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CPU Roundup April 2010

CPU Roundup April 2010

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Overclocking

All three Athlon CPUs have locked multipliers, meaning we have to raise the base clock to overclock them. With the Athlon II X2 255 and X3 440, we managed to push the base clocks to 215MHz and 220MHz respectively, yielding core clock speeds of 3.33GHz and 3.30GHz. We managed to push the Athlon II X4 635 a little further to 3.48GHz with a base clock of 240MHz. The Phenom II X2 555 CPU has an unlocked multiplier. We raised the multiplier to 17.5 x with a 15MHz increase in the base clock, achieving a core clock speed of 3.76GHz.

  Stock OC
Athlon II X2 255 200×15.5 215×15.5=3.33GHz
Athlon II X3 440 200×15.0 220×15.0=3.30GHz
Athlon II X4 635 200×14.5 240×14.5= 3.48GHz
Phenom II X2 555 200×16.0 215×17.5= 3.76GHz

To overclock the Intel i3-530 processor, we used the “Auto-OC” functionality of the MSI’s H55M-E33 board. This increases the clock speed by 20% to 3.51GHz by increasing the base clock from 133MHz to 160MHz.

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Stuart Davidson

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