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Of course, this does not mean we are not going to try overclocking the card. Even though the Radeon HD 4870 will handily tackle practically every 3D game out there, there is still a dragon left to slay and that dragon is called Crysis. The Radeon HD 4870 delivered an average frame rate of 38 fps at 1600 x 1200 and 32 fps at 1920 x 1200. Very good but it would be nice to have better frame rates, wouldn't it? So, let's see how well the Radeon HD 4870 overclocks!

Like in our previous overclocking guides, we did not want this to be an example of extreme overclocking, where you would need to resort to third-party coolers. With that method, you can achieve an incredible degree of overclocking but it would come at a significant cost. We wanted this attempt to come at "no cost" to the user. That meant overclocking the Radeon HD 4870 using its standard cooler.

http://www.techarp.com/showarticle.aspx?artno=580

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