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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 168

post #1671 of 38701
Quote:
Originally Posted by PARTON View Post

Sorry, try again. My card is 23b = 571; 571/1023 = .558
Close, though.

You have to divide whole 4-character hexadecimal number by 16384
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post #1672 of 38701
Quote:
Originally Posted by trippinonprozac View Post

I dont want to hear anyone whinge about their ASIC quality anymore... I officially set the record for the worst card ever to be released! haha
338
Quote:
Originally Posted by Denim-187 View Post

your card is 55.8 % ? Dudeeeeee

I'm at 1160 on stock volts with ek en+acetal. 1075 max on air with stock fan.

And somewhere someone sits with a 7970 good for1300 under water and is afraid to oc it.
    
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post #1673 of 38701
Thread Starter 
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.
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post #1674 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.

Mine are 78.3% and 81.4% @ 1250/1700mhz so far
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post #1675 of 38701
Thread Starter 
Quote:
Originally Posted by Denim-187 View Post

Mine are 78.3% and 81.4% @ 1250/1700mhz so far
Updated. thumb.gif
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post #1676 of 38701
I got a 1174mv card. Trying to get it to 1200mhz core, but it is pretty unstable. (games crash, driver stops working) So I wonder, will raising the volt help me reach higher clocks?
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post #1677 of 38701
Thread Starter 
Quote:
Originally Posted by Exburn View Post

I got a 1174mv card. Trying to get it to 1200mhz core, but it is pretty unstable. (games crash, driver stops working) So I wonder, will raising the volt help me reach higher clocks?
It could help stabilize your card, but I wouldn't expect it to be stress test stable.
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post #1678 of 38701
Quote:
Originally Posted by Exburn View Post

I got a 1174mv card. Trying to get it to 1200mhz core, but it is pretty unstable. (games crash, driver stops working) So I wonder, will raising the volt help me reach higher clocks?

Make sure CCC overdrive is disabled.
This is a major set back in overclocking these cards...or any cards in that matter.
Reset to defaults in CCC and uncheck the Enable box if you have already enabled it.
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post #1679 of 38701
Thread Starter 
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?
Edited by Evil Penguin - 1/23/12 at 6:51am
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post #1680 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?

The lower the leakage percent, the higher the voltage. The higher the leakage, the better. Correct me if im wrong.

Quote:
Leakage Power Trends

Development of the digital integrated circuits is challenged by higher power consumption. The combination of higher clock speeds, greater functional integration, and smaller process geometries has contributed to significant growth in power density. At 90 nm and below, leakage power management is essential in the ASIC design process. As voltages scale downward with the geometries threshold voltages must also decrease to gain the performance advantages of the new technology but leakage current increases exponentially. Thinner gate oxides have led to an increase in gate leakage current.

Scaling improves transistor density and functionality on a chip. Scaling helps to increase speed and frequency of operation and hence higher performance. At the same time power dissipation increases. To counteract increase in active and leakage power Vth should also be scaled. Leakage power is catching up with the dynamic power in VDSM CMOS circuits as shown in Figure 1.

204

Edited by Denim-187 - 1/23/12 at 7:56am
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