The ThrottleStop Guide

I know the Non Turbo Ratio can prevent the Set Multiplier feature from working correctly. The problem is that I think this can be set in two different places and ThrottleStop only has access to the Non Turbo Ratio in one of the two locations. It probably won't make any difference but did you try using the Lock option for this setting?

Did you also try using the Clock Modulation setting? I think on my 3rd Gen desktop CPU, this was a secondary way to control the multiplier. I will check my desktop Skylake to see if this still works. Edit - This does not work.

I think the reason Intel created the Non Turbo Ratio was to come up with an easy way to eliminate all of the intermediate multipliers. The intermediate multipliers are inefficient. Running a CPU fast will let it complete tasks quickly and this allows the CPU to spend more time in one of the low power C States when it has nothing to do. This is the future of computing at Intel.

I hope that screenshot you posted is not when your CPU is idle. A Dual Core CPU should be spending 1.0% or less in the C0 state when your computer is idle. To reduce heat and fan noise and to improve battery run time, work on getting this number as low as possible. Can you post a screenshot of the C State window when your CPU is idle? The U CPUs support C8 / C9 / C10 but I haven't got around to adding that feature to ThrottleStop yet.

 

Just working on writing a new Limit Reasons tool that supports both Haswell and Skylake. I was always a big fan of the simple but very useful Limit Reasons tool that Dufus wrote so I have decided to write my own using his design as my template. Throttlling Skylake CPUs could really use a tool like this and hopefully soon they will have one. By building this tool directly into ThrottleStop, it might also keep the over eager virus scanners a little happier.

 

I have been tinkering with overclocking and undervolting with my 4710HQ using uCode 02. Normally I would have to use around 1.18V to achieve stable performance at 4.3-4.4Ghz, but then something happened.
When I hit over 1.20V, and using adaptive I managed to get a "cold" overclock, i.e. even at such speeds the CPU would stay in the 1.01-1.03V range and only touch 1.20 (momentarily) when needed. This only happens on Profile 1.
Thus my temperatures are way down (still need liquid metal).
I would like to know how did this happen and if it can be copied to other settings. I have attached my TS.ini file for debugging. Thanks

 

I just reinstalled windows 10 ( 1607 )and am unable to minimize it to the tray as well as tick show cpu or show gpu in the options ( I can tick cpu mhz )
Everything else is working fine. I was able to minimize it to tray as well as tick show cpu / gpu in my previous install so don't know what's wrong now. Any advice ?

Thanks

 

Uncheck the "task bar" checkbox.

 

Hello Unclewebb, sorry for the delayed answer. Lock option does not make a difference. About the screenshot I was just waiting until the frequency was higher than the ´set multiplier´ option to verify if the setting was working or not. Idling, it looks more or less like this, with some fluctuations.
There seems to be also some issue with the cpu states on W10AU ( https://www.reddit.com/r/Surface/comments/4wfish/progressfix_for_the_anniversary_update_cpu/), so I applied the recommended regfix in that thread (not sure if was a good idea though). It seems that the Surface pro 4 cpu is consistently using C0 state (as compared with a 4700mq cpu from another laptop). Any suggestions on settings I can play with? I already have a good undervolt ratios (as seen in last screenshot) but not sure if there is anything else I can tweak. Thanks a lot in advance!!

 

Hello,
I have a Lenovo Yoga 3 11 with a 5Y71
without Throttlestop it runs often at 498.84 MHz. Limit Reasons marks PROCHOT Red ad Core and Uncore and shows it Yellowat Ring. Uncore haves also a Yellow MPO. Additional there is Yellow EDP at UnCore and Ring


With disabled BD PROCHOT it runs most of the time at 798.15 MHz, and ifit does either everything at Limit Reason is Yellow or MPO is red.
Sometimes I have luck and run at over 1000 MHz and with turbo even higher.
I have no Idea why I stuck at 798.15

 

I have tried both, checking and unchecking the taskbar box but it doesn't work on this laptop after the reinstall ( worked before I formatted and reinstalled )
Undervolting works fine though, just the notification icon and minimize doesn't work.

