RX480 Crossfire not working

RasmusT

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Oct 31, 2015
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4,510
Hey!

So i recently upgraded to two RX480s, but i can't seem to get crossfire to work with the two. Seems like it's all just running on one card even though i enabled CF in the global settings and each game. And the tempature only changes on of the cards under load. One is at ca. 75c while the other is at 39c, heeeeeeeeeelp??

Complete build here: https://pcpartpicker.com/b/KCjcCJ
 
Alright, so, is crossfire enabled in your control center? that is the first thing you need to do.

Crossfire only works in fullscreen. So if the game you're trying to play is running in fixed window, crossfire won't work.

A real fast way to check if you're in crossfire is to plug your monitor into the bottom card. If you get an image - it isn't in crossfire. If no signal is detected, then you know you're in crossfire as the bottom card is a slave to the main.
 

RasmusT

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Oct 31, 2015
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4,510

Pretty much every game, even those who support crossfire fully. Rise of The Tomb Raider, GTA 5, DOOM, but Battlefield 4 decides to crash after i installed another RX480
 

RasmusT

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Oct 31, 2015
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4,510




It's the newest 16.7.2 Crimson, but i got the performance to boost. Never knew i had to run in fullscreen since i'm always playing in borderless windowed mode, thanks!