Amd crossfire compatibility?

[warofwarrior]

Hello everyone.
I would like to know if mounting a crossfire with a rx 580 could mount one with 8gb of vram in the pcie × 16 and the 4 gb of vram in the second pcie.
Would it work better than if I use 2 rx 580 of 4 gb of vram or equal?

[King_BR0K]

Crossfire is not worth it, if you have two rx 580s sell one

[Supafly]

I know that for Nvidia SLI Vram needs to be the same on both cards. I'd assume it would be the same for AMD Crossfire as it's a similar process.

[[☥] - CJ -]

even if you could crossfire them, youd probably be at the limitation of the 4GB as it would be the weaker card.

dont mix cards that way

[Arya]

Even if you could get this working, Crossfire setups just aren't worth the money or the effort. You won't get enough performance boost to justify the extra power or heat, or the added problems and compatbility nightmares that come with a dual-card setup.

If you want more power, the most cost-effective way forward would be selling both cards and buying a single powerful GPU. Like a 1080 or 1070Ti.

[Bad 💀 Motha]

Yea it's not really a question of will it work; yes a 580 8GB + 580 4GB will CrossFire together in the same system; but then you'd be limited to 4GB of total VRAM due to the weaker spec'd card.

Best bet is just use 1x 580 8GB; or sell off both and buy a single GPU that performs better overall; like GTX 1070 or better.

[Arya]

Originally posted by Bad_Motha:

Yea it's not really a question of will it work; yes a 580 8GB + 580 4GB will CrossFire together in the same system; but then you'd be limited to 4GB of total VRAM due to the weaker spec'd card.

Best bet is just use 1x 580 8GB; or sell off both and buy a single GPU that performs better overall; like GTX 1070 or better.

Two 580s should get you a good way towards a 1070. Even in these prices. And that's a much better card with much higher performance than crossfire 580s.

[Bad 💀 Motha]

Yes but CrossFire is just bad, it does not work out very well.
And the OP would not get the full usage of that better 580 8GB.

[Radioaktivist]

Funny how people still fall for sli and crossfire.

[Monk]

Nothing to fall for, sli works great IF you accept the limitations and do it with the top model cards, so there isn't a better single card option available, plus, it looks really cool, honestly those who say it's buggy and doesn't work haven't ever used it or did so years ago, I've run sli for the past 4 years now and I've had only one actual bad experience, which was fixed by setting it to disable the second card for that game.

[FeilDOW]

Like monk says it does work. I ran crossfire 290x's for years and it worked with tons of games but it really depends on your CPU as well, when I upgraded my 4690k was really starting to bottleneck them in a lot of new games.

CF 290x' we're on par with a 1080 so CF 580's will be much better than a 1070 with supported games.

[warofwarrior]

I do not know why they reject the CF, for those who already have a radeon and want to expand it is much cheaper than buying me a gtx 1080 with a minimum gsync monitor are 1200 euros between 2. Now that they are sold out but a rx 580 4GB I get 250 at its normal price.
by the way in the internet bench there is a technical tie between the cf of rx580 and a 1080. In some games the CF wins and in others the gtx.

[Cathulhu]

Yeah, in games where CF works properly. Which is the exception rather than the norm.
Most of the time games do not support it at all, or only with issues.
Having a strong single card is always preferrable in terms of performance and avoiding issues.

Additionally, Crossfire and SLI both suffer from micro-lag, CF more than SLI.

[Aliquis Freedom & Ethnopluralism]

DX12 got its own support.

Then again with mining craze and prices getting an Nvidia card instead doesn't seem like all that bad of a suggestion.

... or play and mine until you can get a GTX 2080 or whatever ...