Bus Clock/Effective Clocks Reported Incorrectly

[steakster]

Bus clock is reported as a constant number in HWInfo. In other applications like CPU-Z it monitors the Bus Clock, because it's not always constant. I am on a 7950x3D. This causes effective clocks to be reported incorrectly because it is using the wrong bus clock multiplier.

 

[steakster]

Like a x55 clock ratio is much different at a 106.5 blck and a 100 blck. Which I am able to trick the monitor into thinking I am at a 106.5 blck when in reality I am at a 100 x55 ratio, which causes the calculation to be off by magnitudes.

 

[Martin]

This depends on several factors like clocking mode (iCLK/eCLK0/eCLK1) and mainboard. I'd need to see the HWiNFO Debug File.

 

[steakster]

Here you go, in the menu it shows 108 bus clock, but its actually running at 101 under load. 108 is no load... EDIT: It says file too large for the server to process. How should I upload debug file its only 9.3mb

 

[Martin]

Compress the file before attaching

 

[steakster]

Its a short file but you should be able to see it hopefully.

 

[Martin]

The CPU in this case (eCLK1 mode) is running at two different reference clocks.
According to that data the CPU Core (CCLK) is running at 108 MHz refclk and Memory controller at 100 MHz refclk.
Are you saying that your CPU dynamically changes the refclk based on load? That's not possible.

 

[steakster]

The CPU in this case (eCLK1 mode) is running at two different reference clocks.
According to that data the CPU Core (CCLK) is running at 108 MHz refclk and Memory controller at 100 MHz refclk.
Are you saying that your CPU dynamically changes the refclk based on load? That's not possible.

Yes using core flex offered by Asus when temperatures reach a certain point I can change my async'd bclk. What I do is when I am over 55c (so into a load), I reduce to 100 cclk to hit higher boosts.

 

[Martin]

I see, let me discuss this with ASUS... We have certain BIOS-app interfaces to report actual BCLK but that tool doesn't seem to reflect this.

 

[steakster]

I see, let me discuss this with ASUS... We have certain BIOS-app interfaces to report actual BCLK but that tool doesn't seem to reflect this.

Thank you, that would be awesome. Somehow CPU-Z is able to grab bus speed in real time.