 

I the past when I was using 4940MX in Dell M6800, I could check the "Chipset Clock Modulation" and put the computer to sleep and wake up to trick the EC for preventing CPU throttling (System current throttling) when GPU is under load. But now the Skylake doesn't have the "Chipset Clock Modulation" check anymore. Is it possible to have other way to prevent EDP throttling? My 6700K throttles badly in P870DMG when system power draw reach about 280~300 watts (locking PL3 and PL4 to high value does not help). I heard that the 6th gen CPU will try to drain battery when system loaded about 80~90% of the capacity of the AC adapter. If the EC was designed not using any battery then it will throttle the CPU instead. The MSI laptop I owned didn't throttle the CPU (even though I clocked it to 4.3G with 1.3v) during GPU loaded seems like because it can drain battery. I really wish I can know what register I should look into in the EC.

 

I'm not sure if this will help this specific issue, but you could possibly look into flashing Prema's BIOS if you haven't already.

 

I don't have Prema's BIOS and I don't think he will release it. I am using my self-unlocked BIOS. But even though setting all PL1, 2, 3, 4 values and high current limits still cannot stop the EDP throttling issue. I miss the "Chipset Clock Modulation" lock in 4th gen CPUs. Hopefully unclewebb can find a new way to prevent EDP throttling in 6th CPU by blocking the EC intervene it.

 

@akg7091 - You need to delete the Windows icon cache so Windows can rebuild it. Info about how to do this is in the ReadMe file that should be included in the ThrottleStop download. Next version of TS might have a permanent fix for this long time TS / Windows issue.

@kanser - What is running on your Yoga 3 11? The screenshots you posted show that the first 2 threads (first core) is being fully utilized so something is running on your system. Are you doing a stress test in the background that you forgot to mention? Open up the Task Manager and have a look at all tasks that are running on your system. The Yoga is a low power computer. It is not going to be able to run properly until you stop the task that is fully utilizing half of your CPU.

After you take care of that problem, try checking off the Set Multiplier option and set that to the maximum value. What value is being used in the FIVR window for the Non Turbo Ratio? Make sure that NTR is set to zero when playing with Set Multiplier. You can also try setting NTR to 1. A setting of 1 fixes the throttling issues in my Lenovo Y510P.

 

Thanks. This worked perfectly !

 

thx for response,
I am doing work on the Yoga 3 11 having opened many Programms including a debugger for a big Java Programm. I know that the Yoga is not that strong but I also know that the throttle remains if I close all the Programms (cant do it now). I dont need mutch Power if it runs at ~1,1GHz I can do everything at sufficient speed (wouldnt even need the turbo which I also get if Im not throttled). But at some point I always reach the moment there it locks at 0,78/0,80 and this moment ist not linked to the tasks I have running it can also happen if im only surfing the web with just one browser (There is a thread about this problem at Lenovo, Im not the only one with the Problem) the sameway as I can have fullspeed with all this Programms running.

---------------------------------------------------------------
Now the complicated part
Background knowledge:
The NTR is set to 11 (i tried to play with the number in the textbox but the number in the label didnt changed even if I used Apply and Ok).
somehow I could set it to 10 and couldnt change it again but it was 11 later again.

Hoveawer after reading your post I tested it again:
While NTR was on default I just increased the number of Multiplier with the arrow (since I dont know what the max is). But This rapidly increased the Mhz to over 2Ghz and I was scared that this could be to mutch so I set it back (since I dont want to overclock but just get to the "standard" speed of the processor).
After that I tested to set NTR to 1 again (also clicked on lock) and it worked. First I was at over 2Ghz assuming that the turbo was on and now im sitting between 1,6 and 1,81GHz. Because my Taskmanager tells me that 1,4Ghz is the max of my processor I wanted to try to set the NTR to 2 to see if this lowers the speed a little. But now again Im stuck at NTR 1 and cant change the value to 2. Because this didnt worked,
I enabled BD Prochot again, and it didnt changed anything. I am at at 72Celsius and thekeyboard is a litle warm.

Update:
It seems going to hibernate mode and turning the notebook on changes the label of NTR to the number you put into the box. I set it to 4 and now it looks like Im alternating between 1,3 and 1,9Ghz. I think this s ok.

