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Old 12-08-2017
majkel majkel is offline
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Default 7970 slowin down after OC

Hey guys, I had this silly problem with 7970 overclocking (have my hands on this card for first time from couple of years now). I got proper GPUPi times when not touching clocks (at default), but as soon as I touch clocks in afterburner (even at 1mhz) the card starts to be like ~ 50% slower.
I does not matter if I am downclocking or overclocking.
I tried different drivers, tried diabling ULPS and I'm nowhere closer to resolution.

Maybe someone had similar problem?
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Old 12-11-2017
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yosarianilives yosarianilives is offline
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Default Re: 7970 slowin down after OC

The newer drivers don't work with AB. If you try to change anything it will lock to 500 mhz. You can verify this with the sensor tab in gpu-z. The solution is use saphire trixx 4.9.1, works for me plus you can hex edit it to allow more vcore.
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Old 12-11-2017
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Default Re: 7970 slowin down after OC

Quote:
Originally Posted by yosarianilives View Post
The newer drivers don't work with AB. If you try to change anything it will lock to 500 mhz. You can verify this with the sensor tab in gpu-z. The solution is use saphire trixx 4.9.1, works for me plus you can hex edit it to allow more vcore.
what he said

or you can use overdrive but no voltage support there
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Old 12-12-2017
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Default Re: 7970 slowin down after OC

You can also try VRMTool/WattTool, not remember which vrm controller the 7970 had, maybe the tool is able to read the controller register via I2C/PMbus to mod the voltage.
Then use Wattman for the clocks, any 3rd party tool installed will only bother the driver.
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Last edited by Wimpzilla; 12-12-2017 at 00:51.
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Old 4 Weeks Ago
majkel majkel is offline
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Default Re: 7970 slowin down after OC

Thanks, Trixx worked like charm.
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Old 3 Days Ago
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Default Re: 7970 slowin down after OC

All my AMD cards do the same, use Catalyst 16 drivers.
My cards do seem faster on the newer drivers if not overclocking though.
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