IC7-MAX3 Modded Bios 1.7*Unhidden All hidden Feature* Här

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Spread Spectrum
Common Options : 0.25%, 0.5%, Smart Clock, Disabled

Quick Review

This BIOS feature allows you to reduce the EMI of your motherboard by modulating the signals it generates so that the spikes are reduced to flatter curves. It achieves this by varying the frequency slightly so that the signal does not use any particular frequency for more than a moment.

The BIOS usually offers two levels of modulation - 0.25% or 0.5%. The greater the modulation, the greater the reduction of EMI. Therefore, if you need to significantly reduce your motherboard's EMI, a modulation of 0.5% is recommended.

In most conditions, frequency modulation via this feature should not cause any problems. However, system stability may be slightly compromised in certain situations. For example, this BIOS feature may cause improper functioning of timing-critical devices like clock-sensitive SCSI devices.

Spread Spectrum can also cause problems with overclocked systems, especially those that have been taken to extremes. Even a slight modulation of frequency may cause the processor or any other overclocked components of the system to fail, leading to very predictable consequences.

Therefore, it is recommended that you disable this feature if you are overclocking your system. The risk of crashing your system is not worth the reduction in EMI. Of course, if EMI reduction is important to you, enable this feature by all means. But you should reduce the clock speed a little to provide a margin of safety.

Some BIOSes also offer a Smart Clock option. Instead of modulating the frequency of signals over time, Smart Clock turns off the AGP, PCI and SDRAM clock signals that are not in use. Therefore, EMI can be reduced without compromising system stability. As a bonus, using Smart Clock also helps reduce power consumption. The degree of EMI and power reduction will depend on the number of empty AGP, PCI and SDRAM slots. But generally, Smart Clock won't be able to reduce EMI as effectively as simple frequency modulation.

With that said, it is recommended that you enable Smart Clock, instead of the 0.25% or 5% option, if the option is available to you. It allows you to reduce some EMI without any risk of compromising your computer's stability.

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