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For overclocking, what are the difference in increasing GPU Clock & Memory Clock?

Posted on 2014-03-02
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Last Modified: 2014-03-07
Dear experts,

Please share your knowledge and understanding on overclocking GPUs.

1) What effect does it apply in games if only 'GPU Boost Clock' value is increased but 'Memory Clock' value is kept at stock speed?

2) What effect does it apply in games if only 'Memory Clock' value is increased but 'GPU Boost Clock' value is kept at stock speed?

When I'm using GPU-Z to monitor, if I increase 'GPU Boost Clock' my 'GPU Clock' and 'Boost' value will increase but 'Memory' stays the same.

Many thanks.
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Question by:trihoang
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garycase earned 500 total points
ID: 39898925
They're two different things.    Boosting the GPU clock is running the graphis processor (GPU) at a higher speed.    Boosting the memory clock speeds up the memory transfer rate.

Which has the most impact depends on the specific game.   If it's limited by the GPU's computational capabilities, then boosting the speed of the GPU will have the most impact.   If it's limited by the ability to update the graphics memory, then speeding up the memory will help more.

But you obviously need to be careful as you experiment with increasing these parameters, as both can cause instability/crashes if increased too much.   Change them in small increments -- and TEST, TEST, TEST to ensure each new value is still stable.
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