Intel ULV Processor Is Always Underclocked.

[erosenin]

ThrottleStop should have the Set Multiplier value set to 28T. The T stands for Turbo since your CPU requires Intel Turbo Boost to use that multiplier when a single core is active. Post a screen shot or two while testing. It sounds like you are starting to figure out this problem.

Low power CPUs spend most of their idle time in one of the deep low power C States like C6. When in this state, you don't have to worry about what the multiplier is. In C6, the CPU drops the voltage and power consumption for that core to virtually zero so a high or low multiplier doesn't make any difference. Some people have a hard time understanding this concept. Here's some light reading about why a high multiplier is best.

Power Optimazation - A Reality Check
http://www.cs.berkeley.edu/~krioukov/realityCheck.pdf

Thanks for the helpful paper.

Changing the power level from 0 to 1 doesn't seem to be having any effect and somehow I can't change it to Level 2
Here are some screenshots.

 

[erosenin]

Yes. If the bios sets the lock bit then software can not adjust it. The only way around this is with a modified bios. I thought BD PROCHOT might be causing the problem with your multiplier but it looks like it was just the Set Multiplier value was not set correctly. Not sure why.

Your screen shot shows that the Power Limit Register has been Locked so that blocks user software from adjusting the TDP limits. You shouldn't need to worry about this now that the multi is working.

When Turbo Boost is being used, the multiplier will rapidly vary depending on whether 1 or 2 cores are active. You can look in the TRL window. It will show you the maximum multiplier depending on whether 1 or 2 cores are active. The multiplier is also locked. This is only adjustable in the XM mobile CPUs or some of the upper level Core i7 CPUs. It is also adjustable in the desktop K series.

Hmm.. with this I think the multiplier is working fine. Though I wonder what causes it to go into that low multiplier state and never return from it without changing from this utility. Once I fix it to 18 or any Turbo limit(19T-27T). It acts dynamic and spends the C6 state percentage also goes up. So, I guess the processor is fine.

 

[unclewebb]

When a mobile CPU is lightly loaded, it will be rapidly entering and exiting various low power C States. This causes a lot of multiplier fluctuation within the CPU. The ThrottleStop docs recommend using the Windows High Performance Profile so that ThrottleStop won't have to fight with Windows over control of your CPU.

What laptop model do you have and are you using the latest bios? There are lots of problems out there and many people have no idea.

I posted a few more things on the last post of the last page. I didn't notice that you were on page 2 already.

For low power consumption when idle, maximimizing the C6 percentage is the best way to save power. My 3rd Gen U CPU starts using C7 but only when on battery power.

 

[erosenin]

Thanks for the help everyone and as I was busy with my exams so couldn't reply back. But I found the problem. In Samsung Notebook's it's due to a setting in Samsung's settings app which is quiet mode. If it's swithced to Auto it underclocks the PC.