The ThrottleStop Guide

Working fine w/ Build 17134.1, RS4 RTM candidate (?).
Disregard *C8*...experimental sBIOS.

 

so what can i do to reduce voltage to gen 2 i7 please.....need to run the quadcores cooler, thanks

 

As soon as you exit ThrottleStop and reboot, your CPU will be back to its default settings. No need to uninstall ThrottleStop. Do not run ThrottleStop if you do not want it controlling your CPU.

You cannot do anything. Voltage control was not possible until the 4th Gen Core i CPUs were released.

I do not own an 8th Gen laptop so it is difficult for me to fix problems like this. It sounds like Lenovo is using a driver that writes EPP information to the CPU faster than ThrottleStop does. You need to find and disable this driver. Without modern hardware to play with, I have no idea where to start looking.

 

Also if a task is started from windows login, we cannot see the temp and task from the taskbar?

 

Follow the guide in the second post of this thread to start ThrottleStop with Windows.

http://forum.notebookreview.com/threads/the-throttlestop-guide.531329/#post-6865107

To see temperatures in the system tray, you need to use the option, "Run only when user is logged on". If you run ThrottleStop before a user has logged into his account, ThrottleStop will not have any place to put the temperature icon.

 

What could cause an undervolt set by Throttlestop to reset? My Throttlestop runs at startup to set the undervolts, and then closes. The undervolt usually has always persisted, but over the last week or so it will randomly reset to 0 and I haven't found a pattern as to when/why. Any ideas?

 

How about leave TS running? It is an extremely light weight app considering what it is capable of.

Do you have or did you have Intel XTU installed? Even if you removed XTU, there still might be some remnants lurking. Have a look in the Task Manger for anything XTU related. What program are you using to monitor voltages after TS closes?

 

There are a few potentials... "lenovo system interface foundation", "intelligent cooling", and the intel DPTF. They are only visible under system devices, probably to make it harder to catch and uninstall them.

 

I never had XTU, and I use HWInfo64 to monitor voltage as it shows the offset. The way I realised it was being reset is when I was playing a game and it slowed down massively, then I saw my CPU approaching 100 C. Checked HWInfo64 and the undervolts were all zero.
Sure I have no issue leaving TS running, just curious why this started happening when it has worked fine for years previously.

 

Reaching this temperature will always cause all kinds of problems [Including resetting your voltage] so... fix your main cause first which is your temperature and then.. everything will be fine

Remember high temperature will always be your main or major enemy so... know your enemy first and then eliminate

 

Sorry for asking this again.
Is it right when change EPP to 180 (for example) in Battery Mode and see FIVR, it's still show 127?
Even in three Power mode except Performance mode, EPP change to 84.

And of course ThrottleStop running well with Task Scheduler.

I'm on Windows 10 Final build RS3

 

The reason it is reaching that temp is because the undervolt is resetting With my undervolt it usually maxes in the 80s. My original question was about figuring out why the undervolt is resetting in the first place.

 

Hi,

I was using Throttlestop fairly successfully but now i've come across a bug.

So i managed to undervolt by 0.1v, and all was working fine. IN my testing i pressed "reset voltage", and for some reason it overwrote my the BIOS's default PL1 to 8w instead of 44w.
This meant that everytime i hit max clockspeeds for just a few seconds, it will thermal throttle (due to power limit).

I have tried deleting the .ini file and restarting, the setting seems to be stuck in the bios somewhere.

I only found out about the setting by installing XTU, which is a problem because everything was working fine until the setting crapped itself. I believe when i got the laptop at stock, the setting was 44W. Some amount of tinkering in Throttlestop set this to 8W in the CMOS/BIOS. Now if i uninstall XTU and Throttlestop, the default is 8W, meaning i can't boost ever again. The only way to boost is to run XTU and set it back to 44W. How do i set the default back to 44w in the bios so i am back to stock configuration?





Will resetting CMOS work? this is a laptop btw.

I can't change the "Turbo Boost Power Max" in ThrottleStop.

 

Oh ok hmmm... have you tried less undervolt ? maybe your undervolt is unstable which leads to resetting.. I'm not sure so.. it won't harm trying lesser undervolt

 

Seems like it was caused by power state changing (AC/battery or wake/sleep) I changed my task to run on these triggers as well so the undervolt is always reapplied. All good now.

