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Can you crossfire a r9 290 with a r9 390?

MLG 360 No-Scopes
By MLG 360 No-Scopes
in Graphics Cards
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Posted

Yes, but not worth it. The 390s extra oc and vram will be unutilized.

Save some money and get a 290

Lets all ripperoni in pepperoni

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Posted

R u high?

Wait, the R9 290 and R9 390 are the same exact thing? GG AMD. 

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No. You can't.

They are the exact same card... just like the 7970 GHz edition and the 280x could be crossfired.

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They are the exact same card... just like the 7970 GHz edition and the 280x could be crossfired.

Then why buy an R9 390 over an R9 290?

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Then why buy an R9 390 over an R9 290?

The 290 will be discontinued, in favor of the 390 all that's left is whatever stock of 290s that are left.

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Then why buy an R9 390 over an R9 290?

 

Cuz it has a 3 instead of a 2 DUH!  /s

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Keep in mind the 290 has 4GB and the 390 has 8GB. Only the 290X has an 8GB version, the 290 doesn't. I forget how this affects CrossFire, maybe someone else can answer that.

 

The 390 would have 8GB but only the 4GB of the 290 could be actually used. Vram can't be shared or stacked atm, maybe with DX12 though.

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The 390 would have 8GB but only the 4GB of the 290 could be actually used. Vram can't be shared or stacked atm, maybe with DX12 though.

 

I know. What I'm saying is some multi-GPU configurations won't allow cards with different amounts of VRAM to be used together. I'm not sure about how CrossFire handles it.

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I know. What I'm saying is some multi-GPU configurations won't allow cards with different amounts of VRAM to be used together. I'm not sure about how CrossFire handles it.

Im think it works the same way just as I said but I'm not 100% sure either.

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Im think it works the same way just as I said but I'm not 100% sure either.

 

I'm pretty sure you cannot crossfire or SLI two cards of different VRAM amounts.

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SLI, no, but crossfire will only let you use the lower amount of the 2 VRAMs.

Will keep that in mind, thanks.

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I know. What I'm saying is some multi-GPU configurations won't allow cards with different amounts of VRAM to be used together. I'm not sure about how CrossFire handles it.

 

It uses the lowest amount of VRAM.

 

So if you have a 4 GB card with a 2 GB card, it will use 2 GB for both cards.

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