Crossfire on an x16 PCIE 3.0 and x4 PCIE 2.0?

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Bickering Whale

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Sep 6, 2013
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I am planning to get a R9 280X. If I were to crossfire them in the future, would it be bottlenecked significantly? My motherboard is an Asrock H77 Pro4/MVP
 
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Avro Arrow

Avro Arrow

Splendid
Nov 12, 2009
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PCI-Express 3.0 means nothing. Cards currently only use PCI-Express 2.0 at x8 speed which is why two cards at PCI-Express 2.0 x8/x8 do not suffer a performance penalty. PCI-Express 3.0 at x8/x8 is the same as PCI-Express 2.0 at x16/x16 which was done long ago on the old AMD 790FX chipset, the Intel X58 chipset and one of the nForce chipsets. PCI-Express 3.0 x8/x8 has the same speed as that old standard. Intel and nVidia just market it like it's the next big thing, which it isn't, at least not yet. It will be years before video cards are able to leverage that much bandwidth.
 
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Bickering Whale

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Sep 6, 2013
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So it would be better to just use a single faster GPU rather than looking at crossfire as a future upgrade path? Damn I bought a shit motherboard.
 
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fkr

fkr

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May 24, 2009
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using a single powerful GPU is definitely the best way to go in your scenario. If you watch the deals carefully to can keep upgrading a single GPU on a fairly regular basis. I waited months and the msi twin frzr 7950 went down to $205. that means that I will be able to sell that for $170+ pretty easily as soon as the current GPU prices stabilize.

 
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