 

Glad to hear that is fixed

 

Post some pictures so I can see your problem and see how you have ThrottleStop setup. In some versions of Windows 10, the operating system might control EPP so ThrottleStop might not be doing anything.

ThrottleStop does not interact with your bios. This means that anything you do in ThrottleStop should not change any setting in your bios. Is it possible that you updated your bios recently?

Your XTU screenshot shows that the power limits in the Active profile are both set to 44.000 Watts.

 

By BIOS i mean "magic setting in somewhere that stays across reboots." It appears somewhere there is a "safe value" and "current value". The "safe value" has been overwritten somehow to 8w. I can change the "current value" to 44w which is correct, however i can't change the "safe value" back to 44w. The safe value definitely was 44w at some point.

Nope, i've only used this laptop for 3 days. I was testing undervolts, and it was stable at -0.09v, no throttling for at least 5-10 minutes.
Then i tried to cap clocks to 3.2ghz instead of 3.4ghz. It would instantly (8-10 seconds) throttle due to "PL1".
After this change it kept throttling due to PL1 (cpu temps only 50-60c).
XTU had not been installed at this point.

Yes, XTU can effectively change the power limit *back* to 44w, but i have to open XTU. If i restart the computer, it 50% chance changes back to 8w.
XTU Knows the correct value SHOULD be 44w, but the Default profile (which cannot be modified) is 8w. If i uninstall XTU, it sets it to 8w.
Basically this 8w thing has stuck *somewhere*, and it definitely used to be 44w. Also Core voltage offset/cache voltage offset are also "stuck" at -0.09v.

Any hints?

 

That is either a problem with your bios or with XTU.

I do not know of any magic setting anywhere that stays across reboots. Are you familiar with the Windows hybrid boot feature? When this is used, it is possible that your bios is not resetting your CPU to its default specs like it is supposed to do. To fully shutdown Windows 10, hold the Shift key on the keyboard down while you select Power - Shut down.

ThrottleStop does not show or allow you to access any sort of "safe value". I have no idea if, or where this might exist. This is XTU, not ThrottleStop, that is showing you this info.

I do know that a Core i5-8250U has a default TDP value of 15 Watts. It also has a Configurable TDP-down setting of 10 Watts and a Configurable TDP-up setting of 25 Watts.

https://ark.intel.com/products/124967/Intel-Core-i5-8250U-Processor-6M-Cache-up-to-3_40-GHz

ThrottleStop is correctly reading these values from your CPU. The first time you run ThrottleStop, if it does not find a ThrottleStop.INI configuration file, it creates a new one. For default values, TS reads the long and short turbo power limit (PL1 - PL2) values from your CPU. These values are whatever turbo power limit and voltage values that the CPU is currently using. If ThrottleStop initially read 44 Watts for PL1 and PL2; it is because your bios must have set your CPU to these values. These are not the correct default values for an 8250U.

ThrottleStop does not write any values to your bios, ever. It does write power limit information to registers within your CPU and if you do a Windows hybrid reboot and your bios does not reset these values, perhaps it is possible that an adjustment you did in ThrottleStop could survive a hybrid reboot. I have never tested for this.

To try to get back to square 1 and to try and troubleshoot this problem, I would delete XTU and I would delete the ThrottleStop.INI configuration file. I would then fully shutdown Windows by holding the Shift key. After this, if you can remove your laptop battery, I would do that too. Unfortunately, many laptops these days prevent easy access to the battery. Even if you cannot remove the battery, the CPU should be at default specs when you start back up. At this point, go into the bios and see what settings it is using. When you boot up, start by monitoring your CPU with HWiNFO64 and see what it shows for a baseline. Run ThrottleStop, let it create a new INI config file and see what it shows.

Do this whole process again but instead of running TS, install and run XTU instead. Make sure that no XTU remnants were left behind by the previous install. I have no idea where the 8 Watt value is coming from. Hopefully you get lucky and can track it down.

 

Thanks,
I didn't know about Win10 hybrid reboot.
The battery is not easily accessible but i'm replacing the harddrive with an SSD later this week, so i'll detach the battery while I'm at it if absolutely necessary.

