Process Lasso "CPU (%)" lower than Task Manager CPU %

[Art Brown]

Greetings,
I noticed that Process Lasso's "CPU (%)" values for CPU-bound processes (BOINC tasks in my case) are lower (~8%) than Task Manager's (~10%) on a core i7-3930K (6 cores, 12 logical) running Windows 8.1.
Also, Process Lasso's "CPU Utilization" value (total CPU %) is about 75% when Task Manager's is about 95%.
I'd just like to understand why the values are different.
A screen grab showing both programs is attached.
Process Lasso Pro x64 version 6.7.0.52.
Please let me know if you need additional info.
Thanks for a great program.
Art Brown

[BenYeeHua]

Not sure about this...
I guess it is because they are seeing the CPU frequency difference, and calculate difference.

This happen with Process Explorer too, I just run 3 of them, and they are showing difference CPU usage, while Process Explorer showing higher CPU usage than the other 2.

[Jeremy Collake]

The CPU utilization is an average measurement during varying time intervals, usually 1 second. It will vary between programs depending on when their measurement interval starts/ends, as well as the interval length.

That said, the difference shouldn't be that large, and over time, should equal out such that they are all approximately reporting the same thing.