 

nvm

 

http://ark.intel.com/products/84672/Intel-Core-M-5Y71-Processor-4M-Cache-up-to-2_90-GHz?q=Core M 5Y71

Intel designed the Core M-5Y71 to be able to turbo boost up to 2.9 GHz for short periods of time when needed. This is perfectly safe. The maximum multiplier is 29 so the ThrottleStop Set Multiplier option should be set to 29. This is not overclocking your processor.

It sounds like your Yoga has been deliberately crippled by Lenovo, similar to my Lenovo Y510P. Thanks for letting me know that ThrottleStop works on the Core M series. Don't be afraid to use ThrottleStop so your Yoga can run at its full Intel rated speed.

 

Hi,
thanks to your software my i7-6700HQ now runs much cooler and quieter. I was able to undervold by -150mV across the board except the GPU for which -125mV seems to be the limit. It also allows me to override a rather stupid limitation which sets the maximum frequency on battery to 1.6 GHz.

On windows everything is perfect, but I also dual boot Linux. I found a way to work around the 1.6Ghz limitation but I have some trouble setting the voltage offsets. So far I found where these values are stored, but not how to write to them.

After a lot of googling I found that FIVR control is located in something called " OC Mailbox" which according to HWBOT info pages is " a set of registers which contains a complicated interface that allows for adjustments of maximum operating ratio limits and voltage target parameters for turbo, graphics frequency, and ring". I also found a tool that will print the current values and confirmed they match my undervolt settings. Here are my settings printed by AIDA64's MSR dump:

Code:

------[ OC MailBox ]------

C 01 / P1 00 / P2 00: 00000623
C 01 / P1 01 / P2 00: 0000073C
C 01 / P1 02 / P2 00: 00000623
C 01 / P1 03 / P2 00: 0000073C
C 02 / P1 00 / P2 00: 1F202123
C 02 / P1 00 / P2 01: < FAILED >
C 05 / P1 00 / P2 00: 000185C4
C 10 / P1 00 / P2 00: ECC00000
C 10 / P1 01 / P2 00: F0000000
C 10 / P1 02 / P2 00: ECC00000
C 10 / P1 03 / P2 00: ECC00000
C 12 / P1 00 / P2 00: 00000000
C 14 / P1 00 / P2 00: 00000000

The lines " C 10 / P1 00" to " C 10 / P1 03" correspond to the categories in the FIVR window in throttlestop. The values also match the voltage settings stored in throttlestop.ini.
From this output I gather that these are not MSR registers, but must be something else. I tried poking around in RWeverything but could not find them. Can you explain how do you access and modify them? If it requires writing some C/assembly it shouldn't be a problem.

Now I know you ignored a similar request in this thread multiple times, but please let other users benefit from your knowledge of this area. So far googling around it appears only you and Dufus seem to know about these undocumented registers. I beg you, share this knowledge. If you can't post it here publicly then PM me.

Thanks again for making our machines run better.

 

Information about the Overclocking Mailbox is only available by signing a NDA with Intel. I will not be sharing any information about that register, publicly or privately. Good to hear that using ThrottleStop has your 6700HQ running like Intel intended it to run.

The new Limit Reasons is undergoing final testing. I needed to use ThrottleStop and RW Everything to gimp my laptop so I could watch Limit Reasons light up like a Christmas tree. Some Prime95 and LinX testing helped push it to the brink.

 

Hi there, I currently own an Alienware 15 2015 laptop; 4720HQ 980M 4G. When the cpu and gpu both heavy load, it starts to throttle down to 800mhz while the temps are around 70C-85C. I have downloaded throttlestop 8.2 and followed this users settings: http://forum.notebookreview.com/threads/early-2015-throttling-some-info-id-like-to-share.787044/ but when i run the game overwatch with epic settings, although it doesnt throttle, but it has limit reason TDP throttling. Doesnt it mean i am not supposed to follow the user's setting? Thanks in advance

https://postimg.org/image/pc6f2swq5/
https://postimg.org/image/nyes7hxgt/
https://postimg.org/image/b8ajuepil/

 

Known issue with AW15... That's why don't buy Alienware BGA junk!!!

