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My CPU is throttling

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  • Laptops
  • Hewlett Packard
  • Speed
  • CPUs
Last response: in CPUs
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October 13, 2014 9:38:31 AM

Hi, I recently purchased a HP 250 laptop running windows 8.1 (2.40ghz / 4.00gb ram) I have ran LatencyMon and found out my CPU is being throttled, I have optimized the laptop and removed any unnecessary programs but I am still having issues. Can anyone help or suggest how to fix this issue?

Reported CPU Speed: 2395Mhz
Measured CPU Speed: 1535Mhz

Thanks :) 

More about : cpu throttling

a b α HP
a c 121 à CPUs
October 13, 2014 10:19:58 AM

What application are you running to keep the CPU busy enough so that it has to run at full speed? I checked what LatencyMon does and it's purpose isn't to make the CPU busy.
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October 13, 2014 10:36:16 AM

I don't have anything running which is why I am confused, I've checked background applications as well.

I only use this laptop with my Traktor Kontrol S2 MK2, I have disabled most devices including wireless etc.
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a b à CPUs
October 13, 2014 10:56:08 AM

Xzane said:
I don't have anything running which is why I am confused, I've checked background applications as well.

I only use this laptop with my Traktor Kontrol S2 MK2, I have disabled most devices including wireless etc.


The reason @GhislainG asked what you were doing to keep it busy, is that if there is nothing to do, the CPU PURPOSEFULLY slows down. Have you switched the power profile to "HIGH PERFORMANCE" ? Usually that will force the CPU to not slow down even if there is nothing to do.

BUT in a laptop where cooling is difficult, the best thing to do is to allow the CPU to regulate itself to lower the total power used and lower the heat generated.
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a b α HP
a c 121 à CPUs
October 13, 2014 11:11:22 AM

At idle it definitely doesn't need to run faster than 1535 MHz; it could even run at a lower speed. Run Prime95 or Intel Burn Test and your CPU will run at full speed, but the battery's charge will decrease quicker. Most processors are like that; my 3.4 GHz (3.9 GHz burst speed) i7-3770 usually runs between 1570 MHz and 1800 Mhz because it isn't busy enough.
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October 13, 2014 11:28:01 AM

I have done all the optimization tweaks, and set the power profile to high performance. I have disabled a power option in BIOS as well.

Reported CPU Speed: 2395Mhz
Measured CPU Speed: 1535Mhz

These speeds was when I was running Traktor.

What could be using up my CPU apart from Traktor?
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a b à CPUs
October 13, 2014 11:38:11 AM

Xzane said:
I have done all the optimization tweaks, and set the power profile to high performance. I have disabled a power option in BIOS as well.

Reported CPU Speed: 2395Mhz
Measured CPU Speed: 1535Mhz

These speeds was when I was running Traktor.

What could be using up my CPU apart from Traktor?


I would try running Prime95 and checking the CPU speed. If it doesn't max out then there could be problem. What you have done should cause CPU to run full. Were you running on battery of AC adapter? Have you checked to see if HP has any power management software installed?
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a b α HP
a c 121 à CPUs
October 13, 2014 11:39:49 AM

I don't know why you expect Traktor to use 100% of your CPU, but it definitely doesn't. Start Task Manager and tell us what the CPU usage is. Then check what CPU percentage is used by Traktor. Unless the CPU utilization is high, there's no reason for the CPU to run at full speed and drain the battery.
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October 13, 2014 11:51:37 AM

Sorry I have got this wrong, what I meant was when I am running Traktor I still get audio/latency issues even tho my controller has its own soundcard. I have spoke with Native Instruments and received this reply after running a few tests:

Hi Richie have you also checked your BIOS for CPU throttling / Speedstepping / energy saving? Check also for BIOS updates.

If you cant manage to set your CPU to full speed, then please get in touch with
the systems manufacturer, send him the screenshot of LatencyMon, and ask for
assistance on this topic.
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a b α HP
a c 121 à CPUs
October 13, 2014 11:59:26 AM

Traktor most likely isn't using the CPU at 100%. They want you to disable Speedstep in the BIOS, but is Windows configured for maximum performance? Is your notebook connected to AC when you are testing? It's speed may be limited when running on battery.
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October 13, 2014 12:04:35 PM

GhislainG said:
Traktor most likely isn't using the CPU at 100%. They want you to disable Speedstep in the BIOS, but is Windows configured for maximum performance? Is your notebook connected to AC when you are testing? It's speed may be limited when running on battery.


Yeah I made sure the AC was plugged in when I ran both tests (LatencyMons and DPC) I have tried all sorts of tweaks and changes but still having issues, DPC is in red/yellow when testing.
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a b à CPUs
October 13, 2014 12:07:03 PM

Probably speedstep if its an Intel CPU. Thats what it does
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October 13, 2014 12:15:26 PM

Paul NZ said:
Probably speedstep if its an Intel CPU. Thats what it does


Its an Intel dual core, I cant find the speedstep option in BIOS? I have made the changed in power options as well before anyone suggests that.
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a b à CPUs
October 13, 2014 12:20:15 PM

One way to find out go to power / change plan settings / advanced. Under processor power management. Change minimum and maximum processor state to 100%. Then it wont change
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October 13, 2014 12:22:40 PM

Paul NZ said:
One way to find out go to power / change plan settings / advanced. Under processor power management. Change minimum and maximum processor state to 100%. Then it wont change


I made all these changes before testing, I also disabled my wifi, my on board soundcard, and bluetooth. Still no joy. I have minimal programs installed on the system.


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a b à CPUs
October 13, 2014 12:25:52 PM

So are both 100%??
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October 13, 2014 12:35:22 PM

Paul NZ said:
So are both 100%??


Minimum Processor State:
On Battery - 100%
Plugged In - 100%

Maximum Processor State:
On Battery - 100%
Plugged In - 100%

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a b à CPUs
October 13, 2014 12:40:48 PM

Must be something else then. Find out what other features its got.
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October 13, 2014 12:49:49 PM

Paul NZ said:
Must be something else then. I dont know what the model is, so dont know what features its got


Hi, its a HP 250 G1 Notebook / Pentium 2020M (2.4GHz) / 4GB DDR3 / 500GB / Windows 8.1 64 bit

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a b α HP
a c 121 à CPUs
October 13, 2014 1:22:12 PM

As a test run Prime95 and check how fast the CPU is running. While Prime95 runs, start Traktor and check what it reports.
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October 14, 2014 9:19:43 AM

GhislainG said:
As a test run Prime95 and check how fast the CPU is running. While Prime95 runs, start Traktor and check what it reports.


I will try that later, how does it work? is it straight forward to use?

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a b α HP
a c 121 à CPUs
October 14, 2014 1:32:14 PM

Download Prime95, extract the files and run it. Stressing the CPU should make it run at full speed.
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!