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Slave card fans not showing up in Crimson, and not spinning at all at idle or under load, help!

Question asked by mrnott on Aug 18, 2016
Latest reply on Sep 5, 2016 by mrnott

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Hi community,

I recently decided to upgrade my PC to crossfire, with 2 x Sapphire R9 390X Nitro cards. But the slave card in slot 2 will not show any sign of fans on the crimson software, or in my corsair link. They're just not there, and aren't working at idle or load. My power supply is a 1000w Corsair platinum HX1000i, and my motherboard is the Asus Maximus VI Extreme. Sometimes the fans will show up after a system reboot, but I have rebooted twice this time round and they still aren't there. Is this a graphics card issue, or something else. Please help

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amdmatt

Aug 20, 2016 1:59 PM

This is expected behaviour. GPU2 is sleeping, literally. This video will explain Zerocore/ULPS technology.

AMD ZeroCore Power: How to Make my PC More Energy Efficient - YouTube

AMD's ZeroCore Power Technology Explained - YouTube

Note! Whilst ULPS is enabled GPU monitoring, such as fan speed, usage etc via third party tools may be unavailable. To workaround this you would need to disable Zerocore/ULPS using third party tools.

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mrnott @ amdmatt on Sep 5, 2016 3:05 AM

Thanks for your reply Matt!! I realized that by launching the monitoring software after playing a game to trigger the card into action, then the GPU would appear as normal. Just there was one instance where the card had defaulted to 25% manual fan setting via Radeon settings for some reason, and caused the GPU to reach 94°c, which led to this query, as I restarted the PC and they wouldn't appear... Rookie CorssfireX mistake

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kingfish Aug 20, 2016 1:55 PM

ULPS: How to disable

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mrnott @ kingfish on Sep 5, 2016 3:06 AM

Awesome, thanks dude

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amdmatt Aug 20, 2016 1:59 PM
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This is expected behaviour. GPU2 is sleeping, literally. This video will explain Zerocore/ULPS technology.
AMD ZeroCore Power: How to Make my PC More Energy Efficient - YouTube
AMD's ZeroCore Power Technology Explained - YouTube

Note! Whilst ULPS is enabled GPU monitoring, such as fan speed, usage etc via third party tools may be unavailable. To workaround this you would need to disable Zerocore/ULPS using third party tools.
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- mrnott @ amdmatt on Sep 5, 2016 3:05 AM
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  Thanks for your reply Matt!! I realized that by launching the monitoring software after playing a game to trigger the card into action, then the GPU would appear as normal. Just there was one instance where the card had defaulted to 25% manual fan setting via Radeon settings for some reason, and caused the GPU to reach 94°c, which led to this query, as I restarted the PC and they wouldn't appear... Rookie CorssfireX mistake
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kingfish Aug 20, 2016 1:55 PM
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ULPS: How to disable
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- mrnott @ kingfish on Sep 5, 2016 3:06 AM
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  Awesome, thanks dude
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Slave card fans not showing up in Crimson, and not spinning at all at idle or under load, help!

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