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Crossfire does not seem to work

SuperStroopwafel
By SuperStroopwafel
in Graphics Cards
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Hey everyone,

 

I just got my R9 280 and I want to crossfire it with my 7950. But is does not seem to benefit. I ran Heaven Benchmark with one card. 924 points. And then with 2 1000 points. 

It is enabled in Catalyst. 

Does anyone have some tips? 

Thanks!

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https://linustechtips.com/topic/252977-crossfire-does-not-seem-to-work/
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What mobo are you using? and what is your CPU?

Specs: CPU - Intel i7 8700K @ 5GHz | GPU - Gigabyte GTX 970 G1 Gaming | Motherboard - ASUS Strix Z370-G WIFI AC | RAM - XPG Gammix DDR4-3000MHz 32GB (2x16GB) | Main Drive - Samsung 850 Evo 500GB M.2 | Other Drives - 7TB/3 Drives | CPU Cooler - Corsair H100i Pro | Case - Fractal Design Define C Mini TG | Power Supply - EVGA G3 850W

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Strange, it should work as a 280x is just a rebranded 7950...

 

Have you checked your drivers?

Specs: CPU - Intel i7 8700K @ 5GHz | GPU - Gigabyte GTX 970 G1 Gaming | Motherboard - ASUS Strix Z370-G WIFI AC | RAM - XPG Gammix DDR4-3000MHz 32GB (2x16GB) | Main Drive - Samsung 850 Evo 500GB M.2 | Other Drives - 7TB/3 Drives | CPU Cooler - Corsair H100i Pro | Case - Fractal Design Define C Mini TG | Power Supply - EVGA G3 850W

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What drivers what are your specs

Please follow your topics guys, it's very important! CoC F.A.Q  Please use the corresponding PC part picker link for your country USA, UK, Canada, Australia, Spain, Italy, New Zealand and Germany

also if you find anyone with this handle in games its most likely me so say hi

 

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Strange, it should work as a 280x is just a rebranded 7950...

 

Have you checked your drivers?

kinda its a 7970 ghz the 280 is the 7950

Please follow your topics guys, it's very important! CoC F.A.Q  Please use the corresponding PC part picker link for your country USA, UK, Canada, Australia, Spain, Italy, New Zealand and Germany

also if you find anyone with this handle in games its most likely me so say hi

 

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I would argue that it's the fault of the differing BIOS. Now I understand that differences in the BIOSes shouldn't account for anything too much usually(I had 560 Ti's that had differing BIOSes but ran fine in SLI). However, they ARE recognized as two different cards. In addition, if I remember correctly, only under specific conditions would CrossFire work with those two cards. You may have to flash the 7950 as a 280 or the 280 as a 7950.

"It pays to keep an open mind, but not so open your brain falls out." - Carl Sagan.

"I can explain it to you, but I can't understand it for you" - Edward I. Koch

"I didn't die! I performed a tactical reset!" - Apollolol

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