 

Read the whole thread http://forum.notebookreview.com/thr...rottling-problems.792344/page-4#post-10323312

Also read http://forum.notebookreview.com/threads/pch-heatsink-mod-alienware-15.794484/page-4#post-10311494

 

Hello Unclewebb, do you have any suggestion on improving the thermals on the SP4 ? Thanks!!!

 

@unclewebb

My G752VS PL1/2 is not unlockable / adjustable with throttlestop

 

Now that @Prema has a donation thread for all the work he has done, we should have one for @unclewebb for all the work he has put into Throttlestop so he can get a Kaby Lake system and develop Throttlestop to new heights!!

 

+1

 

Hello

I would like to ask some noob question, where TrotlleStop settings are stored? I would like to revert it to default, but can't.
It remember some values even after bios reset and windows reinstallation... Can it be that some values are permanently stored in bios?

Thanks

 

Exit Throttlestop and delete ThrottleStop.ini file in Throttlestop folder. This file contains all of ThrottleStop settings. Turn of your computer. Then start up again and your cpu settings is back to default. Ps... Nothing is stored in the bios!!
Still problems... Reset bios to default or reflash latest bios(if you have done a few changes or perhaps used XTU).

 

@Ethrem

It's been 6 years, why is this thread still not a sticky?

 

Hello,

On windows server08r2, the version 8.1b2 cannot be minimized and does not start up minimized, even though the option is checked.
I have a laptop with a i520M running windows 7 and I use your software. I do not understand ''clock modulation'' and ''chipset modulation''/
Can you tell me what throttle means ? what is throttled ? why do I want them to be 100%, if you allow them to be lower than this? also, what is the percentage of ?

also, I would like to see an option to have a range of multipliers allowed, instead of fixing only one, like in RM CLOCK>

 

I had that minimize problem for MONTHS and I tried everything to solve it. A few days ago, I noticed that the problem went away randomly and now it works 100% fine. Very weird.

 

I am using throttlestop for undervolting. I decresed the cache, core and Gpu too much and got a blue screen from windows. After the blue screen the laptop is running hot (even If increased or reset to zero the offset values). What should be happen? Maybe windows changes something internally after the bluescreen.

 

following your reply, I checked the file .ini and I changed TaskBar=1 to TaskBar=0 and now the minimization works well !

 

Stop Throttlestop from running on startup and completely power off and then power on your computer. This removes all Throttlestop modifications there should not be any issues.
Assuming your computer is back to normal after this, delete your throttlestop.ini file and start again.

 

Oh, I tried that too, as well as deleting the .ini and doing the settings all over again, literally nothing helped. I'm glad it fixed itself for me, though.

 

I installed Hyper-V on server 2k8r2 on my laptop with i520m and now it seems that I lost partly the ability to change the multiplier, either through windows power scheme or through throttlestop. It is worse on throttlestop because the FID is blocked at 20, even though I do not set it to a fix value. I can get 9 only when I fix it. Alos the option ''C1E'' when checked make the computer buzz. The lowest FID I can get with hyperV is 13, instead of 9. Is this normal? How do I get back my FID 9 ?

 

[/IMG] @unclewebb

Yesterday I flipped through 100+ pages in this thread and was surprised to see just how much effort you utilize to help so that's a nice thing to see.
I think that I managed to get the rough picture of my system based on some of the comments you made and from seeing various users with the same CPU testing their configs and giving results. The Community is great but the topic is too long (even for a search tool).
Naturally, after some time I got lost in the thread and was unable to find (I think it was your comment) config comment - the one that says what you need to do with i5 4200U.

So, I would like to ask you if you would help me with the config for my Ideapad Z710.

i5 - 4200U
17'3 FHD
1TB HDD
8GB DDR3 1666MHZ
GT 745M 2GB
WIN 10 64-BIT

I will post screenshots and the log file (in which i had an idle environment for 10-15 minutes and after that started stress testing it (BF3,BF4,BF1beta). It was the first time in years that I+ve seen this machine being able playing those games for longer than 30-40 minutes. However, throttling was just delayed, not eliminated.

