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Overclock SLI reference MSI GTX 680 and MSI GTX 680 twin Frozr

post #1 of 19
Thread Starter 
Hello,

I recently bought an MSI GTX Twin Frozr for a really good price. I also have a reference MSI GTX 680. I currently have them both on SLI. I heard that the twin frozr will downclock to the reference clocks since the twin frozr is OC'd. Can I just overclock the reference card to the clocks of the twin frozr? I also have an aftermarket GPU cooler on my reference gtx 680, which is the arctic cooler accelerro twin turbo II. How do I go about overclocking the reference card to the twin frozr clocks using msi afterburner?
post #2 of 19
you are correct will run a default lower clock.
just install AB and be sure to link the clocks together in AB
The voltage is locked but will appear to adjust in AB but the monitoring graph will confirm this for you.
memory will be minimal gain so don't bother too much with that.
core clock you might be lucky to max out at 1200Mhz but I would aim for 1150Mhz.
of course be sure to keep an eye on temps and adjust the fan profile or max the fans out
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post #3 of 19
Thread Starter 
Quote:
Originally Posted by feznz View Post

you are correct will run a default lower clock.
just install AB and be sure to link the clocks together in AB
The voltage is locked but will appear to adjust in AB but the monitoring graph will confirm this for you.
memory will be minimal gain so don't bother too much with that.
core clock you might be lucky to max out at 1200Mhz but I would aim for 1150Mhz.
of course be sure to keep an eye on temps and adjust the fan profile or max the fans out

Hey feznz. By linking the clock did you mean go to settings and under the general tab, click on synchronize settings for similar graphics processor? I have that one checked. Also, I enabled voltage unlock, voltage monitoring and force constant voltage. Also, when you said memory will be minimal gain, should I just keep the memory at default clocks at 3004 Mhz, which is the default reference clock memory? The twin frozr memory is at 6008 Mhz. Also, after overclocking the cards to the default setting of the twin frozr, should I just run a stress test such as furmark?
post #4 of 19
Thread Starter 
so my reference clock is at 1006Mhz. I am aiming for 1150 like feznz said. On MSI afterburner, I added +144 on the core clock to make it equal to 1150. GPU-Z is showing 1150 core clock and 1203 boost clock. Now, should I be aiming for 1150 boost clock or core clock?
post #5 of 19
everything looks OK synchronize + memeroy clock, Core clock, But do not force constant voltage for everyday OC
1200boost clock would be the max max you could probably do without hard volt mod i.e. soldering
1150 boost is probably a safer top OC after that the gains will get very small and the stress on the cards will be too much.

I have found personally Crysis 2 or BF3 good for stability testing furmark is ok too but boring
be sure to monitor voltage I am positive you will find nothing will change no matter how much voltage you try to add

BTW be sure to push apply for changes to take effect
Edited by feznz - 5/29/13 at 1:11am
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post #6 of 19
Thread Starter 
Quote:
Originally Posted by feznz View Post

everything looks OK synchronize + memeroy clock, Core clock, But do not force constant voltage for everyday OC
1200boost clock would be the max max you could probably do without hard volt mod i.e. soldering
1150 boost is probably a safer top OC after that the gains will get very small and the stress on the cards will be too much.

I have found personally Crysis 2 or BF3 good for stability testing furmark is ok too but boring
be sure to monitor voltage I am positive you will find nothing will change no matter how much voltage you try to add

BTW be sure to push apply for changes to take effect

So should I not change the voltage then? I tried running furmark just right now with 1150 core and 1203 boost without changing the volatge and it didn't even last a second on stress test lol. I kind of just wanna match the clock of the twin frozr so should I just aim for that? Twin Frozr's clocks are 1058MHz core, 1124MHz boost clock. Also, the effective memory clock is at 6008MHz according to the website. Should I just aim for that without changing the voltage?
post #7 of 19
Thread Starter 
I just checked GPU-Z. on the bottom, you can click on which card you would like to see. when I click on the second card, which is the twin frozr, it didn't seem to downclock. It has the manufacturer's OC instead of downclocking to the reference card.
post #8 of 19
Thread Starter 
I uploaded two pictures of the reference clocks and the twin frozr's clocks on gpu-z here they are:



post #9 of 19
the fact it didn't last a second on a stress test means assuming that you have SLI enabled that the cards are not synchronized.
I would agree to just aim for the twin frozr clocks.
I never checked, I also assumed the memory is identical in size this is needed for SLI to work and SLI bridge is connected.
if you have synchronized cards and applied these settings then you have a problem.
Then again even if you Don't have SLI enabled then the clocks should be identical.
so if the above is correct then I would suggest a clean install of Nvidia drivers 320.18 may be not as reliable so maybe wind back to 314.22 and MSI AB 2.3.1
kamikaze
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kamikaze
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post #10 of 19
Thread Starter 
Quote:
Originally Posted by feznz View Post

the fact it didn't last a second on a stress test means assuming that you have SLI enabled that the cards are not synchronized.
I would agree to just aim for the twin frozr clocks.
I never checked, I also assumed the memory is identical in size this is needed for SLI to work and SLI bridge is connected.
if you have synchronized cards and applied these settings then you have a problem.
Then again even if you Don't have SLI enabled then the clocks should be identical.
so if the above is correct then I would suggest a clean install of Nvidia drivers 320.18 may be not as reliable so maybe wind back to 314.22 and MSI AB 2.3.1

I'm not sure what you meant by synchronize. Like Synchronize on MSI afterburner? I have that setting checked. also, I have the SLI bridge connected and configured it on Nvidia panel. Here's a screenshot:



As you can see, SLI is enabled on NVIDIA control panel.
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