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Author Topic: memory clock of 6990 won't go below 780mhz control using msi afterburnet??  (Read 2926 times)
yyduinihao0
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June 13, 2011, 06:30:04 PM
 #1

Hi:

I am having a dual HD6990 set up in windows 7. I am using msi afterburner to downclock the memory clock for my cards however the memory won't go below about 780mhz.
say, If I set it to 625mhz it goes all the way back to 1250mhz...
Also, the min value on the adjust bar is 620mhz  so how can I even down clock the memory clock to around 300mhz???

So, Let me know what I did wrong...
Thanks in advance.

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xioros
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June 13, 2011, 06:50:31 PM
 #2

Set:

UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 2

Fixes for all your needs ... Smiley

Pls donate if this fixed it

Donate if I helped you :  1L3GxCRZwXEh8VwpPAociZQdTkhSHKGMoY
yyduinihao0
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June 13, 2011, 07:16:34 PM
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donate send. Thanks a lot

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liuk03
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June 28, 2011, 08:42:11 AM
 #4

Hi:

I am having a dual HD6990 set up in windows 7. I am using msi afterburner to downclock the memory clock for my cards however the memory won't go below about 780mhz.
say, If I set it to 625mhz it goes all the way back to 1250mhz...
Also, the min value on the adjust bar is 620mhz  so how can I even down clock the memory clock to around 300mhz???

So, Let me know what I did wrong...
Thanks in advance.

hi yyduinihao, i have the same setting, dual HD6990 on w7
can you tell me your settings as a core clock, memory clock, temperatures, etc.?
how much consumes in watts?
Thanks in advance  Smiley
liuk03
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July 06, 2011, 02:36:55 PM
 #5

Set:

UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 2

Fixes for all your needs ... Smiley

Pls donate if this fixed it

sorry xioros where i can set this paramaters "UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 2"?
ty
onis_uk
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July 06, 2011, 05:23:44 PM
 #6

exit from after burner

navigate to the MSI afterburner install folder and open the MSIAfterburner.CFG file in note pad

find the line at the bottom delete it and then paste in

[ATIADLHAL]
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 2

close and save

open up afterburner and it should be good to go !


if this works feel free to donate  Cool
lumberjack4
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July 06, 2011, 06:47:14 PM
 #7

I know on my machine I can only half the Mem speed on Afterburner, so I have to down clock it from 1200 to 600, restart Afterburner then I can go from 600 to 300.
steelhouse
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July 06, 2011, 07:00:09 PM
 #8

C:/program files (x86)/MSI Afterburner/msiafterburner.cfg

right click on cfg file, security, users, allow users to write file
liuk03
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July 06, 2011, 07:01:53 PM
 #9

I know on my machine I can only half the Mem speed on Afterburner, so I have to down clock it from 1200 to 600, restart Afterburner then I can go from 600 to 300.

i see the same thing...I have to down clock it from 1200 to 600, restart Afterburner then I can go from 600 to 300, but there are any risk to down clock so hard?
yetis
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July 06, 2011, 07:13:36 PM
 #10

I am only downclocking to 625 Mhz, because any lower setting makes my Dual-6990 system unstable.
Even with the unofficial config settings.

lumberjack4
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July 06, 2011, 08:31:06 PM
 #11

I know on my machine I can only half the Mem speed on Afterburner, so I have to down clock it from 1200 to 600, restart Afterburner then I can go from 600 to 300.

i see the same thing...I have to down clock it from 1200 to 600, restart Afterburner then I can go from 600 to 300, but there are any risk to down clock so hard?

I downclock all the way to 150 on my 6950's, but all they do is mine.  On my main machine I downclock to 300 on my 5870's and haven't seen any problems as long as I don't watch videos or play 3D games.  It's pretty stable for normal use.
CanaryInTheMine
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July 06, 2011, 11:50:56 PM
 #12

You can't downclock memory on 6990s by more than a 100 less than what the clock speed is at. (well it could be 110 less, but it's tricky to get that)

Example of what will work: 880/780,  900/800, 950/850 etc... etc...

Do not assume the above values is what you should be trying.  Do your own experimenting while watching temps and fan speeds.




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