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Overclocking your graphics card is a very quick and easy way to get a little extra performance out of your system. The overclock that we went with when testing our Radeon HD 5750 should be considered as a mild overclock, as we were able to push the core and memory quite a bit higher. However to avoid any stability issues we backed the overclock off and in doing so still enjoyed performance gains as high as 20%. When running the core at 825MHz and the memory at 1335MHz, the operating temperature when under load increased from 75 degrees to 81 degrees. This 8% rise in temperature is nothing to be concerned with as the GPU is still operating well within safe limits. However as we mentioned earlier, if you can find a Radeon HD 5750 graphics card with an improved cooling solution, that would be the way to go if you do plan to overclock. While we saw an 8% rise in temperature, the system power consumption level also increased by 15 watts, which was a 6% increase overall. Again this is not a significant increase and given on average we received 15% more performance, the extra power demand can easily be justified. It was great to see that in games such as Batman Arkham Asylum and Wolfenstein, we were able to boost the performance of the Radeon HD 5750 to the point where it mimicked Radeon HD 5770 frame rates. Finally a word of advice when overclocking, never expect to reach a certain frequency, but rather hope for it. Just because we managed to reach a core clock of 825MHz with a memory frequency of 1335MHz, does not necessarily mean you will. Having said that, you may actually beat our overclock! As mentioned earlier, overclocking is best done in baby steps, bump up the core till you find its limits and then do the same for the memory. Finding the limit of one and then the other is much easier than doing both at the same time. Reviewed By Steven Walton |
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