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tistou77

bug frequency

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Hello

 

I found a bug, the CPU is to 4500Mhz (45x100)

there is indicated 4500mhz

 

 

 

But this is indicated 4200mhz (benchmark)

 

 

CM: Asus Rampage IV Extreme, tested with bios 4401, 4403

CPU: 3930K

 

 

Thanks

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During benchmarks the CPU may or may not be able to use its maximum Turbo frequency.  I guess in your case the CPU is only able to switch up to 4200 MHz during the benchmarks.

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Since the 43xx bios of the Rampage IV Extreme, is indicated x42
After the boot, I run the benchmark is "x45", I close benchmark and I re run the benchmark, it's "x42"

It's same with Aida64 CPUID

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The current multiplier the CPU is running at may be difficult to measure ot detect.  For example, at idle it may be running at 45x, under partial load (like running a game) it may be working at 42x, while under full load it may switch down to 40x or so because of power (TDP) limits.  Turbo Boost is a very complicated technology in modern Intel processors ;)

 

BTW, between BIOS updates such settings like max. Turbo Boost multiplier or power limits may change.

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