3 Replies Latest reply on Sep 21, 2017 8:31 PM by Intel Corporation

    X550-T2 PCIe 2.0 x4

    krusher_r

      Hello, I'm looking around for an answer to this question and want to confirm something before making a good (or bad) decision...

       

      The specs for the X550-T2 requires a PCIe 3.0 x4 slot; the X540-T2 required a PCIe 2.0 x8 slot I read online.

       

      My motherboard currently only has one PCIe 2.0 x4 slot available.  Would the X550-T2 still work with one 10G connector using PCIe 2.0 and in the future I can upgrade to a PCIe 3.0 and then use both?  Or would the X550-T2 not function correctly under PCIe 2.0?

       

      Thanks!

        • 1. Re: X550-T2 PCIe 2.0 x4
          Intel Corporation
          This message was posted on behalf of Intel Corporation

          Hi Krusher_r,

            Thank you for posting in Wired Communities.  The network adapter is backward compatible to the PCI-E 2.0 slot. As there are many factors affecting the network performance, it is recommended to use the network adapter to a slot that matches or exceeds the bus width of the adapter. Please refer to this website for reference: 

          https://www.intel.com/content/www/us/en/support/network-and-i-o/ethernet-products/000005811.html

            It will work still if you are referring swapping the X550-T2 to the supported PCIe 3.0 slot in the future. Please contact your  motherboard support to check if the X550-T2 is compatible to your board system.  Hope the above information help.


          Thanks,
          Sharon
           

          • 2. Re: X550-T2 PCIe 2.0 x4
            krusher_r

            Thanks for confirming that Sharon; I figured it was likely the case that a single 10G connector would work in a PCIe 2.0 x4 slot for now and then both could be used in a PCIe 3.0 x4 slot in the future as you've stated.  My motherboard is older and I doubt that anything this new would be tested on it for compatibility.

             

            Due to the PCIe 2.0's encoding scheme that is less efficient, each lane delivers 4Gbit/s each direction for a total of 16Gbit/s.  As there is overhead involved, one 10G connector won't use all 16Gbit/s itself but both would easily exceed it and then some.  I just wanted to be sure that the card would handle this scenario for now; with Intel's driver support and lifetime warranty it'll be good for many years to come when I make the upgrade.

             

            Edit: 4x4=16; I used the original unencoded 4x5=20 (fixed it above).

            • 3. Re: X550-T2 PCIe 2.0 x4
              Intel Corporation
              This message was posted on behalf of Intel Corporation

              Hi Krusher_r,

                Thank you for the information and you are welcome

              Regards,
              Sharon