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is the lesser number of pcie graphics the cause of diminishing returns in multi-gpu setup

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  • Graphics
Last response: in Graphics & Displays
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August 9, 2014 9:38:09 AM

hi I was wondering for most motherboards in tri-crossfire have lanes like 8x/4x/4x and I was wondering if these lesser lanes are the reason why you get diminishing returns when you go from 1card to 2cards to 3cards?

if so would I get better results and less diminishing returns if I had/wait for say the 2011 socket in the x99 chipset wich has 40 pcie lanes?

More about : lesser number pcie graphics diminishing returns multi gpu setup

August 9, 2014 9:42:35 AM

SLI needs x8/x8 to work, so finding one that supports SLI, will also let you run CFX at x8/x8
Some 1150 boards can do x16/x16 or x16/x8/x8 or x8/x8/x8/x8
http://www.asus.com/Motherboards/Z97WS/overview/

Some of us don't use multi-gpu setup is because a single card is powerful enough to handle all the games. The other is you need time a patience to make it work and it depends on the game too.
If your playing at Eyefinity level type of resolution, then multi-gpu setup will help as a single card might not be able to handle it.
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August 9, 2014 10:06:44 AM

well I am going to be using a QHD or 4k monitor. but that is kind of off topic, my question is is the reason you get diminishing returns for the more cards you add in crossfire is it because the lower number of pcie lanes you get as you add graphics cards???

I heard that when you add a second card and setupcrossfire you get a 50%boost. however when you add a 3rd card to that crossfire you only get a 25%boost. is the reason this happens because of lesser pcie lanes? if so would having or waiting on the x99 chipset wich has a lot more pcie lanes would that change those numbers much having more lanes by getting a socket 2011-lga

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