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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1243

post #12421 of 38721
Quote:
Originally Posted by SacredChaos View Post

I have a couple questions regarding the overclocking of my MSI 7970. How do I know for sure the the -xcl tag is in affect in afterburner? I have added it restarted then removed it. Also what are the highest safe voltages for the Core and Memory? I believe i have a 1050mv card, what do you think my overclocks could reach? I seems if I go above 1150mhz core or 1550mhz memory I run into issues. I have a water cooling setup, just been to lazy to install it. So maybe if I can get this card cranked up it will convince me to tackle the water cooling.

Quote:
Originally Posted by SacredChaos View Post

Anyone wanna help me lol?

-xcl worked if you can adjust your voltages in Afterburner. If the voltage sliders work, then xcl worked. Highest safe voltages is whatever you can run while keeping your card cool. I'm running my voltages at 1.3/1.7 with no issues. I'm running a 1310/1725 OC.

High ASIC, low voltage cards (such as yours) typically perform better on air than they do on water. I believe there's still overvoltage circuitry at play that doesn't allow your processor to run at anything .125v above stock voltage. In this case, you're going to max out at 1.175 volts. Mine was a 1.174v card, so it maxes at 1.299 volts. Mine is also under water.
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post #12422 of 38721
Quote:
Originally Posted by DaClownie View Post

-xcl worked if you can adjust your voltages in Afterburner. If the voltage sliders work, then xcl worked. Highest safe voltages is whatever you can run while keeping your card cool. I'm running my voltages at 1.3/1.7 with no issues. I'm running a 1310/1725 OC.
High ASIC, low voltage cards (such as yours) typically perform better on air than they do on water. I believe there's still overvoltage circuitry at play that doesn't allow your processor to run at anything .125v above stock voltage. In this case, you're going to max out at 1.175 volts. Mine was a 1.174v card, so it maxes at 1.299 volts. Mine is also under water.

Thanks for the info. So basically setting the core voltage to 1.225 is doing absolutely nothing over 1.175? I assume the overvoltage control also affects memory voltage?
Edited by SacredChaos - 6/23/12 at 10:14pm
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post #12423 of 38721
Quote:
Originally Posted by SacredChaos View Post

Quote:
Originally Posted by DaClownie View Post

-xcl worked if you can adjust your voltages in Afterburner. If the voltage sliders work, then xcl worked. Highest safe voltages is whatever you can run while keeping your card cool. I'm running my voltages at 1.3/1.7 with no issues. I'm running a 1310/1725 OC.
High ASIC, low voltage cards (such as yours) typically perform better on air than they do on water. I believe there's still overvoltage circuitry at play that doesn't allow your processor to run at anything .125v above stock voltage. In this case, you're going to max out at 1.175 volts. Mine was a 1.174v card, so it maxes at 1.299 volts. Mine is also under water.

Thanks for the info. So basically setting the core voltage to 1.225 is doing absolutely nothing over 1.175? I assume the overvoltage control also affects memory voltage?

-xcl allows the voltage modification. However, the memory and core have seperate sliders for voltage. One doesn't adjust the other as far as I know.
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post #12424 of 38721
Quote:
Originally Posted by DaClownie View Post

-xcl allows the voltage modification. However, the memory and core have seperate sliders for voltage. One doesn't adjust the other as far as I know.

Yea, I know there are separate sliders. What I was meaning is there an over voltage limiter on the memory voltage also. Also, how does something perform better on air than water?
Edited by SacredChaos - 6/23/12 at 10:25pm
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post #12425 of 38721
Quote:
Originally Posted by SacredChaos View Post

Quote:
Originally Posted by DaClownie View Post

-xcl allows the voltage modification. However, the memory and core have seperate sliders for voltage. One doesn't adjust the other as far as I know.

Yea, I know there are separate sliders. What I was meaning is there an over voltage limiter on the memory voltage also. Also, how does something perform better on air than water?

Ah, sorry. Overvoltage doesn't exist for memory as far as I know, but if it did, the slider only allows from 1.6 to 1.7 volts. Even if it had the same .125 limit, you couldn't reach it anyway.

