RX580 CrossFire not working

radeon_rx480

Commendable
Dec 13, 2016
8
0
1,510
I am trying to use CrossFire and my second Radeon RX 580 is not recognized by my motherboard (AsRock X470 Master SLI/AC.) Both cards are MSI Radeon RX 580s, and the CPU is the Ryzen 5 2400G. I currently have 16GB of Kingston HyperX Fury DDR4-3466 installed. I am using a 750W EVGA 750 G2 PSU. Both cards work fine in the top slot but I cannot get the motherboard to recognize either card in the bottom slot. Even if I use the card in the bottom slot and I remove the one in the top slot, I will not get any video output from the second card regardless of which one it is.
 

radeon_rx480

Commendable
Dec 13, 2016
8
0
1,510
That's what I'm saying, the second GPU isn't recognized by the motherboard. I can't enable it in the AMD settings for this reason. I have tried installing one graphics card and putting it in the second slot. I will get no video output from the slot but it works fine in the first slot. I'm not sure if the second slot is dead or something but I hope not.
 

radeon_rx480

Commendable
Dec 13, 2016
8
0
1,510


Hmmm. Any idea what else it could be?
 

WildCard999

Titan
Moderator


Considering you've tried the second slot with no video that's what I'd suspect, sorry it's kind of crappy as you'll need to RMA the board.
 

radeon_rx480

Commendable
Dec 13, 2016
8
0
1,510


Hmmm, the fan does come on, is that any possibility that it's not the slot?
 

WildCard999

Titan
Moderator


It doesn't take much to run the fan, contact Asrock (link above) before RMA.