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Questions tagged [speedstep]

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Intel SpeedStep not working in i3-380M

I have laptop Lenovo B560 instel i3-380M with Intel SpeedStep, however i am not getting full speed of CPU reported in CPU-Z when CPU is under 100% load. Windows 7 x64 EDIT: Guess it was battery issue (...
Roman Toasov's user avatar
1 vote
1 answer
405 views

Something throttling my Haswell CPU - not EIST, not PROCHOT, not ClockMod... what else?

Note: this question is a duplicate of a prior question that has received a pretty detailed answer. In the summer of 2023, I have published a long overdue summary of this topic at my employer's website....
frr's user avatar
  • 293
3 votes
0 answers
1k views

Disabling both intel_pstate and acpi-cpufreq in favour of speedstep-lib

My Haswell CPU uses, by default, intel_pstate to do the frequency scaling. I have been able to disable that in /etc/defaults/grub so that it drops down to acpi-cpufreq driver. However, I want to ...
Bram's user avatar
  • 227
0 votes
1 answer
80 views

MS-7996 how to turn off SpeedStep?

I have problem with my computer and want to turn off SpeedStep but can't find it in my BIOS. I checked my BIOS but can't find it. Used google but also couldn't find a solution. Anyone has any idea ...
Marcin's user avatar
  • 1
3 votes
0 answers
5k views

Lenovo T480 with i7-8650U drops down to 399 MHz and stays there

Sometimes, my laptop will suddenly start performing very poorly. I thought it might be overheating, so I checked HWMonitor and saw that the temperatures were fine. What I did see however is that the ...
Brad's user avatar
  • 6,332
1 vote
1 answer
2k views

What could cause "CPU noise" when Intel SpeedStep is enabled in the BIOS power settings? [duplicate]

Whenever I enable the "Intel Speedstep technology" in the BIOS power configuration, I can hear noise when operating the laptop. The noise is sometimes a clicking noise in idle-mode or a buzzing noise (...
user2084795's user avatar
0 votes
0 answers
79 views

CPU Downclocks When Mouse Is Moved

My CPU is Intel i7 6700, I have speed step and all c states enabled. The spec says it can down clock to 0.7 when idle, but for me on a fresh Windows 10 install it ranges between 1.5-1.9. However, if ...
Kite R's user avatar
  • 11
0 votes
0 answers
553 views

Can Intel CPUs change clock speed on a per-core basis?

Many multi-core Intel CPUs feature both SpeedStep and Turbo Boost, and can therefore run at clock speeds both below and above their base frequency. Can these CPUs control the clock speed per-core, or ...
user200783's user avatar
3 votes
1 answer
2k views

Granular Control of Intel Speedstep? - Skylake Windows 10

Currently both "Balanced" and "Power saver" power plans claim the minimum processor state is 5%, maximum is 100% and the cooling policy is passive. However on power saver the processor (i7 6700HQ) ...
E.Garak9's user avatar
2 votes
0 answers
701 views

Speedstep shutting down notebook

I have an old notebook that is having problems regarding random shutdown, caused by speedstep It is a Mirax PR6050 (MSI PR600 rebranded for BR market) with GM965 chipset The CPU is a core2duo T8300 (...
Cris Orlando's user avatar
6 votes
8 answers
45k views

Cpu running half speed

While playing a game few hours ago I noticed my computer suddenly became incredibly slow. The windows task manager showed that the cpu was using half its capabilities. I have been playing this game ...
Mouloud85's user avatar
  • 161
-1 votes
1 answer
1k views

What is Intel Speed Step technology?

My Samsung N145+ Net book specs say that my Intel Atom Processor N455 supports Speed step technology. Is this something that can be activated or is it always working? Is it just a marketing ploy?
Bob Haines's user avatar
0 votes
1 answer
838 views

7-zip -v switch will fail to use cpu properly?

I have been using this script for years, back from when above 2 cores was a challenge in 7z and I had just offered myself a shiny i7: "C:\Program Files\7-Zip\7z.exe" u -m5=lzma2 -mmt=8 %1.7z %1 This ...
user102648's user avatar
5 votes
2 answers
54k views

How to turn off SpeedStep in Windows 7?

I have an Asus N53SV laptop with Windows 7 64-bit. I need to calibrate profiler in NetBeans, and to do that I need to disable functions that lower the CPU frequency in my laptop. I believe it's ...
Leprechaun's user avatar
0 votes
0 answers
49 views

CPUMON mhz reading weird

I am using this cpu usage monitor: http://www.den4b.com/?x=products&product=cpumon. They give a cpu speed monitor (im assuming to monitor speedstep). However when the computer is idle it seems to ...
agz's user avatar
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0 votes
0 answers
88 views

Advanced power options - processor power managment [duplicate]

My cpu has p states at 2.3 ghz, 2.1 ghz, 1.1 ghz, and 800 mhz. In the advanced power options-processor power management. Windows allows you to change the percentage. Does this percentage get "rounded" ...
agz's user avatar
  • 8,328
4 votes
3 answers
21k views

How speed and frequency of a processor are related to each other? [closed]

I think that clock rate of processor determines the speed of core, in my case it is 1.86GHz. But If I am not wrong, it also determines that how much energy it will consume. If you have more frequency ...
Debabratta Jena's user avatar
1 vote
1 answer
685 views

How to check the clock speed of Sandy Bridge HD 3000 IGP in OS X?

I am writing a cross-platform OpenGL application and I am experiencing very different performance results between OS X and Windows (both 7 and 8). In Windows GPU-Z reports the Sandy Bridge HD 3000 ...
Steven Lu's user avatar
  • 3,718
2 votes
2 answers
2k views

CPU performance fluctuates wildly

CPU: Intel Core 2 Duo P8400 @ 2.26GHz. I've had this laptop for about 3 years and in the past month I've started getting periodic framerate drops in games. Usually the pattern is random, something ...
Stefan Monov's user avatar
  • 1,691
-2 votes
3 answers
5k views

Why is Intel Turbo Boost Not Working On My Laptop? (Continued) [duplicate]

This is continuation to previous question **Please read previous question in order to understand my findings.* Okay guys, this is REALLY strange. It seems as Intel Turbo Boost was always working, ...
Boris_yo's user avatar
  • 5,904
11 votes
7 answers
53k views

Why is Intel Turbo Boost Not Working On My Laptop?

Investigation continued Why is Intel Turbo Boost Not Working On My Laptop? (Continued) Dell Latitude E6420 is my laptop with Windows 7 Enterprise. Turbo Boost is enabled in BIOS but is disabled in ...
Boris_yo's user avatar
  • 5,904
7 votes
4 answers
46k views

How to disable SpeedStep for an Intel Core i7 processor?

I'm taking performance measurements of several bits of code. How can I disable SpeedStep on my Core i7 CPU so that the CPU clock speed is constant? I'm not trying to overclock here, and since ...
Andrew Arnott's user avatar
22 votes
6 answers
60k views

What regulates Intel SpeedStep CPU throttling? Can I get some control of this on Windows7?

I’m trying to get a big virtual disk file compressed (using WinRar) before I go home today, but my CPU frequency keeps merrily going up and down between the nominal 2.8 GHz and a measly 800 MHz! The ...
DanO's user avatar
  • 2,798