Need help to connect 2 x sapphire radeon R9 290 4GB

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Robert_362

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Feb 10, 2017
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Hi all

My psu is 1200 W. When i will connect both of cards psu doesn't turn on computer. Both 6 and 8 pin is connected on both of cards. I don't understand what problem is. When I disconnect the second card so it works again.

Could it be because of one card needs 700 W PSU so two need 1400 W ? But its crazy 1400W for 2 x GPU ??

Regards
 
Solution
LucaFire
See if you can manually activate CrossFire in Crimson (http://support.amd.com/en-us/kb-articles/Pages/How-to-Configure-AMD-CrossFire-Using-AMD-Radeon-Settings.aspx). Of course, have both cards plugged into motherboard but only one connected to the power.

The CrossFire button might be greyed out, though. So - just tell me what happens.
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antoine21839

antoine21839

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Jan 4, 2017
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Did you forget the CrossFire ribbon ?
 
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LucaFire

LucaFire

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I'm just adding this here - the computer should start up either way, even without the CrossFireX ribbon.
Anyways, the wattage that the mentioned in the first post is the RECOMMENDED wattage of the PSU for your computer. No GPU takes up 700W of power.
 
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Robert_362

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Feb 10, 2017
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thx anyway.
 
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Robert_362

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Feb 10, 2017
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My motherboard is ( Asus Crosshair V Formula-Z ) and its support more than one GPU.

 
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maxalge

maxalge

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May 31, 2012
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disconnect the first card, put in the second card by itself

does it work?
 
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Robert_362

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Feb 10, 2017
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yes it works. Look situation is following. Frst card is connected 6 pin and 8pin and work great. When i connecting second card its work to i mean fan is spins. But when i stop in 6 + 8 pin PC will not start after. Cards separately workings great.

sorry for my English.
 
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maxalge

maxalge

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what model psu do you have exactly?
 
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Robert_362

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Feb 10, 2017
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Corsair AX1200i 1200W
 
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maxalge

maxalge

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more than enough


updated bios to newest from manufacturer's website?

 
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Robert_362

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Feb 10, 2017
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BIOS information on motherboard show that bios have alredy last updates
 
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LucaFire

LucaFire

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See if you can manually activate CrossFire in Crimson (http://support.amd.com/en-us/kb-articles/Pages/How-to-Configure-AMD-CrossFire-Using-AMD-Radeon-Settings.aspx). Of course, have both cards plugged into motherboard but only one connected to the power.

The CrossFire button might be greyed out, though. So - just tell me what happens.
 
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