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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 169

post #1681 of 38701
i have a question, do the ASUS reference cards come voltage unlocked? or do they have to be flashed with the asus oc test bios?
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post #1682 of 38701
Quote:
Originally Posted by Evil Penguin View Post

Here's an interesting little something AMD's Dave Baumann said:

Actually, it does the opposite! We scale the voltage based on leakage, so the higher leakage parts use lower voltage and the lower leakage parts use a higher voltage - what this is does narrow the entire TDP range of the product.

Everything is qualified at worst case anyway; all the TDP calcs and the fan settings are completed on the worst case for the product range.



So... The lower percent the better or the lower the leakage, the higher the percentage?

edit: This sounds alot like Bulldozer.

With Bulldozer, higher stock voltage = a better part generally (lower leakage). This is due to high leakage parts creating additional heat meaning the voltage drop keeps them in spec heat wise.

What have you uncovered here :O
Edited by Tslm - 1/23/12 at 8:15am
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post #1683 of 38701
Thread Starter 
Lower leakage is generally better (requires less power).
It seems that on purpose AMD increases the voltage on lower leakage chips in order to keep a consistent TDP on all 7970s.
So high leakage chips are set with lower voltage because they consume more power.
So my card that is set at 1174mV could actually be under-volted and consume less power than say an 1125mV card.

Here's the info that Unwinder posted:
up to 2F90 (up to 75% quality) - 1.1750V
up to 34D0 (up to 80% quality) - 1.1125V
up to 3820 (up to 85% quality) - 1.0500V
up to 3A90 (up to 90% quality) - 1.0250V


Does this mean that the lower the percentage, the better?
Edited by Evil Penguin - 1/23/12 at 8:25am
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post #1684 of 38701
I rann 100x Crysis2 Adrenaline Bench overnight, temps topped out at 77c due to my need to sleep in the same room as this jet plane we call a video card. I saw a few people saying the Crysis games were a good indication for stability, but my question is: when it was unstable did it crash? Or just artifact? As I left it unsupervised. All passed as far as i can see, frame rates were consistent during every run.

I guess that is a pass at 1200mhz 1.225v, it still artifacts in GPUtool but then again I'm not playing GPUtool...
    
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post #1685 of 38701
Thread Starter 
I would never use games as a way to test out a card's stability (strictly).
To me an artifact is an error and I can't stand errors.
So I programs like OCCT to stress test and check for errors.

Just saying... redface.gif
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post #1686 of 38701
Quote:
Originally Posted by Evil Penguin View Post

To the club in general:
I have also updated some of your ASIC quality scores if you don't mind.
If I missed some of your scores (I skim through the pages at times) and want me to update it, send me a PM if you wish or simply make another post here stating you want an update.

my asic is 85.6% & im at 1000/1400, my voltage is 1050mv
post #1687 of 38701
Quote:
Originally Posted by Evil Penguin View Post

Quote:
Lower leakage is generally better (requires less power).
It seems that on purpose AMD increases the voltage on lower leakage chips in order to keep a consistent TDP on all 7970s.
So high leakage chips are set with lower voltage because they consume more power.
So my card that is set at 1174mV could actually be under-volted and consume less power than say an 1125mV card.
Here's the info that Unwinder posted:
up to 2F90 (up to 75% quality) - 1.1750V
up to 34D0 (up to 80% quality) - 1.1125V
up to 3820 (up to 85% quality) - 1.0500V
up to 3A90 (up to 90% quality) - 1.0250V

Does this mean that the lower the percentage, the better?

Can't be, ive tested 6 cards, and the ones that were shining were the higher % numbers. Hence the term ASIC quality, youd think that higher is better, it always has been in mathematics.

Quote:
Originally Posted by dajez View Post

my asic is 85.6% & im at 1000/1400, my voltage is 1050mv

Is that your highest overclock?
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post #1688 of 38701
Quote:
Originally Posted by Denim-187 View Post

Can't be, ive tested 6 cards, and the ones that were shining were the higher % numbers. Hence the term ASIC quality, youd think that higher is better, it always has been in mathematics.
Is that your highest overclock?

nop thats just my clocks atm
post #1689 of 38701
Quote:
Originally Posted by dajez View Post

nop thats just my clocks atm

Well judging by your ASIC quality, i'd say it will hit 1300+mhz. Lets hope for your sake i am not mistaken.
And lets hope you prove me right very soon thumb.gif
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post #1690 of 38701
Thread Starter 
Quote:
Originally Posted by Denim-187 View Post

Can't be, ive tested 6 cards, and the ones that were shining were the higher % numbers. Hence the term ASIC quality, youd think that higher is better, it always has been in mathematics.
One would think... But lower leakage is better I believe.
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