I'll try doing the steps that you stated to try and get it back to a completely stock configuration (which is what i'm after, since i know from stock the steps i can do to get a stable undervolt).

Just confirming - if it has a TDP-up of 25w, and at 100% load i'm only using 20w @ 3.4ghz due to undervolt, i should be able to run at max clocks indefinitely right?

Also what is the relationship between

• (PL1, PL2),
• XTU's (Turbo boost power limit max, Turbo boost short power limit max)
• ThrottleStops (TDP Level 1, TDP Level 2)
• ThrottleStops (Package Power Long, Package Power Short)

Just trying to figuring out how to verify that PL1 and PL2 are set to the right number (anything over 25w) rather than 8w in ThrottleStop.

 

Most recent Intel CPUs have 2 power limits that control when the CPU can use turbo boost. By default, there is a long term power limit which the CPU can run at indefinitely. There is also a short term power limit so the CPU can run at a higher power limit for a short period of time. The turbo time limit determines how long a CPU can run at its (higher) short term power limit before it will be forced to throttle back to its long term power limit.

Intel typically recommends that the long term power limit be set to the same value as the rated TDP. For most U CPUs, that is 15 Watts. Intel also recommends that short term limit be set 20% to 25% higher so that would be somewhere around 18 to 20 Watts. Some might even go as high as 25 Watts. With 8th Gen U CPUs, some manufacturers seem to be going way beyond these Intel recommended limits. Setting both of these to 44 Watts should allow the CPU to run at maximum speed as long as the cooling system is adequate.

I have not played around with an 8th Gen U in Windows 10 but I believe the new Windows slider that lets you adjust the performance level might be tied to the TDP-up, TDP-down values. For example, when switching to battery power, a manufacturer might decide to switch the CPU to TDP-down mode. A lower maximum power limit would help extend the battery run time as well as protect the battery from being damaged. Drawing too much power out of a battery too quickly is usually not good for a battery's long term health.

In the ThrottleStop Limit Reasons window, PL1 is the long term power limit, also known as Package Power Long in ThrottleStop. In XTU I think this is called Turbo Boost Power Max.

PL2 is the short term power limit, also known as Packgage Power Short in ThrottleStop. In XTU I think this is called Turbo Boost Short Power Max.

Here's where the whole mess gets really confusing. There are multiple or duplicate power limits that control the CPU. ThrottleStop only has access to some of these power limits. On some devices, you are forced to use Intel XTU to get access to some of the power limits. I think there are also power limits that XTU doesn't even give you access to. It's a mess. The publicly available documentation for this is non existent for small time developers like myself. ThrottleStop tends to be more efficient and more consistent compared to XTU so when ThrottleStop allows you to fully control your CPU, I would go with that. There are other situations where ThrottleStop will not give you full control of your CPU. In that situation, you might be forced to use XTU to get access to more of the power limits as well as the IccMax settings. A lot of this depends on what limits an individual manufacturer decides to set in the bios. Some limits are not used or deliberately set sky high so they do not cause any throttling and interfere with performance.

If your CPU could be permanently held in TDP-up mode with its 25 Watt power limit then yes, you should be able to run at full speed at 20 Watts indefinitely. Alternately, if you could use your bios or software and you set both of your turbo power limits to 25 Watts then your CPU should be able to run at full speed indefinitely. With multiple power limits and IccMax (current) limits, trying to figure out what limits a manufacturer is using and what limit is the one doing the limiting can be a bit of a guessing game. The combinations are endless.

Almost forgot. The different TDP Levels can use different non turbo multipliers. ThrottleStop reports these. Default appears to be the 16 multiplier, if the CPU goes into the higher power TDP Level 2, the default non turbo multiplier goes up to 18 and in the lower TDP Level 1, it drops down to only 8. CPUs getting stuck in the lowly TDP-down mode, slugging it out at 800 MHz for long periods of time, seems to be a thing of the past.

 

Yes, XTU has no access to PECI Power limits.
These are like "ring 0" to the operating system in terms of priority, and only the Embedded Controller has access to PECI power limits. It doesn't matter whether you "disable" PECI in the Bios--that has no effect on what the EC can access. PECI overrules everything, Bios and MMIO. And only an EC hack can avoid that. And hacking the EC without knowing checksum correction and algorithms= brick.

