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Questions tagged [speedstep]

23 questions
22
votes
6 answers

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 frequency fluctuations as seen in Resource Monitor…
DanO
  • 2,826
11
votes
7 answers

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 OS according to AIDA64. I managed to install Intel…
Boris_yo
  • 5,994
7
votes
4 answers

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 SpeedStep only throttles up when it's safe (given the…
Andrew Arnott
  • 1,191
6
votes
8 answers

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 since 4 years, with this same 4 years-old laptop,…
Mouloud85
  • 161
5
votes
2 answers

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 called Intel SpeedStep Technology. I have absolutely…
Leprechaun
  • 159
5
votes
3 answers

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

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 then more power it will consume. I choose Power…
Debabratta Jena
  • 1,074
3
votes
0 answers

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 disable that one too, so that my system will use…
Bram
  • 227
3
votes
0 answers

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 clock rate had stepped itself down to 399…
Brad
  • 6,629
3
votes
1 answer

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) will rarely climb above 900MHz and I've never seen…
E.Garak9
  • 31
2
votes
2 answers

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 like: 4 seconds of 29-31 ms/frame, 9 seconds of…
Stefan Monov
  • 1,711
2
votes
0 answers

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 (2400Mhz) and originally it came with a core2duo…
Cris Orlando
  • 21
1
vote
1 answer

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 GPU continues to run at 350Mhz no matter what, and…
Steven Lu
  • 3,808
1
vote
1 answer

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. ========= Dear fellow Superusers, you may…
frr
  • 303
1
vote
1 answer

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

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 (similar to the noise when reading from a…
user2084795
  • 173
0
votes
1 answer

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 has the advantage of using 8 cores, lzma2…
user102648
  • 39
  • 2
1
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