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Overclock SLI reference MSI GTX 680 and MSI GTX 680 twin Frozr - Page 2

post #11 of 19

IN AB see that option to Synchronize similar GPUS hen apply after all changes
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kamikaze
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post #12 of 19
Thread Starter 
Quote:
Originally Posted by feznz View Post


IN AB see that option to Synchronize similar GPUS hen apply after all changes

That's what I had the settings on. Still not synchronized. Here's a pic:



I'm going to try and see if installing on the lower drivers would help.
post #13 of 19
EDIT: ignore this my bad
Edited by RB Snake - 5/29/13 at 2:17am
post #14 of 19
Thread Starter 
I found this thread on google http://www.evga.com/forums/tm.aspx?m=1856662&mpage=1 seems like the 600 series or newer card do not match each others' clock speeds anymore. They will run independently with their clock speeds in SLI. I guess I can just let these two run at their clockspeeds if there are no problems.... Bummer, I was looking forward to matching the twin frozr's clock too :/
post #15 of 19
Quote:
Originally Posted by RB Snake View Post

The factory overclocked cards clock speed does not have to match your reference card speed, with Kepler they can run independently. My 2x 680s both boost to different speeds, card 1 sits at 1176Mhz and the other sits at about 1200Mhz. They don't need to synchronize.

but the fact they are crashing instantly on load is indicating a problem
the base core speed should still match, the bios versions are different this might cause a different boost clock
there are rare instances where when there are different bios version between cards it can cause conflict see in your screenie the bios is different.
I have to be honest I am out of ideas apart from driver cleaner to remove NVidia drivers and re install NVidia drivers then AB
kamikaze
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kamikaze
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post #16 of 19
Thread Starter 
Quote:
Originally Posted by feznz View Post

but the fact they are crashing instantly on load is indicating a problem
the base core speed should still match, the bios versions are different this might cause a different boost clock
there are rare instances where when there are different bios version between cards it can cause conflict see in your screenie the bios is different.
I have to be honest I am out of ideas apart from driver cleaner to remove NVidia drivers and re install NVidia drivers then AB

I'm just going to independently overclock the reference card to 1059 core clock to match the twin frozr and the effective memory clock to 6008 Mhz. It says on the website that the reference effective memory clock is 3004 Mhz for reference and 6008 for the twin frozr. So I guess I'll just go and OC that. Should I even OC the memory as well or is it not necessary?
post #17 of 19
That looks like a good work around thumb.gif
I would estimate 1 point of 3dmark 11 in performance for 1Mhz increment of memory speed so it is bench measurable but I doubt it is going to make any difference in day to day gaming
kamikaze
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kamikaze
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post #18 of 19
Thread Starter 
Thanks feznz, you got +rep thumb.gif
post #19 of 19
Thanks I'll give you one for thinking of the work around
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kamikaze
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