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GPU Core
The next thing we are going to do is see what our maximum GPU frequency is.
- Open GPU Tweak
- Either move the slider for the GPU to up by 10MHz using the mouse, the keyboard arrow keys, or directly key in a value 10MHz higher. The offset value will tell you how far from stock MHz it’s been changed.
- Apply the setting.
- Open FurMark and run the benchmark preset that you prefer.
- If your system passes, increase the frequency by 10MHz on the slider again.
- Apply and run FurMark again
- Repeat until your system fails the benchmark test or crashes.
- Drop back 10MHz from the last used setting using the slider
- Run the benchmark again to check
- If passed successfully stop there and record the frequency that your system passed the benchmark test successfully at.
Once again we have is a known frequency that our GPU can achieve, but yet without voltage changes.
Putting the Core and Memory together
Now the moment of truth: putting them both together. Most of the time it will not be possible to get the max core frequency and the max memory frequency that we achieved separately to be stable at the same time, but we will try and get as close as possible.
- Open GPU Tweak
- Leave the GPU core voltage linked to GPU frequency (this is the default setting)
- Move the slider for the core to 50MHz below your maximum previously achieved
- Move the slider for the memory to 200MHz below your maximum previously achieved
- Open FurMark and run the benchmark preset that you have selected
- Optional: If your system still passes, repeat 2-4 but increasing the core up by 10MHz and memory by 25MHz each time.
- If your system passes, run the 15 minutes burn in test and keep an eye on your temperatures.
- You have a stable overclock of your graphic card at close to the maximum that can be achieved without any additional voltages or special cooling.
If your overclock did not pass the FurMark stress test then do the following.
- Open GPU Tweak
- Move the slider for the core to 75MHz below your maximum previously achieved
- Move the slider for the memory to 200MHz below your maximum previously achieve
- Open FurMark and run the benchmark preset that you have selected
- If your system passes run the 15 minutes burn in test.
- You have a stable overclock of your graphic card at close to the maximum that can be achieved without any additional voltages or special cooling.
But wait there is more
At present we have the GPU core voltage and the GPU frequency linked in GPU Tweak. This works but it is less than ideal as it’s a bit overprovisioned. Normally we can reduce the amount of voltage needed to achieve what we currently have. Here is how we are going to find that out.
- If you have an ASUS graphics card, unlink the Voltage/Frequency by clicking on the little lock symbol, otherwise it will already be unlinked.
- Ensure your Graphic Core frequency remains at the final stable overclock achieved
- Reduce the voltage by small increments: I use 10mV steps.
- So if your voltage was at 1.050V reduce to 1.040V
- Run the FurMark test and if passes, lower the voltage again
- Repeat until your system does not pass
- Increase your voltage by one 10mV from the previous value
- Optional: Run FurMark to double-check.
You are done! Enjoy your overclocked graphic card. Please post GPU-Z screen shots with your best stable overclock and include the voltages you have used.
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