What I did was turning off the BD PROCHOT, (multiplier automatically set to 31T), in FIVR I used PowerCut (which seems to help a lot) and Inter-Power Balance was set to CPU 31, NVIDIAGPU 0.
Other settings untouched. Why?
Because I don't understand some of them, but the one I understood and had problems with was voltage - I set it to static, 0.80, offset -50 and whenever I hit apply my PC freezes and demands a manual reboot.
So that's all info I got for you, I am happy to see that I actually have a chance to utilize this laptop for some gaming with the consistent performance but would need your help with it.



here's the log.
https://drive.google.com/file/d/0B8xwLX7iusE7UEIwbnI5ZFo5dWc/view?usp=sharing


I see that some of the people are struggling to make some improvements especially on 4th and 5th generation, and lots of people are coming here with their processors and specific problems. I read that there is no test base, people are not willing to help the creators with testing. You can count me in if it is needed. I want to improve my performance and I learned that waiting for the final product that will take care of my problem is a wait that's too long, many things can be achieved faster with some proper testing and good communication.


Thanks in advance.

 

@Kriistofor - First of all, you do not have a Core i5-4200U processor. Your screenshots show that you have a Core i5-4200M. They are completely different. The U is a low power CPU which is basically designed to throttle. The 4200M has a 37 Watt TDP limit which isn't too bad at all considering that this is only a dual core CPU.

Where is that option in ThrottleStop?

The option you are referring to allows a person to split the power balance between the Intel CPU and the Intel GPU. If you are using the Nvidia GPU when gaming, this option probably isn't going to do too much.

http://ark.intel.com/products/76348/Intel-Core-i5-4200M-Processor-3M-Cache-up-to-3_10-GHz?q=4200m

If you look through the Intel specs, this CPU is designed to start thermal throttling and slowing down when it reaches a core temperature of 100°C. If you look at the main ThrottleStop screen that you posted, it says PROCHOT 85°C. What this means is that Lenovo decided to ignore the recommended 100°C throttling temperature and used a -15°C offset to get the CPU to start thermal throttling way sooner at only 85°C. I have no idea why manufacturers do stuff like this but when you combine that with an inadequate cooling solution, performance is going to suffer. Your log file shows that your CPU is spending the vast majority of its time thermal throttling and bouncing off this lower than recommended, maximum temperature. There is nothing that ThrottleStop can do about that and there is nothing that Lenovo is willing to do about that. This was done deliberately as part of their design.

There is one user here that knows a trick or two and might be able to bypass this limit but doing this stuff is beyond me. Try finding @Dufus
Maybe he can help if he has the time. Your other option is to pull your laptop apart and thoroughly clean it including replacing the thermal paste and doing whatever you can think of to improve cooling. That is your biggest problem.

The voltage that you are trying to set is too low. When your computer immediately crashes after hitting Apply or OK in the FIVR window, that is usually a good sign that you have gone too far. Most people do not use Static voltage on their laptops. They only use Offset and they do not combine the two. Leave it on Adaptive - Default and then try starting with an offset voltage of -50 mV. Most CPUs are stable at this setting. I would not recommended touching the voltage settings unless you are willing to do some full load and part load testing to make sure that your computer is stable. If you do not have the time or patience for some proper testing, probably best to leave the voltage adjustments alone.

Your screenshots show that you have not enabled the PowerCut feature. Do a Google search to learn more about this feature. I deliberately left this setting a little obtuse to encourage users to do some reading before trying this. Power is not your biggest problem so don't worry about PowerCut yet. Concentrate on reducing your core temperatures.

 

I'm amazed that I hadn't heard of this (amazing) tool until today. I've been looking for ways to cool down (and increase the battery life of) my Thinkpad X220 Tablet (equipped with an i5-2520M), since it seemed to be sticking at maximum CPU speed unless I forced it to a low multiplier with a power plan, and this is just the ticket.

Any clues as to how I can configure this to achieve maximum power savings without crippling the computer's performance? I've already found Power Saver and its C0% setting, and I've set that to 95%, as well as disabling turbo on battery (though I don't know how much that will help battery life, what with race-to-sleep and all). My laptop is noticably cooler and quieter already when testing these out!

I also figured out how to lower the clock speed to 100 mhz, but the laptop is a bit less usable like that (and it only saves a few hundred mw).