 

Thanks for the info UncleWebb.

Unfortunately Shift+shutdown didnt do anything.
I'm sitting at 8w for PL1, and the PL2 time is around 8 seconds...

I'll have a go unseating the battery when i repaste/change to ssd. Or i guess i could just leave it, i doubt having 2.2ghz vs 3.4ghz has any real impact on anything i actually do with this laptop. I dont want to install XTU because it doesn't stick its settings and it takes forever to start.

 

Have you tried click reset to default in bios, reset NVRAM(look after how it’s done on your notebook), re-flash same bios version or check if a new bios is released.
Even make a XTU Power profile test and then uninstall the correct way. Be sure you have uninstalled all tweaks/Oc software before you start.

 

I've tried click reset to default in bios, no dice. I'm guessing re-flashing bios would work, but i can't figure out exact bios for my computer, and don't want to flash and brick it (since it's brand new....) (Laptop is Asus f510ua, bios presents it as Asus X501UAR ver 3.03, website only has ver 3.01 or X501UA ver 3.04)

I've tried fiddling in XTU. XTU's "default value" is 44w (which is fine), but the "default profile" is 8w. Basically it half-knows the 8w value is bogus. Uninstalling XTU just sets it back to 8w.

I think re-flashing bios or pull battery are next steps, however i can't find the right bios version, so pull battery it'll have to be...

 

Ahoy!

I've come here after getting a less than desirable answer from intel.
https://communities.intel.com/message/538691

I have a razer blade stealth with an i7 8550U that I have undervolted. The problems I'm having is with increasing the wattage. Increasing the wattage with XTU or Throttlestop doesn't actually increase the turbo boost wattage. The bios also doesn't have any options to raise the wattage of the turbo boost, just a toggle to disable it. I was wondering if this means that it is locked down at a bios level and if it requires a bios mod as well as how to mod the bios exactly.

 

Just suggesting you to check your processor speed by Userbenchmark: http://www.userbenchmark.com/

Download "UserBenchMark.exe" and run it. I have a feeling that speed will be on the top when compared on others with the same CPU.

By the way, if you have i5-8250U CPU, then it might state that "CPU throttle at 88 by Windows" (it might be Intel limitation, as I can still get very top speed results for that CPU).

By the way, your bios 3.03 might be removed, as it has Intel first microcode for Spectre. There is not a new microcode bios available for Asus F510UA (X510UAR) yet.

 

Alright, i managed to magically fix it (but i don't know how!)

I didn't have a set of tweezers so i couldn't disconnect the battery.
When i changed my OS to the SSD (using Macrium reflect), it booted once and then i turned on hibernation and then it stopped booting (windows failed to boot).
While it was booted, i installed XTU and set the values back to (PL1) 15 / (PL2) 25. After this the system never booted again.

With a great sigh, i finally just reinstalled windows from scratch (there was nothing installed anyway). Took around 20 minutes.

Finally, i reinstalled Throttlestop (no XTU this time), and it correctly used PL1 (15) and PL2 25, which is probably what it was set at when i received the laptop last week.

So the fix was probably a combo of installing XTU, changing settings and then uninstalling windows (when you un-install XTU it stuffs it up again). removing the battery probably also would have worked but i couldn't do that

Yes I tested this the first day i undervolted. I was in the 100th percentile from 80mv undervolt. The test only runs like 20 seconds, so all you have to do is make sure your boost is 3.4ghz the entire time and you'll score the highest possible score for this CPU (disregarding overclockers who go above max boost). When i hit the 8w bug (PL1 kept being set to 8w), i was getting 22nd percentile, obviously due to it downclocking to 2.2ghz.
New tests (after ssd install etc):
i was getting 82nd 84th percentile for a while, realised i was on "better performance" rather than "best performance". Changed to "best performance and got 98 percentile immediately.

Not quite 100th percentile but maybe people have started overclocking to 3.5ghz.

If i disable PL1/PL2 (or set them to at least 25w), i can easily sit at 3.4ghz, 90°C indefinitely (with undervolt). 20.5 W package output.

Thanks. Well my problem's fixed so not gonna touch bios.

