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AMD Overdrive power control settings?

post #1 of 6
Thread Starter 
What do the power settings in AMD overdrive do? I'm currently clocking my 6950 setup in 6970 clocks and shaders and as far as I can tell, GPU-Z still reads the stock 880/1375 clocks with or without the +20% power. But if I feed more power, my cards just get 10 degrees hotter seemingly without improvement or added stability. Should I need to care about these settings?
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post #2 of 6
the power control is the controls for the cards OCP (over current protection), the percentage im pretty sure is the expected current draw + the taken percentage. so for example if the card draws 250W and you have the OCP at 20% your max power draw before OCP kicked in and throttled the card back would be 250+20%= 300W.

it is not a voltage control option and there for would not impact stability in the sense you are after, to do that you would need to get MSI Afterburner and use the core voltage control to increase the given core voltage. this would improve the stability of and overclocked gpu core as well as help stabilise the gpu with unlocked stream processors.

the only place the OCP power settings would come in place is if you found the card at 100% load was being throttled back and effecting performance. and yes, it will increase temps a fair bit as your giving more current for the VRM to run. you do need to be really careful with this as it will kill your card if you dont monitor the temps of the VRM
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post #3 of 6
You don't really have to worry about VRM temps anymore (damage to them).
They will automatically throttle down if it exceeds its specified temps.
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post #4 of 6
Quote:
Originally Posted by strikeblue View Post

What do the power settings in AMD overdrive do? I'm currently clocking my 6950 setup in 6970 clocks and shaders and as far as I can tell, GPU-Z still reads the stock 880/1375 clocks with or without the +20% power. But if I feed more power, my cards just get 10 degrees hotter seemingly without improvement or added stability. Should I need to care about these settings?


Yes, you should care about these settings. It basically let the card to draw more power from the TDP (Thermal Design Power). It will help performance without throttling the clocks and/or voltage down to maintain the power draw to stay within TDP set limit.

 

For some applications, you will notice more perfomance with PCS +20% as opposed to default 0% because the card is allowed to draw more power without throttling to perform the rendering.

 

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post #5 of 6
Thread Starter 
Both GPUs don't go over 70% load for any application with or without the +20% power (even bf3 which is the heaviest I've ever run so far) and I've got their voltages set at 1.175V. Temps go up to 90C maximum with the 20%, and around 80ish without. Of course, I'd like to keep the temps as low as possible without having to sacrifice performance. Does anyone have suggestions as to what I set the +power as? Perhaps I can just leave it at 0?
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post #6 of 6
Sorry to bring this old thread back to life but I really need some help with this setting on my Gigabye 7950. I have always had the power control to 20% (Thinking helps with OC). After a bit off reading online I put it down to 0% and now I can get a much better OC from 1050/1350 to 1150/1500. Before I would get BSOD and freezing etc but now with setting to 0% it seems to all work fine.

This has confussed me so much why it would work in this way??
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