Unfortunately, I'm at a loss as to C-state settings and pretty much everything else. The cores seems to be entering C6 a decent amount of time, but never C7, and the "package C state percent" is stuck at 0% for everything. I also don't know if I've configured the GPU to save energy at all, other than Intel's power plan settings in the driver.

What would you folks recommend?

Edit: I unplugged it and now it seems to be spending some time in C7. I am slightly miffed that in the past week since I refurbished this thing and bought a new battery, it's gone from 5-6 hours of battery life to ~3-4, despite no significant drop in full charge capacity. No idea what changed.

 

I check the "Power Saver" option. While the TS manual states it's for Core 2 era CPUs, it also works on later gens and forces the CPU to use lower frequencies when idle.
Helps a lot on temps and battery (I have an i7 4710).

 

Surface book powercut locked?

 

Actually, as UncleWebb points out, slowing overall clock speed may be counterproductive for power saving. It actually takes less energy for the CPU to go up to full speed and complete the task quickly and then return to C state - net is more time in C state. I could imagine that it might also apply to use of turbo. Of course, it will all depend on the tasks. But, other than benchmarking, gaming, and processing video, many of the tasks we do are not very CPU intensive. There is a discussion of this issue in the Throttlestop thread.
Best,
Joe

 

Yeah man I am sorry that you had to write a reply so long.
I just checked my box just to make sure I was not trippin' and yeah, my laptop was shipped in the box of another model (config was the same on the box except the CPU and RAM (6 vs. 8Gb that I have). Funny thing is, it is bought in a shop.
Furthermore I never even noticed the M when checking my laptop specs so again, sorry for the inconvenience I must have been half-cocked for a year.
.

I applied all the configs that user throughout this topic said that will work great with 4200U, so I applied a config based on the wrong logic.

If Lenovo is doing this it's really not OK.

My temps are usually fixed at 88 degrees when I am gaming which is 3 degrees more than that limit and it is pissing me off that I am unable to play games for more than an hour (max) at lowest settings and lowest resolution. I can run crysis 2 on medium with no problem but even battlefield 3 will skip an occasional framerate on low 720p settings after 40,45 min.
I consider myself to be maybe a bit too regular about the condition of the laptop. I am opening it every 4 months and cleaning the fan and the paste. It is always connected to the cooling pad, all the settings of my GPU and games are optimized, defragmented, are running with a booster and that makes everything smooth and boosts the FPS level for 15-20 fps when all is done right.

So, you know, I prefer Lenovo but this is batshit crazy, if my limit was 100 degrees this would be a really nice all around machine.

Thank you for the reply and I will see if there is any solution for this is posted itt, web or really just anywhere.

Also, would like to know is it possible that throttlestop will find a solution to this problem in the near future?

I saw that when talking about the power limit problems of 4200U you said the same exact thing : " the throttlestop can't do nothing about it" but as we can see some users are gladly reporting that the powercut feature is making their systems stable.

I don't mean to hold on to your oppinion, I am just wondering should I give throttlestop an occasional check or should I just be reconciled with the fact that this is the best I can get.

 

Hello everyone, I'm new to Throttlestop and would like to use it to undervolt my CPU on my MSI GS43VR. The CPU is a 6700HQ (dGPU is a GTX 1060). I have read over some info in this thread and elsewhere, and I found this guide on how to use Throttlestop to undervolt the CPU: http://www.ultrabookreview.com/10167-laptop-undervolting-overcloking/

Is this a good guide to follow? Any other advice before I get started? Based on what I've read, it looks like -150 mv is a good place to start on the core and cache, though not sure about the iGPU.

Thanks for any advice you can offer!

 

So I'm running a windows 10 wint 8.10 and I can't seem to get it to minimize to tray. From what I'm reading this is possible. The tray icon shows up but it just minimized like any normal app.


*Edit, after searching more I saw mention of the task bar check and it worked! Sorry for the post.

 

@unclewebb : I found out that a lot of weird issues I was having in my SP4 were due a too aggressive undervolting config. I always believed that the only risk was getting a BSOD, but I also found that (at least in SP4 case) sometimes it would not get out of deep sleep / hibernation state, and even Windows hello was sometimes refusing to log me in after resuming from hibenartion. After modifying a bit the undervolting settings I was able to make it stable (at least so far!). If other posters are having weird issues with their Surface (not BSOD) check your settings as well. In any case, thanks a million for taking your time writing here and for this amazing tool!