 

First, are you doing it right in XTU? Set PL1 and PL2 (Turbo Boost power Max and Turbo Boost short Power max) to say 50w. Set windows power settings to High performance. Finally, run any benchmark that will load your cores. After "Turbo boost Timer power window" seconds, if it goes down to 15w, then it means you'll probably need to mod your bios. Lets see a screenshot?

 

@XeaLouS Can you guide me too how to setup my ThrottleStop? I already experienced 11 BSOD (because everytime I open ThrottleStop BSOD triggers) and also experienced missing WinRing0.dll but luckily I have create a restore point before I've done it so my laptop runs normally now. I'm trying to redo again what I've done but uninstalled XTU first and MSI Afterburner so there will be no conflicts. And I saw this thread and saw your posts that you successfully used ThrottleStop on your i5-8250U so I'm hoping you could help me too.

The reason I want to use ThrottleStop because I have this CS:GO wherein even I lower or set my graphics settings to High, I still get the same avg. FPS. Please help me.

 

Have you read the full guide yet?
https://www.notebookcheck.net/ThrottleStop-Primer.213140.0.html

First thing you want to do is delete Throttlestop (or at least the ThrottleStop.ini file), redownload it.
Completely shut down your computer (shift + shutdown button).
Finally, open Throttlestop and check the settings in FIVR - make sure the undervolt is 0.000v for everything. If everything is 0.000v that means your Throttlestop reset correctly. If not, set them all to 0.000v. Finally, close FIVR, press "Turn On", go back into FIVR and adjust your undervolt until satisfied. While adjusting, run a benchmark. The TS Benchmark is good enough.
After testing, have a look to see if the cpu hits PL1 after 28 seconds.
You can do this with the included TS Bench 8 thread 1024M test. Look at GHZ, does it drop from 3.4 to 2.xx after a while, but never hit 100c?
If this is the case, you need to adjust PL1 and PL2 ("package power long" and "package power short"). Note that PL1 and PL2 sometimes can't be adjusted in Throttlestop - changing the number does nothing.
On my laptop, Throttlestop can't change PL1 and PL2, i had to use XTU. I'm happy with the defaults for my 8250u (25w for 28 seconds, 15w for long term), as it throttles to 2.9ghz which is fine for me.

For CS GO, do you know how to properly increase FPS? have you got vsync disabled, multithreading on? Are you using integrated or MX150?
Are you sure the bottleneck is CPU? It could very well be the integrated graphics...

 

Hi @unclewebb. I am able to use Throttlestop on my Win10 i5 4210U machine to undervolt as well as and circumvent TDP throttle via Powercut hack. This is great for video effects which utilize the entire die.



However, I am having trouble making the powercut "persist", it appears to turn itself off without any reason. That gives me the TDP throttle again.


Unfortunately, to "reset" this reversal, I have to restart. Waking up from sleep is one of the triggers for reversals I have identified. Overheating is ruled out.

Why is it so? Any help stopping the reversal?

 

Thanks for the reply. First of all it looks like this computer only has a balanced option for some reason, but I have changed the settings of it to be more like what "high performance" would be. I increased most of the settings, but I think this one is the most relevant one.

I set it to 35 watts in xtu (because I'm afraid of going too high if it actually worked this time) and hit apply.

After the 28 seconds of PL2 state was done it settled into the PL1 state. The TDP seemed to be ranging between 13 and 17 watts so it seems like it was trying to settle at 15 watts. The fan was barely spinning so the thermal headroom is pretty high after my undervolt and liquid metal thermal paste application I'm sure 25w would be nice if I can change the PL1 state.

It really seems to me that it is a limitation associated with the bios that does not have an option to change. I have dumped the bios (that is american megatrends using AFUWINGUIx64.exe) and tried the bios modding tool (AMIBCP.exe), but I have no idea what I'm doing and it doesn't look the same as guides I have looked at online.

If anyone knows anything about editing a bios please show me the way. I will include a dump of the bios in case anyone wants to take a look.
https://drive.google.com/file/d/1FUK0_o3r7zjPfLrq0jOjwIqqXPgYK6c0/view?usp=sharing
BTW sorry for the late reply
EDIT: in bad at adding images it seems to work if you right click them and open in a new tab

 

I know I'm a bit late to this party, but does Core 2 Quad mobile not support SLFM? I'm trying to get voltages lower than 1.05V

 

@ XeaLouS Where can I see this? Is it under the TPL?

