Question Can't CrossFire RX580-570

[Karim1949]

Why Can't CrossFire RX580-570
No Crossfire On/Off AMD Radeon settings

Thank

 

[Rogue Leader]

Because for crossfire to work you need 2 of the same GPU. Either 2 580's or 2 570's.

 

[mgallo848]

Crossfire RX580 + RX580 = Yes
Crossfire RX570 + RX570 = Yes
Crossfire RX580 + RX570 = No

 

[Karim1949]

Crossfire RX580 + RX580 = Yes
Crossfire RX570 + RX570 = Yes
Crossfire RX580 + RX570 = No

sure ? but same Polaris Architecture
Crossfire Not Sli

 

[TJ Hooker]

What motherboard? What slots are the cards in?

AFAIK you should be able to crossfire any two cards that share the same GPU, at least that's how it used to be. If that's still the case, a 570 and 580 should work.

Edit: Apparently still worked as of 1st gen polaris cards:

RX 480 and RX 470 Crossfire?

We found out that not only does the RX 480 and RX 470 play nice together in Crossfire, but we show you how well.

wccftech.com

 

[mgallo848]

sure ? but same Polaris Architecture
Crossfire Not Sli

It doesn't matter that they are both Polaris, it's not possible.

It MIGHT be possible to crossfire an RX480 + RX580 or,
maybe a RX470 + RX570

FYI: SLI is Nvidia only.

 

[bignastyid]

AMD has changed their requirements with the newer cards. They use to allow crossfire accross different models with the same architecture but have changed that, Now(like SLI) they need to be the same model.
https://www.amd.com/en/support/kb/faq/dh-018#faq-AMD-CrossFire™-Requirements

 

[Rogue Leader]

sure ? but same Polaris Architecture
Crossfire Not Sli

AMD in current drivers requires them to be the same. Even if it did work the 580 would be downgraded to 570 levels, and from what I have read crossfired 570's are pretty awful, and crossfire is awful in general.

 

[Karim1949]

What motherboard? What slots are the cards in?

AFAIK you should be able to crossfire any two cards that share the same GPU, at least that's how it used to be. If that's still the case, a 570 and 580 should work.

I'm use old motherboard asus rampage iii extreme are slots Use different slots Pcie16X1 Riser - pcie 16X8

Thank

 

[TJ Hooker]

I'm use old motherboard asus rampage iii extreme are slots Use different slots Pcie16X1 Riser - pcie 16X8

Thank

If I understand correctly you're using a x1 to x16 riser? Crossfire requires at least x4 for each graphics card. I don't understand why you're using a riser though when that board has 8 PCIe slots with four of them being x16.

 

[Rogue Leader]

If I understand correctly you're using a x1 to x16 riser? Crossfire requires at least x4 for each graphics card. I don't understand why you're using a riser though when that board has 8 PCIe slots with four of them being x16.

This!

Even if it was going to work, it won't work with an X1 slot.

 

[Karim1949]

This!

Even if it was going to work, it won't work with an X1 slot.

Whoooo is work after change riser to slot thank u so much TJ Hooker

 

[mgallo848]

I've looked all over the internet for the past 30 minutes looking for anything or anyone that says yes it works. I only found 1 person that claims to have done it but said it was a "complete stuttery mess"

I would be interested in seeing a before and after benchmark of either Heaven benchmark or 3D Mark confirming this actually works.

Thanks,

 

[Karim1949]

 

[Rogue Leader]

Interesting, this was supposed to be blocked but I guess not.

 

[mgallo848]

Thank you for the pics. Would you be able to run a benchmark and show the score with crossfire on then off?

This would help with others here in the future.

Either one of these would work:
https://benchmark.unigine.com/heaven
or
https://benchmarks.ul.com/3dmark

 

[Karim1949]

Benchmarks

with running app record behind drop little

 

[mgallo848]

Thanks for the numbers. I have a RX580 in one of my PC's at home. This gives me something to compare it to.

Good luck