[SOLVED] How do you set up a crossfire setup ?

Feb 14, 2019
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Firstly, I wouldnt bother as its better to buy a single card thats more powerful than dual cards (many issues with dual card setups).

If you do go through with it, you need a motherboard that supports crossfire, and two cards with the same gpu and vram. Then you can enable crossfire in the amd radeon settings.
https://www.amd.com/en/support/kb/faq/dh-018
thank you sir , i already bought 4 cards , but the mobo does not seem to accomodate no more than 2 . i'm not sure . they are sapphire nitro plus 570 . can you help me setting up my crossfire ?
 
Feb 14, 2019
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Wait, why would you want to run 4 rx570 cards in crossfire? I dont think thats a supported configuration for crossfire...
yes i think i made a HUGE mistake , is there a 3 way crossfire set up ? cause otherwise i have to use the rest on my other build

anyhow when i launch call of duty in the Graphics there is no crossfire and the vram is only 8 gb . with dx 12 it is supposed to be 16 ? HELP
 

Wolfshadw

Titan
Moderator
If this is your motherboard: ASUS ROG ZENITH EXTREME, then according to the user's manual - pg 1-8, it supports quad-crossfire. There is also a note that if the U.2 port is in use, the last PCI-Ex8 slot is disabled. With the four cards installed (and power to each), it should just be a matter of setting it up in the Radeon Settings page as RobCrezz suggests/linked.

-Wolf sends

Edit: I would also note that:
  1. The game actually needs to support Crossfire.
  2. VRAM stacking in DX12 is entirely up to the development team.
Obviously, if they didn't implement Crossfire, then didn't implement VRAM stacking either.

Which Call of Duty game are you concerned about?
 
Last edited:
Feb 14, 2019
80
6
135
0
If this is your motherboard: ASUS ROG ZENITH EXTREME, then according to the user's manual - pg 1-8, it supports quad-crossfire. There is also a note that if the U.2 port is in use, the last PCI-Ex8 slot is disabled. With the four cards installed (and power to each), it should just be a matter of setting it up in the Radeon Settings page as RobCrezz suggests/linked.

-Wolf sends

Edit: I would also note that:
  1. The game actually needs to support Crossfire.
  2. VRAM stacking in DX12 is entirely up to the development team.
Obviously, if they didn't implement Crossfire, then didn't implement VRAM stacking either.

Which Call of Duty game are you concerned about?
call of duty world war 2 , also to a lesser extent black ops 4
 
Feb 14, 2019
80
6
135
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If this is your motherboard: ASUS ROG ZENITH EXTREME, then according to the user's manual - pg 1-8, it supports quad-crossfire. There is also a note that if the U.2 port is in use, the last PCI-Ex8 slot is disabled. With the four cards installed (and power to each), it should just be a matter of setting it up in the Radeon Settings page as RobCrezz suggests/linked.

-Wolf sends

Edit: I would also note that:
  1. The game actually needs to support Crossfire.
  2. VRAM stacking in DX12 is entirely up to the development team.
Obviously, if they didn't implement Crossfire, then didn't implement VRAM stacking either.

Which Call of Duty game are you concerned about?
but the question remains wolf , why is in the bios the two cards both at pci e 3 x 16 while in windows in amd crimson , it shows one card at pci e 2 x4 ? thanks for your previous answer though
 

Wolfshadw

Titan
Moderator
but the question remains wolf , why is in the bios the two cards both at pci e 3 x 16 while in windows in amd crimson , it shows one card at pci e 2 x4 ? thanks for your previous answer though
If your cards are installed in PCIEX16_1 and PCIEX16_3, per the User's manual pg 1-2, then I suspect the issue is with Windows/Crimson reporting it incorrectly.

-Wolf sends
 
I seem to remember COD WWII has poor crossfire scaling across 2 cards. Across 3 I don’t know but I wouldn’t be surprised if it’s worse than 2 cards or at least no better. Cut your losses, forget crossfire and sell the cards and get a single high performance card.
 
Reactions: RobCrezz
Feb 14, 2019
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This be my crossfire x , in case you're wondering if i'm asking a serious question :



i installed a third card now it's pcie 3 x 16 , pcie 3 x4 and pcie 2 x4 . it's strange
 

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