 

I have a Thinkpad L450 with a I5-5200U running Windows 10, and even though I set everything in bios to high perforamnce and the power profile in windows to high performance it stayts at 0.77 Ghz on Battery. when plucked into AC it works fine and is much faster

I even tried running prime to force some turbo, but it stayed the same https://dl.dropboxusercontent.com/u/19153690/turbo.png

This is what throttlestop shows

https://dl.dropboxusercontent.com/u/19153690/throttle.png

Anyone know what I should do ?

 

-150 mV would be a great place to finish but it is hardly ever a good place to start. I like to start at -50 mV. Some CPUs might be able to run reliably at -150 mV but most cannot. I prefer to start with a small under volt, do some thorough testing and then reduce it further if my computer is running reliably.

Have you ever thought that maybe the reason your CPU runs so slow when on battery power is because Lenovo is trying to protect the battery from being damaged? Perhaps their testing showed that battery failures would be too high if they allowed the CPU to run at its full rated speed when it was not plugged in. Before disabling anything, it is always a good idea to think about why a manufacturer has gimped a laptop.

Now that you know the risks, have you tried clearing the BD PROCHOT box? That is a common throttling method that Lenovo likes to use. Have you gone into the FIVR window and set the Non Turbo Ratio to 1?

Using Prime to test a low power U CPU, especially on battery power, is not a good idea. This load can overwhelm one of these CPUs. For testing purposes, why not try running a single thread of the built in TS Bench test. Many U CPUs will not run at their full rated speed when they are fully loaded. Intel designs this line of CPUs to throttle when fully loaded and they do a very good job at that.

 

ThrottleStop 8.20
Papusan Edition
September 13, 2016

https://www.sendspace.com/file/c5qet1

New Features
- integrated Limit Reasons into TS and added Skylake support.
- added Min / Max package power reporting.
- added Intel Speed Shift adjustment for any OS.
- improved BCLK and multiplier reporting for Skylake CPUs.
- improved Windows 10 icon compatibility.
- initial Kaby Lake support.

For best results when using Limit Reasons, exit HWiNFO.



Speed Shift is a new Intel Skylake feature that reduces the multiplier when the CPU is lightly loaded. This is similar to the Windows Balanced power profile but because this is implemented in hardware, it allows the CPU to get back up to full speed much quicker. Until now, Speed Shift was only available in Windows 10 version 10586, but if you have a Skylake processor, you can use ThrottleStop to enable Speed Shift in any version of Windows.

Speed Shift takes over control of the CPU multiplier so if Speed Shift is enabled, the ThrottleStop Set Multiplier and Power Saver features will no longer work. As soon as Speed Shift is enabled, it is automatically locked in the enabled position so you will need to reboot or perhaps use Stand By mode and resume to reset the CPU. This means that if you are using Windows 10 v10586, there might not be any way to disable Speed Shift.

After you boot up in Windows 10, ThrottleStop might show that Speed Shift Technology is already checked and enabled. ThrottleStop adds access to the Minimum and Maximum multipliers that are available when Speed Shift is enabled so this might help users gain some control over their laptops. This is an experimental feature in ThrottleStop that works great in Windows 7. Setting the Min and Max to the same value as your highest multiplier should disable Speed Shift and allow your CPU to run at full speed regardless of load, similar to the Windows High Performance power profile. Setting the Minimum multiplier to something like 8 would be the equivalent of the Windows Balanced profile. I have not yet tested this in Windows 10 so any feedback about Speed Shift would be appreciated. For Windows 10 users, I might have to add some more code to ThrottleStop so it keeps a close eye on the Min / Max register. I won't be too surprised when some manufacturer decides to set the Maximum multiplier in the Speed Shift register to 8 when running on battery power.

 

Thanks @unclewebb
And I realy love the new TS 8.20 version's name Rep added

 

So far, so good. Another excellent product. Thanks for this.

Now I need another Skylake system to push through the paces.