Crossfire x16 x4

Connect101 · Dec 4, 2013

Hello,

I have a MB that supports one PCI-E 16x 3.0 and a second PCI-E x4 2.0. I want to crossfire a 270x would I'd expect a huge bottleneck or only minor?

Thanks.

coastie65 · Dec 4, 2013

In all likelyhood it won't work, even if the second slot was x16 2.0.

geofelt · Dec 4, 2013

X4 will not do the job.

Spend your money on a stronger card than the R9-270 when you need more graphics power. Your psu needs will be 200w less too.

sourodip · Dec 7, 2013

First of all DON'T Crossfire,u will experience microstuuter issues. Secondly, doing xfire on x16 and x4 mode decreases performance remarkably.
So invest the whole money on a single powerful gpu like the R9 280x/R9 290.

gene_11 · Dec 8, 2013

you wont notice a performance decrease in that set-up. infact thre will be or you will notice a increase in in speed, microstutter is no longer a problen in new cards as drivers had solve the issue. thew performance depends on the cpu you will use. the difference in bandwith between x4 and x16 is not noticeable unless tested in synthetic benches. i think in games its okey.

a1blaster · Dec 8, 2013

crossfire has been fixed...no microstutter whatsoever...16x and 4x has no problem with 270x
go for it...don't listen to these wannabes who have no personal experience about multi gpu configuration...
multi gpu has been introduced back in 2005...its been 8 years....amd and nvidia are not idiots you know...

Guest · Dec 8, 2013

16x and 4x almost the same as 8x and 8x
I use MB with 16x and 4x before, no problem with crossfire set up

coastie65 · Dec 8, 2013

That is helpful as you have done it.

Guest · Dec 8, 2013

coastie65 :

Thanks

sourodip · Dec 9, 2013

No x16 and x4 was never a microstutter problem. it happens both in SLI and xfire. x16/x4 gives much worse performance than in x8/x8.

archnog · Feb 1, 2014

I had a brainfart and thought my mb had two pcie 3.0, and I bought two 270x. I found out quickly that it is one 3.0x16 and a 2.0x4. While not optimal, I'm only seeing about 10-15% decrease in performance on the second card in crossfire mode at load. It is practically unnoticeable when gaming running highest settings 1920x1080. As cards scale and have more power and throughput that bottleneck with become much more noticeable but I'm not seeing much for gaming on the 270x right now. Practically hangs right there with a Titan for less cash out of pocket. Of course power consumption and heat are always beefed up in any multi GPU configuration

themaskofwraith · Apr 2, 2014

Its a minor bottleneck ,you don't need to worry about it.

http://www12.0zz0.com/2014/02/04/22/846512588.gif

GTX 680 looses 12% in PCI2.0 @4X speed. That means the 4X bandwidth is sufficient for 88% of 680.
And R9 270 performs 10%(+/- 2%) less of 680, so i think ull get 99% of 270's performance.

So go ahead and do the crossfire.

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Crossfire x16 x4

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