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270X clock speed fluctuating. - Page 2

post #11 of 27
Thread Starter 
Quote:
Originally Posted by dovaboy View Post

i think its that, i didnt see you mention anywhere that you have bumped your power target/control % it worked for me when i couldnt keep one of my cards fully clocked even on idle
.

I'd like to try bumping the voltage, but I'm not sure what a safe range is for a 270X.
post #12 of 27
Well since you're not overclocking try this:

Increase the power control % to max. Then increase the voltage by say...20mv. It's a small increase and won't effect it much but it might make it more stable.
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post #13 of 27
Thread Starter 
Quote:
Originally Posted by Masters View Post

Well since you're not overclocking try this:

Increase the power control % to max. Then increase the voltage by say...20mv. It's a small increase and won't effect it much but it might make it more stable.

Is the power control % separate from the voltage? Excuse my ignorance this is my first R9200 card, I just upgraded from a 5850.
I assumed the power control in Catalyst was the voltage, I've been using Sapphire Trixx which only has VDDC control.

In what way is the power control different from the voltage control? Should I have been raising both values?
post #14 of 27
It's related but not directly.

With AMD cards you can adjust the power control and the voltage. The power control allows the card to draw more power from the PSU than it normally could. Which makes it more stable in high end games.

So really it should always be maxed. There is a registry hack that actually allowed you to set this as high at 50%. But it is rarely needed (even though I use it).

If I understand it right, when a game tries to draw more power and the power control isnt maxed, it will throttle down because it's maxing out, then resume normally until it maxes out again. By increasing the amount of power it can draw, that max will be 20% higher.
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post #15 of 27
Thread Starter 
Quote:
Originally Posted by Masters View Post

It's related but not directly.

With AMD cards you can adjust the power control and the voltage. The power control allows the card to draw more power from the PSU than it normally could. Which makes it more stable in high end games.

So really it should always be maxed. There is a registry hack that actually allowed you to set this as high at 50%. But it is rarely needed (even though I use it).

If I understand it right, when a game tries to draw more power and the power control isnt maxed, it will throttle down because it's maxing out, then resume normally until it maxes out again. By increasing the amount of power it can draw, that max will be 20% higher.

So I assume that's a power saving feature? Interesting, perhaps all of my problems are related to not raising that value, is it safe to just knock it up to 40%, or like the voltage control, can setting it too high cause damage?
post #16 of 27
Quote:
Originally Posted by Dansrage View Post

So I assume that's a power saving feature? Interesting, perhaps all of my problems are related to not raising that value, is it safe to just knock it up to 40%, or like the voltage control, can setting it too high cause damage?
Nope, it won't cause any damage. Set it as high as you wish!
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post #17 of 27
Thread Starter 
Quote:
Originally Posted by sidewaykill View Post

Nope, it won't cause any damage. Set it as high as you wish!

Success! It's now completely stable, the power control was indeed what was causing the issue, so we can conclude that it was a power problem and that the card was throttling when too much power was being drawn from the PSU.
I switched to MSI Afterburner, for some reason Sapphire Trixx has no power control slider, and GPU-Z shows completely stable clock speeds.
Thanks guys.
post #18 of 27
Quote:
Originally Posted by sidewaykill View Post

Nope, it won't cause any damage. Set it as high as you wish!

This isn't exactly true. Setting it to 20% is fine, but not if you use the registry hack to set it all the way to 50%, that might cause problems.
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post #19 of 27
Quote:
Originally Posted by Masters View Post

This isn't exactly true. Setting it to 20% is fine, but not if you use the registry hack to set it all the way to 50%, that might cause problems.
No it won't, if you do it correctly.
My GTX 670s have 200% power with a modded BIOS.
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post #20 of 27
Quote:
Originally Posted by sidewaykill View Post


No it won't, if you do it correctly.
My GTX 670s have 200% power with a modded BIOS.

Oh well. either way the problem's solved.
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