Where is the setting to lock CPU FSB on Asus Rampage IV Formula

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Junior Member
May 10, 2014
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Hello.

I've a I7 3930k and a Asus Rampage IV Formula since 2012. From day 1 I overclocked the CPU to 4.5 GHz 24/7, so far so good but there is one thing which annoys me, and that is the fact that the CPU clocks are constantly changing by let's say, 100 MHz (the FSB keeps changing in small amounts).

My question is, where is the option on BIOS so I can disable this behavior? I've already tried numerous times but never found it.

Regards.