will the number of pci-e lanes for graphic crossfire setup matter x99

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WINTERLORD

WINTERLORD

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Sep 20, 2008
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I was wondering vs a reguler 1150 haswell socket if the increased number of lanes 16x8x4x vs 16x4x4x

in a crossfire setup does this make a big difference in performance I will be doing tri-crossfire 3cards

haswell vs haswell -E for 3 and 4x crosffire/SLI
 
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k1114
With 3 gpus, a regular z97 has 16 lanes so is 8/4/4, a regular x99 has 40 lanes so is 16/16/8. The 3.0 x4 is going to decrease performance around 5% so isn't much of a issue. Many z97 are 2.0 x4 for the third slot so make sure it's a 3.0 x4 like GA-Z97X-UD5H. But it is close in price to a mobo with plx so you might want to just spend a little more to get a GA-Z97X-Gaming GT.
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Eximo

Eximo

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May 27, 2010
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I'm not aware of a Haswell board that offers anything other then 16x and 8x\8x (Found a few, seem to be the mid-range boards) There are a few Z97 out there with PLX chips that allow quad SLI and Crossfire, but while the cards run at 8x each, the CPU still only has 24x lanes total 8 reserved for various hardware.

X79 and X99 also usually do 16x/16x and 16x\8x\8x, if I recall correctly, with their 40 available lanes, again 8 reserved for other hardware.
 
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k1114

k1114

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With 3 gpus, a regular z97 has 16 lanes so is 8/4/4, a regular x99 has 40 lanes so is 16/16/8. The 3.0 x4 is going to decrease performance around 5% so isn't much of a issue. Many z97 are 2.0 x4 for the third slot so make sure it's a 3.0 x4 like GA-Z97X-UD5H. But it is close in price to a mobo with plx so you might want to just spend a little more to get a GA-Z97X-Gaming GT.
 
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