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Overclocking to 2.40 GHz: the Board Is the Limit

The World's First 65 W Desktop Quad Core
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The Phenom 9100e has greater overclocking potential than the other Phenom X3 and X4 models. We were able to overclock the Phenom 9100e from its standard clock rate of 1.80 GHz to 2.40 GHz without increasing the core voltage.

phenom x4 9100e

At its original voltage of 1.100 V, the Phenom 9100e operates smoothly at 2.40 GHz.

phenom x4 9100e

There is, however, a slight hitch. As the Phenom 9100e has a fixed multiplier of 9x, it can only be overclocked by raising the front-side bus. To achieve a CPU rate of 2.40 GHz, we had to increase the FSB from 200 MHz to 266 MHz. This elevated FSB represents the limit for the AMD 790FX chipset with the SB700 southbridge. With a good portion of luck and by increasing all board voltages, some boards can be stepped up to 295 MHz. Most, though, are not stable enough for long-term operation in such a configuration.

When clocked to the level of a Phenom X4 9750, the power consumption of Phenom X4 9100e is fascinating — see the next page.

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