Underclocked CPU

[hannibal2469]

my brother has a q8400 cpu
its stock clock is 2.66 ghz
then why does cpu-z show a core clock of 2000.3 mhz
multiplier 6
fsb 333.4 mhz
is it limited by my motherboard it

 

[hannibal2469]

yes but the fsb*multiplier still comes out to be 2.000ghz
the fsb and multiplier dont change by themselves do they

 

[ghnader hsmithot]

it does.
http://www.overclock.net/intel-cpus/376099-speedstep-guide-why-does-my-processor.html

When CPU usage is relatively low, this feature lowers your processor's multiplier to its lowest setting (usually 6x) and slightly lowers its vCore.

 

[hannibal2469]

thx guys fr your replies
but can you tell me how this(speedstep) is different from turbo boost
also is their a utility which i can use to test if pc reaches 2.66ghz

 

[hannibal2469]

thx

 

[hunter315]

Turbo boost is speed step with the ability to increase the multiplier. Speed step can only decrease the multiplier and voltage to save power, turbo boost can increase the multiplier a couple of steps but not the voltage so it provides a limited OC if there is thermal headroom available.

 

[hannibal2469]

Turbo boost is speed step with the ability to increase the multiplier. Speed step can only decrease the multiplier and voltage to save power, turbo boost can increase the multiplier a couple of steps but not the voltage so it provides a limited OC if there is thermal headroom available.

are u saying that speed step does not increase cpu multiplier above the stock multiplier but only be able to decrease it i.e for a q8400 2.66ghz cpu , 333.4 mhz fsb, the multiplier would go from only 8 to 6 and not go above 8(as 8*333.4mhz=2.66ghz)
whereas turbo would have been able to go above 8
also are u sure that turbo boost does not increase vcore i think it does,
others are also open to reply