Optimal settings for the intel Core-i7 8550U CPU?

[pjl321]

You have your power limits set backwards. Setting Long to 17 and short to 44 makes sense. The way you have these set makes no sense.

For a short period of time it is OK for the CPU to use more power. After 28 seconds (the turbo time limit), it is OK for the CPU to go to a lower power number. The Long power limit should always be less than or equal to the Short power limit.

Typical values for your CPU are Long = 25W and Short = 44W.

Setting all of the turbo ratio limits to 40 will not accomplish anything if this CPU does not support that request. Set these back to their default values. You cannot overclock a locked CPU. TS 8.74 will show you what the default turbo ratio values are.

I would clear the BD PROCHOT box in ThrottleStop. Your CPU will thermal throttle to protect itself whether this box is checked or not. Thermal throttling is controlled by the PROCHOT (processor hot) signal. It is not controlled by BD PROCHOT.

Make sure you are using the FIVR - Disable and Lock Turbo Power Limits feature. You will need to install the RwDrv.sys file into your ThrottleStop folder. The Install button beside this feature explains this. You can download the necessary file from Mega.

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sorry to bother you, I have the same CPU but don't seem to be able to gain any control, everything is greyed out. Is that something I am not doing right or have HP locked it or is that this plundervolt update???Thanks for your help.

 

[unclewebb]

have HP locked it or is that this plundervolt update?

Yes and yes. Many laptops have had a Plundervolt update which locks out CPU voltage control and it also locks out the turbo ratio limit adjusters.

You need to modify the BIOS to unlock these features. I am not sure what is possible on your HP laptop. Here is the method that works on many Dell laptops. Check out the Notebook Review forum. Someone with your laptop model might have come up with a similar solution.

Undervolting 2020 Dell Laptops like the Vostro 7500 and More Tips to Improve Thermals, Battery Life, and Speed - Brendan Greenley

2021 Update: Based on post and Reddit comments, the approach to unlock undervolting works for a number of models, including the XPS, Inspiron, G5, 11th Generation Intel processors, and 2021 Dell models and other lines. If it works for you, please leave a comment below so others may know...

brendangreenley.com

 

[pjl321]

Yes and yes. Many laptops have had a Plundervolt update which locks out CPU voltage control and it also locks out the turbo ratio limit adjusters.

View attachment 226340

You need to modify the BIOS to unlock these features. I am not sure what is possible on your HP laptop. Here is the method that works on many Dell laptops. Check out the Notebook Review forum. Someone with your laptop model might have come up with a similar solution.

Undervolting 2020 Dell Laptops like the Vostro 7500 and More Tips to Improve Thermals, Battery Life, and Speed - Brendan Greenley

2021 Update: Based on post and Reddit comments, the approach to unlock undervolting works for a number of models, including the XPS, Inspiron, G5, 11th Generation Intel processors, and 2021 Dell models and other lines. If it works for you, please leave a comment below so others may know...

brendangreenley.com

Great, thanks. I have asked HP for an older BIOS so I can flashback to pre-Plundervolt 'fix'.

Out of interest, and I assume the answer is no but then I also know there are a lot of very clever people out there but, is there any way to increase the 'turbo boost power time window' to basically forever? I can see it can be changed anything up to 128 seconds but why not 200 seconds or a million seconds...? As long your cooling is up to it and you're on mains power then why could this not be a thing?

 

[unclewebb]

You an use ThrottleStop to request a turbo time limit of up to 45 days. Most CPUs will ignore this request. Intel shows 448 seconds is the maximum for some of their CPUs but even this is overly optimistic.

Most desktop motherboards let you set the PL1 and PL2 power limits sky high to 4095W so they never cause any power limit throttling. This is possible with some laptops. Other laptops have a fixed limit equal to the TDP. This is 45W for many Intel H series mobile CPUs and the time limit might be hard locked to 28 seconds or less.

Manufacturers like fixed power limits. This allows them to ship laptops with small, barely adequate power adapters.

 

[pjl321]

You an use ThrottleStop to request a turbo time limit of up to 45 days. Most CPUs will ignore this request. Intel shows 448 seconds is the maximum for some of their CPUs but even this is overly optimistic.

Most desktop motherboards let you set the PL1 and PL2 power limits sky high to 4095W so they never cause any power limit throttling. This is possible with some laptops. Other laptops have a fixed limit equal to the TDP. This is 45W for many Intel H series mobile CPUs and the time limit might be hard locked to 28 seconds or less.

Manufacturers like fixed power limits. This allows them to ship laptops with small, barely adequate power adapters.

I think I will just build an Alder Lake desktop system, it would be so much faster and I hardly ever work away from my desk anyway.
Thanks for all your help, have a great day.

 

[Michael19264]

I am not responsible for any damage done to your machine if you attempt this

It's been a while but I wanted to update that I set the imon slope to like half to trick the Laptop into thinking that it was only outputting half the wattage and now it fully works properly albeit the AC adapter gets more hot so I have a fan pointed at it and it doesn't do a good job in keeping the laptop fully charged at all times. When doing intensive workloads for long times, the battery will drain despite being plugged in all the time, so you can take a break. If I remember properly, it really struggles to do anything under high load when charging while under 40% it's power throttled. I had no problems though for like a year (while I had changed thermal paste that was like 20c better than stock), so I was taking full advantage of the machine and it's CPU. I still had to hold it back a little because of the temperatures but I probably would have gotten a little more out of it if I switched my AS5 for something like SYY-157. My AS5 lasted for 4 years so far so I didn't want to switch it. And also for a reason below.

Having now moved on to a newer ASUS gaming laptop, it really is a shame that there is no S3 standby support (tried forcing it on in the OS and it worked until I woke it up and then it just hard reboot (or hard reset) for no reason after like 10 seconds of it being fully awake and functional) and it having extremely limited BIOS options with no special combo that I know of to unlock it, forcing me to deal with Armory crate which I hate. Much bigger pain in my ass to use rather than just having to use NotebookFan Control. Relies on MS store and it's own update system rather than just downloading whatever version you like. Runs tons of BS in the background and I had to really do some experimentation with neutering the blasted software. No open source solutions really can replace it yet as I can't figure out how to get the MUX switch working without it. It also had the Intel 12th gen problem where I can't even undervolt the damn thing. Thanks, Intel. I can't even remove the fans on the computer without removing the entire heatsink assembly. The metal top lid feels like a flimsy POS where EVERY SINGLE plastic lidded laptop I ever had bent less than this when opening the display. I need two hands to open this without bending it. The housing where the keyboard is is made of plastic, so that would be a better place for that metal to go. The surface of it it not level so they display is bent when the laptop is closed so that's really comforting. The charging port is also soldered to the board instead of being replaceable like on my Acer and it has one less USB port, but makes up for it with better onboard sound.

I will miss using my Acer laptop. Much slower nowadays but much more freedom. Also it had S3 standby. Much better than just hibernating my newer machine, which always dumps the RAM contents to the SSD, further wearing it out. that's the price I will pay I guess.

 

[Hamse_Baydaani]

@Michael19264 Bro my laptop Hp i7 8550u have same problem as yours littlerally Going down to 2.4 ghz when the power PL1 and Edp got triggered on limit section, and i'm not even changed pl or pl2 it's using the stock limit pl1 17 and pl2 25, The only thing i changed in the tpl window is changing my speed shift down to 32.