Disable CPU thottle for good

Question

Hello,

I whould like to know how can I disable the CPU thottling for good . I have an Inspiron 5559 and even if is 4 year old is a decent system (i5 and 8GB of RAM + touchscreen) for my 8 year old kid to start learning using a computer and play MIT scratch. The problem is that it doesn't recognize the charger anymore (is a DELL genuine one) and CPU stay around 0.4 GHz. The charger had been changed by Dell while in waranty. I can't stay on baterry because is dead, meaning even it shows 70% charged if charger is dissconnected it dies. For now I am using ThrottleStop to disable the BD PROTHOT and enable TurboMode, so the CPU stays happy at 2.7 GHz and the system is super stable. BTW dissabling SpeedStep and C states in BIOS doesn't help at all.

I realy do not understand why Dell is doing this if they cannot made a decent and reliable charger!!! More Dell is chargind 40EUR for a complete disagnostic. Don't know what it's doing more then the one allready present in BIOS, but .....

Not to say, I brought a new SSD thinking that the HDD failed, I spend some hours cleaning the CPU cooler, changing the thermal paste and finding the root cause of the issue. Only after a full BIOS reset it took 30 minutes to see something on the screen (Dell logo).

It is a shame, I had used Dell laptops for around 20 years, as personal and bussines ones, and most of the models (vostro, inspiron, lattitude, presario and xps), but this is the last one. I guess my kid will learn Ubuntu fist (because I know how to disable this throttling with linux kernel) if isn't any BIOS available to remove this seetings from the Intel's MSR registers.

ejn63 · Answer

This is a bit like asking why you have to keep patching cracks in your walls all the time, when it's the foundation that's cracked.

You need a recognized adapter in order for the system to perform correctly. Start there.

AdrianG001 · Answer

For those who are comfortable changing your computer's BIOS settings, reboot your system to access your computer's BIOS. Watch the screen for the key you must press (e.g. F1 or F2) to enter the settings menu. Any qualified computer technician can also do this for you.

Look for a power management feature in the BIOS, disable it and save the settings. These features may slow down your CPU at times to save power. Look for a setting labeled with something generic such as "Power Management" or with something more specific such as "Enhanced Intel Speedstep Technology," "Enhanced C1," "Enhanced Halt State" or "Cool'n'Quiet." Some BIOS software, particularly in laptops, may not allow you to change this setting. Refer to your computer documentation for more specific information.

decedat · Answer

That's not true. The charger is Dell genuine and it able to sustain 45W power consuption (I measure it -> trivial to do it if you have some basic knowledge of electronics). Dell chargers have 3 wires, 19.5V, GND and a 3rd wire. This 3rd wire most probabtly is used with "1-wire protocol" to detect the charger. BTW is quite trivial to fake a genuine Dell charger by shiffing this wire with an logic analyzer and use the cheapest microcontroller available on market. This throttling is done by BIOS by writing 1 bit in the Intel's CPU MSR registers and this is done by BIOS. Is no way Intel will do that with their firmware from "Intel Management Engine" since they don't know how/where their CPU will be used.

FYI, my current bussiness laptop is a Lenovo ThinkPad, and I forgot my charger in a hotel room while I was in a bussines trip. Until I received a new genuine charger I just cut the cable of an old charger, solder a matching connector and that's it. The laptop worked great and super stable (even better because it was a 95W charger ) and the battery was charging.

As I've sayed I was a Dell laptops user for long time, but this is quite a . Simply I am not willing to pay 100EUR more for a charger and a battery. I just want to use for what I have allready payed. Intel i5 CPU at 2.4 GHz, 2.7GHz with turbo enabled.

decedat · Answer

Hello, It doen't help any. Allready tried. The only option I see is to flush a 3rd party BIOS like coreboot or linuxbios, but it doesn't worth the effort.

dagger1982 · Answer

Yep, I am in the exact same boat. 5559 i7 that I updated the bios for the specter/meltdown vulnerability a few years ago and it totally messed everything up and it didn't recognize the battery anymore. Figured it was a lost cause until recently I sent it to Dell to fix. They said they 'repaired the motherboard' but in reality did nothing. Exact same thing out of the Dell box. Didn't get around to checking it so my 90 day repair is out the window. Dell used to be rock solid, I see cracks now. Asked them to fix their non-fix and they want $39 for a diagnostic. Thank you for starting this off, thought I was alone on this. I will try the ThrottleStop.

urbaxkom · Answer

That's your advice? And why should I need that, if my charger and my laptop are fine with the exception of this identification system that I don't need at all?

You're talking to IT people here, we are not your usual idiots, pal. Dell, stop extorting money from people who CHOSE to buy your equipment. You know what it's gonna lead to... From time to time one of us is going to be the guy to choose which company's laptops OUR company should order for it's 200 developers. We will play as fair then as you played with us today.

No_one789 · Answer

Uninstall the app called 'Intel Dynamic platform and thermal framework' It controls those unclocking stuff

Inspiron

Disable CPU thottle for good

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