As per CS:GO, I have done everything I can, configured nVidia to maximum performance, lowered my settings, never been enabled v-sync and multi threading is always on. Even from HIGH settings and low settings, I still get an avg FPS of 60.

 

@XeaLouS It throttles and doesn't even run at 3.4

Here's the image.

 

Yes, you are correct. PowerCut will reset when you resume from sleep.

When I added PowerCut to ThrottleStop, I thought it was a great feature but users were not very interested.

PowerCut needs to be enabled at just the right time when the processor is idle. When resuming from standby, the processor is not idle. PowerCut could happen at the wrong time when power consumption is high. This would cause the CPU to constantly throttle. I was not sure how to write code to do this reliably so you will need to enable PowerCut manually after you resume.

The Core 2 Quad does not support SLFM. Page 10 of the Core 2 Spec Update document does not list an SLFM speed for the QX9300.

https://www.intel.com/content/dam/support/us/en/documents/processors/mobile/celeron/sb/320121.pdf

ThrottleStop shows that your CPU is running at 14.9 Watts or just a hair under the 15 Watt TDP limit. If adjusting the power limits in ThrottleStop or XTU do not help then long term, your CPU is probably going to be stuck at that limit. There are multiple power limits and software cannot get to all of them. Technically you bought a 15 Watt CPU and unfortunately, it is running exactly as Intel intended. Intel designed their U series to slow down so they do not exceed their 15 Watt TDP rating.

 

My personal experience with PowerCut on my previous Haswell-based notebook was that while it allowed the CPU to report an abnormally low package power, it could not fix the EDP throttling of CPU during GPU load because that was a more insidious form of throttle. In my case, it was the EC (embedded controller) firmware that was responsible for the throttle, and I needed a modded EC to overcome it.

Unfortunately PowerCut no longer works on post-Haswell CPUs, so the interest has dropped off. Nowadays, we need an unlocked BIOS with the ability to adjust IMON Offset in order to trick the CPU into reporting a lower-than-actual package power draw. And that's still no guarantee as TDP throttle is far from the only type of throttle these days.

 

Thank you for your response. My problem remains. After resuming from sleep, I am able to get FIVR to lock VCCIN and display PowerCut status as 'Enabled' but I am still not able to stop the power measurement, as you can see in the screenshot, power is being accurately reported and TDP throttle is active despite PowerCut

To reset this I have to full restart, and then it works again!

 

You need to understand that PowerCut takes advantage of a bug within some 4th Gen CPUs. Intel released the 4210U one year after my 4700MQ was released so it is possible that Intel partially fixed this bug or this bug was fixed with a microcode update. After resuming from standby, your CPU is now running normally. There is nothing I can change in ThrottleStop to create a bug that Intel has fixed if that makes any sense.

I will go test my 4700MQ. I am pretty sure that on my early 4th Gen Haswell CPU, PowerCut continues to work OK after resuming from standby.

Edit - I can still enable PowerCut after I resume from standby. Too bad that this no longer works on your 4210U.

 

Ah, guess my luck has run out. Ok, I will circumvent the problem by not sleeping. At least I have reassurance now. Thanks again!

 

@unclewebb is there no way i can fix this? it only stays now on 1.8GHz unlike last few days before applying these it runs at 3.38 GHz.

Here's the image.

is there no other ways to unlock it's TDP?

Please tell what I can still do. all I want is to run my cpu at constant 3.38GHz when working and when in idle or light work, it will

EDIT:
I tried to use Intel's XTU and it shows that my CPU can burst up to 44 TDP. My question is, why XTU detects that I can burst up to 44 TDP but it limits on 15? I don't understand, please enlighten me. Here's the image from XTU.
EDIT 2:
I have another question, does speedshift will help to help cpu to run at constant, at least, 3.38GHz?

What will happen if I increased non-turbo Ratio?

 

What were you doing a few days ago? When was it running at 3.38 GHz. An 8250U has a TDP rating of only 15 Watts. Some people are lucky and they can use ThrottleStop or Intel XTU and increase this limit so the CPU can run well above 15 Watts. Other people are not so lucky. Your CPU is throttling and slowing down to prevent the CPU from going over 15 Watts.