As to the overclocking capability... Chips that require more voltage at stock produce more heat (leakage) but also allow a higher overall voltage. Water cooling is able to keep these particular chips nice and cool, thus negating the leakage, and allowing for great overclocks.

My 7970 has a low ASIC (upper 60s if I remember correctly) and overclocks to 1310/1725. Temps don't go above 46C after 15 minutes of furmark. Gaming temps are 41C and below.
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post #12426 of 38721
Just as a test, I set my voltage to 1.3 in MSI Afterburner then launched GPU-Z and a game. Before I launched the game the VDDC was reading at 1.250 in GPU-Z and when the game started it was at 1.200. When I lower it to 1.250 in MSI Afterburner it drops to 1.200 in GPUZ without a game playing.
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post #12427 of 38721
Quote:
Originally Posted by SacredChaos View Post

Just as a test, I set my voltage to 1.3 in MSI Afterburner then launched GPU-Z and a game. Before I launched the game the VDDC was reading at 1.250 in GPU-Z and when the game started it was at 1.200. When I lower it to 1.250 in MSI Afterburner it drops to 1.200 in GPUZ without a game playing.

7970s do have pretty heavy vdroop, I haven't used a multimeter on one at normal voltage, but with the voltage cranked up to 1.56V on a reference card it was dropping to 1.46V under load.
    
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post #12428 of 38721

Just installed the 12.7 beta and no problems with MSI AB and extended clocks  (I didn't use -xcl), when I tried 12.6beta with MSI AB I was getting the screen flicker and jumping

 

This might help others

 

Un-installed MSI AB

 

Un-installed ATI driver using ATIman 7.0.2 (think there is a newer one now).

 

unpacked the 12.7 beta with winrar.

installed 12.7 beta, reboot. ( got a fail on the MS Redistributable, most likely because it was already installed ?)

 

installed MSI AB patch, installed 12.6 cap1, run ULPScontrol (ATIman) to disable ULPS, ATIman will auto reboot when finished)

(read a few pages back that MSI AB has removed these needed files in 2.2)

 

Installed MSI AB 2.2 and enabled UnofficialOverclockingMode in config, restart MSI AB

 

 

Seem to be running great, haven't done any benchmarks (maybe tomorrow because today will be Formula 1, BF3 and Euro 2012 England match tonight  tongue.gif )

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post #12429 of 38721
Quote:
Originally Posted by quakermaas View Post

Just installed the 12.7 beta and no problems with MSI AB and extended clocks  (I didn't use -xcl), when I tried 12.6beta with MSI AB I was getting the screen flicker and jumping

This might help others

Un-installed MSI AB

Un-installed ATI driver using ATIman 7.0.2 (think there is a newer one now).

unpacked the 12.7 beta with winrar.
installed 12.7 beta, reboot. ( got a fail on the MS Redistributable, most likely because it was already installed ?)

installed MSI AB patch, installed 12.6 cap1, run ULPScontrol (ATIman) to disable ULPS, ATIman will auto reboot when finished)
(read a few pages back that MSI AB has removed these needed files in 2.2)

Installed MSI AB 2.2 and enabled UnofficialOverclockingMode in config, restart MSI AB


Seem to be running great, haven't done any benchmarks (maybe tomorrow because today will be Formula 1, BF3 and Euro 2012 England match tonight  tongue.gif )

cool, yep the 9.0 beta(12.6/7 June 12th) is the drivers that give grief to oc programs that use the api.
 
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post #12430 of 38721
Thread Starter 
Quote:
Originally Posted by DaClownie View Post

Not to argue, but you're spreading wrong information. It's not "better" binned. They're simply binned to ensure that they can run at 1GHz at stock voltage. Stock voltage of the chip is still decided by the ASIC%. Lower ASIC means higher stock voltage (which typically means better water OCer, but not guaranteed). Higher ASIC means lower stock voltage (which typically means better air OCer, but not guaranteed). There's no promise of better OCing, or better power usage.
What ASIC quality did one reviewer get?
59% was it?
I think it had a lower voltage than a higher ASIC quality 7970.
I need to check up on that.

I honestly think there's a little more to it than just seeing of a particular chip can run at 1000-1050 MHz.
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