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How do I overclock CF 7900 series cards that have different mem clock speeds?

post #1 of 2
Thread Starter 
Basically, what I have done is purchased a 7970 and CF it with my 7950, but my 7950 mem will not go past 1250 without crashing, so do I need to downclock my 7970 mem to 1250 as well or disable "synchronize cards" in sapphire trixx? I'm assuming I need to disable synchronize cards in sapphire trixx options?
    
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i7-7820HK Kaby Lake @ 4.2Ghz GTX 1070 @ 2Ghz boost @ 9008Mhz Vram 16GB 2x8 DDR4 2133 Samsung 960 EVO 500GB NVMe 
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5TB Seagate 2.5" 5400RPM Grizzly Conductonaut on GPU and CPU Win 10 Bloatware Free Edition 17.3" 1080p IPS oc'd 100hz GSYNC 
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CPUGraphicsRAMHard Drive
i7-7820HK Kaby Lake @ 4.2Ghz GTX 1070 @ 2Ghz boost @ 9008Mhz Vram 16GB 2x8 DDR4 2133 Samsung 960 EVO 500GB NVMe 
Hard DriveCoolingOSMonitor
5TB Seagate 2.5" 5400RPM Grizzly Conductonaut on GPU and CPU Win 10 Bloatware Free Edition 17.3" 1080p IPS oc'd 100hz GSYNC 
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post #2 of 2
Thread Starter 
just installed 12.8 drivers... this is what I got http://www.3dmark.com/3dm/1021399?

it shows both my cards as 7970 and at 1000/1450 did ccc do this automatically or is it just an error my 3dmark reporting?

i can't get a stable OC either, my 7950 used to be stable at 1200 core before addinga second card, i left the 7970 at default and put my 7950 at 1200 core like before and it crashes everytime... :/
    
CPUGraphicsRAMHard Drive
i7-7820HK Kaby Lake @ 4.2Ghz GTX 1070 @ 2Ghz boost @ 9008Mhz Vram 16GB 2x8 DDR4 2133 Samsung 960 EVO 500GB NVMe 
Hard DriveCoolingOSMonitor
5TB Seagate 2.5" 5400RPM Grizzly Conductonaut on GPU and CPU Win 10 Bloatware Free Edition 17.3" 1080p IPS oc'd 100hz GSYNC 
  hide details  
Reply
    
CPUGraphicsRAMHard Drive
i7-7820HK Kaby Lake @ 4.2Ghz GTX 1070 @ 2Ghz boost @ 9008Mhz Vram 16GB 2x8 DDR4 2133 Samsung 960 EVO 500GB NVMe 
Hard DriveCoolingOSMonitor
5TB Seagate 2.5" 5400RPM Grizzly Conductonaut on GPU and CPU Win 10 Bloatware Free Edition 17.3" 1080p IPS oc'd 100hz GSYNC 
  hide details  
Reply
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