Do not run XTU and ThrottleStop at the same time. Try uninstalling both programs and then when testing, only run ThrottleStop or only run Intel XTU. Uninstall XTU before running ThrottleStop. Try setting both power limits to 25 Watts. If long term you are still limited to 15 Watts, there might not be anything you can do without a modified bios. Some laptops are limited by the manufacturer.

Changing Speed Shift or the Non Turbo Ratio will not make any difference. Your CPU is throttling because of the 15 Watt power limit. Open up the Limit Reasons window and it should show you what is causing the throttling.

Intel CPUs have a long and a short term power limit. For a short period of time, your CPU might be able to use a 44 Watt TDP limit but after a while, the 15 Watt limit will take control of your CPU and slow it down so it does not exceed 15 Watts.

 

Hello Unclewebb, I'm wondering if it might be possible to make a small script which enables speedshift, without using other aspects of your program which seems to change turbo behavior on my kabylake-r laptop. Your option to enable speedshift in throttlestop, does that use the driver that you use for other features? How is it done?

 

Speed Shift is well documented in the Intel publicly available docs, Volume 4. This is also known as HWP which I think stands for hardware P-States.

https://software.intel.com/sites/default/files/managed/22/0d/335592-sdm-vol-4.pdf

Writing 1 to Model Specific Register 0x770 will enable Speed Shift. The problem is that the only way to access a MSR in a Windows OS friendly way is to use something like the WinRing0 driver which is no longer supported.

What sort of turbo behavior is ThrottleStop changing? Be as specific as possible. Are you using ThrottleStop along with XTU at the same time? When properly setup, it should be possible to run ThrottleStop without it changing anything too important. Help me out with this. If I cannot find a way to adjust ThrottleStop so it does not screw up your turbo feature then I will write a simple Speed Shift On program for you that you can run from any script but it would be much less work for me if we can get ThrottleStop to do this for you.

@selfassembled Edit - I found and re-read your previous post.

http://forum.notebookreview.com/threads/the-throttlestop-guide.531329/page-764#post-10701711

I am a smart guy but my memory is terrible. Too much time in the forums.
Based on that it looks like I will have to write a quick and simple enable Speed Shift kind of program for you. Maybe next week.

 

Correct me if Throttlestop doesn't have this behaviour but is there any way to get a version or make Throttlestop versions never 'expire'? I want to set up my old laptop which - because of cpu whine - has Throttlestop installed. It's for a family member and I can't imagine them ever being able to update Throttlestop so I would to just make the program 'static'.

 

This is at the top of my things to do list. Check your messages for more details.

 

http://forum.notebookreview.com/threads/why-does-the-8250u-require-such-a-high-voltage.815154/

I graphed the power consumption with different clock speeds. After a turbo clock after 2.3GHz you get more power consumption, and it becomes less efficient. Personally, I don't see why you'd want your CPU to run at 3.4GHz. A 15W TDP limit IIRC gives a Passmark CPUMark score of 7000, but if you raise the power limit to 45W the CPU can constantly run at its maximum turbo 3.4GHz. Most of the tests run with the CPU drawing 25-35W. So, 200% the power consumption for a 130% the performance.

Especially with your cooling, I wouldn't recommend changing the power limits. I doubt your laptop would be able to sustain 30W without thermal throttling. Having a 15W CPU run at 73C is a sign of poor cooling. My 8250U sustains temperatures of under 53C under a 15W TPL. If you really want to, I'll give you a link to changing the TDP

 

ThrottleStop 8.60
https://drive.google.com/file/d/1RLAhyEY6wRDgkOHwCSD7Ls5j9Uk9ZxEj/view?usp=sharing



New Features
- Papusan inspired small footprint edition.
- compatible with Windows 10 April Update, Version 1803 Build 17134.1
- removed expiry date.
- redesigned TS Bench test.
- compiled with Visual Studio 2013.
- Microsoft vcredist_x86.exe download link included if needed.
- re-release of previous ThrottleStop 8.50 with expiry date removed.

If you try to run ThrottleStop and you get this error:



You will need to download and install the vcredist_x86.exe redistributable package from Microsoft.

https://support.microsoft.com/en-us/help/4032938/update-for-visual-c-2013-redistributable-package

 

Thank you!

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