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RX 480 Performing Better by Undervolting

Starelementpoke
By Starelementpoke
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Posted

No clue if someone made a thread for this, but probably a good idea making this easier to find rather than buried under 30+ pages of thread posts.

https://www.reddit.com/r/Amd/comments/4qupw4/super_psa_all_rx480_owners_please_attempt_to/

Apparently, people have been trying to undervolt the 480 a bit, with the card doing better after the fact.

There are more screenshots than the ones I listed, find the rest of the Reddit thread. Take with a grain of salt, you can pass a Firestrike test without the card being stable in game.

Screenshots:

f9810bc91e.jpg

Uwtr3UU.pngk7cyxZr.png

The link to the Firestrike test above: http://www.3dmark.com/fs/9074879

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Posted

Makes sense, it's limited mostly by power, so if higher power states use less power, it will spend more time in those higher performance states.

 

Also this :

 

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I'm not sure it's news worthy but that card is overvolted.

When you increase the power target and drop the voltage, it uses 33W less power than increased power target at default voltage. That should say it all. I mean 33W. That's ridiculous.

 

It also lowers temperatures overall and improves performance by giving it the extra headroom whether or not you increase the power target.

 

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Posted

Can't open reddit. 

How much did they reduce? 100mV? 75? 50?

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2 minutes ago, gilang01 said:

Can't open reddit. 

How much did they reduce? 100mV? 75? 50?

Apparently, OP is asking to turn it down to no lower than 1.100v.

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2 minutes ago, Starelementpoke said:

Apparently, OP is asking to turn it down to no lower than 1.100v.

I read it the other way, 1.1V or lower.

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1 minute ago, Megahurt said:

I read it the other way, 1.1V or lower.

Eh, probably something like that. Bit early for me.

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12 minutes ago, gilang01 said:

Can't open reddit. 

How much did they reduce? 100mV? 75? 50?

Depends on the card but I believe someone's card used 1.3V 1.150V (don't know where I got 1.3V from, my mistake) by default and he dropped it to 1.075V stable.

Also someone reporting running 1325 MHz at 1.09V. Some suggest being able to do stock at 1V but haven't seen anyone do it.

Remember it's all a chip lottery.

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This only applies to some cards. Background: voltage tolerance for all RX 480s was increased for higher yields, so more cards could become suitable as an RX 480.

 

The cards that were gonna be RX 480s anyway use less power and can boost higher since they're not close to the power limit with unnecessarily high voltage.

'Fanboyism is stupid' - someone on this forum.

Be nice to each other boys and girls. And don't cheap out on a power supply.

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8 minutes ago, Trixanity said:

Depends on the card but I believe someone's card used 1.3V by default and he dropped it to 1.075V stable.

Also someone reporting running 1325 MHz at 1.09V. Some suggest being able to do stock at 1V but haven't seen anyone do it.

Remember it's all a chip lottery.

1.3V?

 

I know that architectures change, but that's the voltage ceiling on my 7950 (Base voltage being 1050 mV).

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4 minutes ago, Fetzie said:

1.3V?

 

I know that architectures change, but that's the voltage ceiling on my 7950 (Base voltage being 1050 mV).

Read my correction. Don't know how long it took to type that because I corrected that more than five minutes ago :)

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8 minutes ago, Trixanity said:

Read my correction. Don't know how long it took to type that because I corrected that more than five minutes ago :)

I'm on my iPad and taking my time typing :)

 

I'm guessing that I opened the thread while you were editing your post.

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7 hours ago, Starelementpoke said:

No clue if someone made a thread for this, but probably a good idea making this easier to find rather than buried under 30+ pages of thread posts.

https://www.reddit.com/r/Amd/comments/4qupw4/super_psa_all_rx480_owners_please_attempt_to/

Apparently, people have been trying to undervolt the 480 a bit, with the card doing better after the fact.

Care the edit the post with some more info and what results we are seeing?

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So 1.0 1.1 would be solid and go from there to clock?

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The recommended voltage for 16nm is .9V right? 

 

What is it for 14nm?

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4 hours ago, tsk said:

Care the edit the post with some more info and what results we are seeing?

Eh, I'll try to get a couple of screenshots of people's results tomorrow. 11PM here, so sleep is probably a high priority item.

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2 hours ago, Doobeedoo said:

So 1.0 1.1 would be solid and go from there to clock?

Start with 1.1, seems to be a voltage everyone can reach.

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1 hour ago, Deletist_Jerk said:

The recommended voltage for 16nm is .9V right? 

 

What is it for 14nm?

No clue. If you have a 480, try just starting with 1.1v.

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12 hours ago, Trixanity said:

Depends on the card but I believe someone's card used 1.3V 1.150V (don't know where I got 1.3V from, my mistake) by default and he dropped it to 1.075V stable.

Also someone reporting running 1325 MHz at 1.09V. Some suggest being able to do stock at 1V but haven't seen anyone do it.

Remember it's all a chip lottery.

From everyone's favorite WCCFTech, "Lastly we see a drop in maximum voltage delivered to the card, coming in now at .9875v vs the stock 1.0375v, and that’s the magic that made all of this happen."

Read more: http://wccftech.com/article/radeon-rx-480-reducing-voltage-increasing-efficiency/#ixzz4DJReoIVQ

 

They dropped 28w off the TDP, but I doubt all chips are that good so take the report with a grain (read, League player level) of salt.

Tip to those that are new on LTT forum- quote a post so that the person you are quoting gets a notification, otherwise they'll have no idea that you did. You can also use a tag such as @Ryoutarou97 (replace my username with anyone's. You should get a dropdown after you type the "@")to send a notification, but quoting is preferable.

 

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If you are a native speaker please use proper English if you can. Punctuation, capitalization, and spelling are as important to making your message readable as proper night theme formatting is.

 

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13 hours ago, Starelementpoke said:

No clue if someone made a thread for this, but probably a good idea making this easier to find rather than buried under 30+ pages of thread posts.

https://www.reddit.com/r/Amd/comments/4qupw4/super_psa_all_rx480_owners_please_attempt_to/

Apparently, people have been trying to undervolt the 480 a bit, with the card doing better after the fact.

i think the 3rd party cards will fix all that sh!t AMD made...

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Please join in the reddit thread. For anyone curious, 1.050v seems to be a good starting point for most people.

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4 hours ago, Tenelia said:

Please join in the reddit thread. For anyone curious, 1.050v seems to be a good starting point for most people.

Already am technically. Was essentially told to fuck off from asking why not have people post actual links to their Firestrike scores along with the screenshots, and asking if anyone would test the card by running it in an actual game for awhile.

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8 hours ago, i_build_nanosuits said:

i think the 3rd party cards will fix all that sh!t AMD made...

Eh, most likely. But if this ends up having some traction somehow, wouldn't be bad.

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