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Motherboard with 8 pcie x16 or more graphic cards?

Super cheese sandwichSuper cheese sandwich Posts: 633
in The Commons

My motherboard have 3 slots for cards (It's full now) and I'm going to buy a another card but I would have to change my processor and the motherboard! I live in a country where I all these things costs 200% more than usa... so I'm looking for a big high-end motherboard and a low,mid-end processor for never change it again when I need to add another card

 

Thanks!

Comments

  • BeeMKayBeeMKay Posts: 7,019

    I'm no techie, so  can't answer your question, but if you look into this thread, some points are discussed in there, which might help you with your decision: http://www.daz3d.com/forums/discussion/114436/ot-thinking-about-buying-this-pc-from-cyberpowerpc-any-suggestions#latest

  • LayLo 3DLayLo 3D Posts: 329

    I've only seen dual CPU motherboards with 8 PCIEx16 slots, which means you have to buy two Xeon processors to run all 8 slots. And the ones I have seen usually come as a package, the MB, the case and the power supply. I've been thinking about getting one some day. The cheapest one I've found is $3,500. Even with dual CPUs the PCIE slots will still get configured into x16, x8, x8, x8 per CPU. You can also buy dual CPU motherboards that will run 4 PCIE at x16, so you sacrifice 4 slots so that 4 can run at x16. Are you asking for links to such things, or what are you asking exactly?

  • mtl1mtl1 Posts: 1,508
    edited September 2016

    If you're looking for something lower-cost -- ie. emphasizing PCI-E lanes -- you may want to look at AMD instead. Their processors offload their PCI-E lanes to the motherboard chipset, so you can get away with a relatively inexpensive CPU.

    edit: Then again, I don't recommend buying AMD until next year... Zen is coming out soon.

    Post edited by mtl1 on
  • Kendall SearsKendall Sears Posts: 2,995

    To go beyond 4 PCI-e x16 will very likely put you into server territory (NOT cheap) you are not likely to find anywhere near 8 x16 MB slots in the <$10000US region.  If you're wanting that many slots you're likely going to need an external PCI-e cage.

    Kendall

  • hphoenixhphoenix Posts: 1,335

    If this is for Iray, just buy an nVidia VCA.....

     

  • mjc1016mjc1016 Posts: 15,001
    Kendall Sears said:

    To go beyond 4 PCI-e x16 will very likely put you into server territory (NOT cheap) you are not likely to find anywhere near 8 x16 MB slots in the <$10000US region.  If you're wanting that many slots you're likely going to need an external PCI-e cage.

    Kendall

    Yeah...not cheap and no such thing as cheap CPUs to go in them, either.

  • Super cheese sandwichSuper cheese sandwich Posts: 633
    edited September 2016

     

    Kendall Sears said:

    To go beyond 4 PCI-e x16 will very likely put you into server territory (NOT cheap) you are not likely to find anywhere near 8 x16 MB slots in the <$10000US region.  If you're wanting that many slots you're likely going to need an external PCI-e cage.

    Kendall

    There is a big difference in performance between x16 and x1 If I go for the external pci adapters?

    Post edited by Super cheese sandwich on
  • Super cheese sandwichSuper cheese sandwich Posts: 633

    Here is what I'm trying to explain: 

  • Super cheese sandwichSuper cheese sandwich Posts: 633

    It would be "efficient" to run a graphic card in a x1 slot?

  • Kendall SearsKendall Sears Posts: 2,995
    edited September 2016
    One of your biggest problems is that the vast majority of x16 cards are 2x slots in width. This means that the most you could physically fit on a standard ATX motherboard would be 4. A secondary problem is that Intel chips can only handle so many channels, with x16 PCI-e you're going to need to use multiple Xeon processors to go beyond 4 as well. So now you're looking a big bucks for both the MB and the processors.

    IMO, based on your original post, you'd be best served by going with 1 or 2 "big" video cards and a mid-range MB that can support them.

    Kendall
    Post edited by Kendall Sears on
  • Kendall SearsKendall Sears Posts: 2,995
    Super cheese sandwich said:

     

    Kendall Sears said:

    To go beyond 4 PCI-e x16 will very likely put you into server territory (NOT cheap) you are not likely to find anywhere near 8 x16 MB slots in the <$10000US region.  If you're wanting that many slots you're likely going to need an external PCI-e cage.

    Kendall

    There is a big difference in performance between x16 and x1 If I go for the external pci adapters?

    Most external cages support x16 cards so there is no speed degradation there.

    Kendall
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