanks.
  14. niko084

    niko084

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    Ya sorry that's what I meant, a total of 133MB/s.

    And ya, you would have to be pretty "something" to buy SAS drives and a hot controller and then cut it short.....

    I was personally thinking about buying a pci-e x1 controller for a 2x drive stripe and changed my mind real fast.
  15. KBD New Member

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    Thank you for your explanation. Like i said he prefers PCI-e not PCI-X, i'll have to explain to him that he shouldnt save money and buy a PCI-X one but go straight for PCI-e. He already has the drives but his budget is not huge thats why he looking to get a used card on ebay. Anyway, you guys were very helpful as usual. :)


    Anyway, can someone recomend a good SAS controller card from experience? Not many reviews out there.
  16. niko084

    niko084

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    I have always had great luck with Adaptec controllers, but you kinda pay for them too..

    I have heard good things about highpoint and 3com.
  17. lemonadesoda

    lemonadesoda

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    His options are PCI-X or PCI-e. He should not go PCI. That is what people are saying. PCI-X is OK in theory, since PCI-X (http://en.wikipedia.org/wiki/PCI-X) has plenty of bandwidth for a dual SAS setup. But a PCI-X card in a PCI slot is as bad as just a simple PCI card. So NO unless you have a genuine PCI-X slot.
  18. KBD New Member

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    Thats what i told him, Adaptec and Areca (its way too expensive). He is also looking at LSI. Any specific model numbers someone can offer? I told him it will cost him to get a good one, he looked at online stores but right now looking on ebay there are some relatively inexpensive ones there.
  19. niko084

    niko084

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    Does he want full hardware with a processor and ram on the card, is he going to run raid, if so what setup?
  20. KBD New Member

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    he already has all the hardware, from what i understand he's using his own desktop PC and tranforming it, i dont even know what hardware he has. I know he got no PCI-X so i assume just a plain desktop board most likely SLI or Crossfire with dual x16 slots.
  21. niko084

    niko084

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    Hold on, this guy wants SAS drives for his Desktop????

    *sounds like more money than brains*
  22. KBD New Member

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    lol, actually hes not rich, i beleive he is tranforming it into a server or a workstation.

    Besides, having SAS drives on a desktop would rock! Unfortunately no desktop board suppports em. Im actually getting 2 74Gb Veloci for RAID 0 soon, if i could plug those new 15.6K Cheetahs in my mobo i'll def get them instead.
    Last edited: Sep 25, 2008
  23. niko084

    niko084

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    Although I can understand the massive speed, its just such a waste...
    Go skulltrail while your at it I mean..
  24. KBD New Member

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    well, it depends what you are using the system for i guess. i certainly wouldn't find lightning speeds, to each is own i suppose.
    Last edited: Sep 25, 2008

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