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can MB bottle neck the GPU?

daemondaemon Member UncommonPosts: 680
in Hardware

What Im exactly asking is if this mb :

http://www.msi.com/product/mb/970A-G43.html#hero-specification

 

will bottleneck this GPU:

 

http://www.newegg.com/Product/Product.aspx?Item=N82E16814202099

 

Im asking because that MB has PCI-Express slot 2.

and that GPU does PCI-E 3.0

Will it go slower and if yes how badly? 

 

Cant find a mb with PCI-E 3.0 for amd fx 6300 tho. dunno what to do.

Comments

  • shukoladeshukolade Member UncommonPosts: 113

    PCIE 3.0 is backwards compatible. Meaning you can put a 3.0 GPU on a 2.0 mainboard without problems. 

    If there is any performance loss you won't notice, it's marginal.

  • wyldmagikwyldmagik Member UncommonPosts: 516

    ^^ what he said, its marginal at best and probably wont notice it with a better card than before.

    my son runs a 3.0 card on a 1.1 pci slot, I think the loss is 15% frame rate but because the card is more capable anyhow he gets better performance overall and still more frames and he had with older card.

    I am doing the same with a 970gtx strix on a board that is 2.0

    p.s bare in mind for others, 3.0 cards tend to normally only go backwards compatible down to 1.1 pcie not 1.0.

  • daemondaemon Member UncommonPosts: 680

    so the R9 280s 384-Bit arhitecture will work on the PCI-E 2.0.. it wont go down to 256 bits or something like that?

    thanks for the info guys.

     

  • PhryPhry Member LegendaryPosts: 11,004
    Originally posted by daemon

    so the R9 280s 384-Bit arhitecture will work on the PCI-E 2.0.. it wont go down to 256 bits or something like that?

    thanks for the info guys.

     

    in terms of bandwidth thats pretty small anyway, so i doubt its the bandwidth that the gpu communicates to the board at, or through. which i would expect to be at the very least in Kb/sec or more likely Mb/sec rather than just 'bits'.

  • AthisarAthisar Member UncommonPosts: 666
    It won't matter. PCI-E 3.0 x8 is the same as PCI-E 2.0 x16. There are loads of benchmarks and it's pretty irrelevant as long as you're not on PCI-E 2.0 x4.
  • GdemamiGdemami Member EpicPosts: 12,342

    Originally posted by daemon

    so the R9 280s 384-Bit arhitecture will work on the PCI-E 2.0.. it wont go down to 256 bits or something like that?thanks for the info guys. 

    These are 2 different interfaces.

    384-bit designation on the video card refers to memory width that is used to feed the data into GPU cache, PCI-E then relates to interface between chipset and a video card.

    As long as it is " x8 or x16", 2.0 or 3.0 does not matter.

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