Do all systems do this?

[orangecat]

I set my CPU to 4.2Ghz and the CPU frequency jumps around a bit according to software readings. I turned off all power saving things so that my CPU always runs at the frequency I set it to but it sometimes goes higher or lower even though it shouldn't.

 

I assume this has to do with how the system clocks are generated but I can't actually measure this so I thought I'd ask and see what others think. Basically my CPU is at 4.2Ghz but according to AIDA64 and CPU-Z my actual clock speed is around 4199Mhz to 4204Mhz. I've never been able to get my base clock to stay at exactly 100Mhz so it's normally around 99.98Mhz and it does sometimes change when the system goes under load but it never goes way out of spec.

 

Is there a more accurate way to monitor hardware in Windows or am I stuck using what's widely available.

 

Also how accurate is software monitoring anyways? AIDA64 shows different temperature readings that RealTemp.

[QueenDemetria]

6 minutes ago, Kilobytez95 said:

Is there a more accurate way to monitor hardware in Windows or am I stuck using what's widely available.

Frequencies usually move around a few Mhz, just the nature of the beast.

 

Edit: with the BCLK/FSB and CPU

[*SilenT*]

A few Mhz are totaly normal...