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Need help overclocking 660ti

post #1 of 9
Thread Starter 
Hi, I need help overclocking my gpu but to no avail have I been able to find a stable clock.im running a MSI 660ti PE, should i have max settings when running Heaven?
post #2 of 9
If you're running Heaven 3.0 @ max eye-candy and using any resolution over 1920x1080 then that benchmark will likely eat that vidcard alive.
What are you using to OC with; MSI Afterburner? Some other?
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post #3 of 9
Thread Starter 
msi afterburner
post #4 of 9
Quote:
Originally Posted by Project X View Post

msi afterburner
Make sure "Power Target" is set to max. I've found its best to first find max stable core speed, then max memory speed.
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post #6 of 9
Thread Starter 
how would i go about finding a stable clock?
post #7 of 9
Quote:
Originally Posted by Project X View Post

how would i go about finding a stable clock?

Did you read the guide I linked to?
     
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post #8 of 9
I quoted the "quick" overclocking method from the guide I linked to. Courtesy of "SeanPoe" from here on OCN. It should give you an understanding of how to go about things.
Warning: Spoiler! (Click to show)
Using this method should get you within about 2-5% of your card's maximum overclock but in a lot less time. For most people, overclocking using this method is probably ideal. If you followed the long overclocking section of this guide, skip this and go to the Fan section instead.

Step 1: Preparation:
Be sure your fan curve is setup like i mentioned above in the Precision-X setup section. It's important to keep your GPU under 70C at all times to prevent thermal throttling.
Temporarily increase both the Power Target and Voltage slider to their maximum value. This will minimize the throttling caused by going over the Power Target.
Go to the Nvidia Settings menu (you can open this from the taskbar), go to Manage 3d Settings, Global settings tab, scroll to the very bottom and make sure Vsync is set to off. You can turn this back on after you find your maximum overclock if you wish.
Increase the GPU Clock Offset by whatever it takes to get your Boost Clock to 1100MHz. So that means if you're using a reference model with a default Boost Clock of 980 you will need to increase the offset to +120. If you're using a Factory overclocked card, then you will need to increase the offset by +10 to +50 (or until you hit 1100MHz Boost Clock) depending on which card you have, just use GPU-Z to keep track of your Boost Clock.
Start a Heaven Benchmark run. If you make it to the end of the run, then go to Step 2, if you crash or have other signs on instability, go to Step 3

Step 2: Finding your maximum core offset
Increase the core offset by an additional 20MHz
Start up another Heaven Benchmark run
If you make it to the end of this run, repeat this step until you crash or show signs of instability and then go to Step 3.


Step 3: Finding your maximum core offset
Reduce the core offset by 5MHz
Start up another Heaven Benchmark run
If you DON'T make it to the end or show signs of instability, then repeat this step until you can finish Heaven and then go to Step 4.


Step 4: Fine tuning your maximum core offset
Increase the core offset by 2MHz
Start up another Heaven Benchmark run
If you crash or show signs of instability, then remove that additional 2 core offset and go to Step 5.
If you don't crash or show signs of instability, then go to Step 5.


Step 5: Finding your maximum memory offset
Now increase the memory offset by 100
Start up a Heaven Benchmark run
If you make it to the end without seeing any graphical artifacts and see your Heaven Score increase, then repeat this step until you crash, see artifacts, see your score decrease by more than 5 points, or show other signs of instability and then go to Step 6.


Step 6: Finding your maximum memory offset
Reduce the memory offset by 25
Start up a Heaven Benchmark run
If you crash, see artifacts or show other signs of instability, then repeat this Step until you no longer do then go to Step 7.


Step 7: Finding your maximum memory offset
Increase your memory offset by 12
Start up a Heaven Benchmark run
If you crash, see artifacts, see your score drop by more than 5 points, or show other signs of instability, then remove the additional 12 memory offset you just added and go to Step 8
If you don't crash, see artifacts, see your score drop by more than 5 points, or show other signs of instability, then go to Step 8



Step 8: Checking for Instability in other Applications:
Heaven Benchmark will get your GPU stable in about 99% of other games, benchmarks and applications, but it's still a good idea to test your overclock in a couple other applications just to be on the safe side. I'd suggest starting with 3dMark11, then any of the other free game benchmarks i posted above, then boot up a couple games that you typically play (BF3 multiplayer is usually a good stability testing game if you have it).
If you crash in any of these tests, then reduce your core offset by 2 until you stop crashing
If you see artifacts, then reduce your memory offset by 5 until you stop seeing artifacts


Congratulations, you're now very close to your maximum overclock. Go on to the Fan section of this guide.
     
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post #9 of 9
Use MSI Afterburner version 2.2.3. Voltage settings don't seem to work in the versions after that.
Since we have the same card here is my settings you can use as a guide to get you started:
Core Voltage--+100
Power limit--114
Core Clock--+170
Memory Clock--+600
Memory Voltage--+40
Aux Voltage--+30
Don't overclock gpu and memory at the same time when checking for max stability. Do one and then the other so that you will know what to adjust to get your card stable.
I also set a fan profile to allow my fan speed to hit 50% at 60c.
These settings allow me to hit 1398mhz gpu on Turbo boost and 1802mhz on the memory.
Also don't use Furmark , MSI Kombustor or any program like that to find your max stable setting. Play games! I play 2 hous of Crysis 2 and 2 hours of Battlefield 3 to check for stability.
Edited by division2 - 2/3/13 at 2:57pm
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