Crossfire r9 390 with r9 390x

NotHimAgain · Mar 7, 2016

Ok so i have a r9 390 and i have a opportunity to have a r9 390x for about the samenprice but if i crossfire those two would the 390x settle down for the 390's speed of can they both run independently of each other?

ShakedG · Mar 7, 2016

Neither really. You would see an overall improvement, kind of some combination of both GPUs. You shouldn't see a performance decrease if that's what you're worried about.

NotHimAgain · Mar 7, 2016

ShakedG :

Ok bit would it have the same perfomance if i had only another 390 instead of a 390x?

Dunlop0078 · Mar 7, 2016

I dont really know to be honest, the most I could dig up is that it will work. They will both run at the same clock speed so if your 390 has a lower base clock then the 390x its going to run at the slower speed, unless you overclok them of course. But as far as if it will use the extra shading units, texture mapping units and stuff like that in the 390x I really dont know, if somebody has the answer I would like to know im curious as well. Best I can say is put the 390x in the top slot as the first card and maybe it will.

KLawinger · Mar 7, 2016

It will work just fine although the 390x will be capped at 390 speeds

ShakedG · Mar 7, 2016

Dunlop0078 :

Sounds about right. My initial assumption was that it would utilize all the shading units, but then again there is a chance it won't. Interesting.

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Crossfire r9 390 with r9 390x

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