- Sep 13, 2008
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Some of you may know this already, but I will post it here for those interested that it may help you. I found this out just now.
By default, it is not possible to underclock some AMD cards in software, whether it is with MSI afterburner, sapphire trixx, crimson software, or other OC software. This may be desirable if a card is overheating or unstable at stock clocks, or one wants to save power (for mining for instance), or a combo of the above.
With software, one can apply/set lower clocks, but they will not actually work for the 3d performance clock, it will still run at stock for the card. You can test with GPUz, the clocks for the cards will say it is lower, but then going to the monitoring tab with a game or 3d app or compute software running, you will see it is actually running at stock, and not underclocked.
There is a fairly simple fix for this, and it is not needed to alter the default clocks of a card in a bios flash. It can be done in MSI afterburner, one must enable unofficial overclocking mode, I would recommend setting it to 'with power play'. Reboot, and you can now underclock. I tested this on my 290s on windows 10, the hardware monitor in GPUz reported under clocked properly while mining ethereum.
I hope this helps someone, the reason I wanted to do this was because I would get occasional game crashes or driver/game hangs in BF4; I think one of my cards (probably the secondary) is a bit unstable.
By default, it is not possible to underclock some AMD cards in software, whether it is with MSI afterburner, sapphire trixx, crimson software, or other OC software. This may be desirable if a card is overheating or unstable at stock clocks, or one wants to save power (for mining for instance), or a combo of the above.
With software, one can apply/set lower clocks, but they will not actually work for the 3d performance clock, it will still run at stock for the card. You can test with GPUz, the clocks for the cards will say it is lower, but then going to the monitoring tab with a game or 3d app or compute software running, you will see it is actually running at stock, and not underclocked.
There is a fairly simple fix for this, and it is not needed to alter the default clocks of a card in a bios flash. It can be done in MSI afterburner, one must enable unofficial overclocking mode, I would recommend setting it to 'with power play'. Reboot, and you can now underclock. I tested this on my 290s on windows 10, the hardware monitor in GPUz reported under clocked properly while mining ethereum.
I hope this helps someone, the reason I wanted to do this was because I would get occasional game crashes or driver/game hangs in BF4; I think one of my cards (probably the secondary) is a bit unstable.
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