Help with CPU.

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EyyMunchian

EyyMunchian

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Dec 28, 2016
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Hello guys!
I've finished building my custom PC and it works wonderfully, but there are little things here and there that bug me. My CPU is an Intel Core i5-2500s. An issue is my CPU stays locked at a frequency of 2.78 GHz and once in a while jumps to 2.81 GHz. It is advertised that my CPU has a base of 2.7 GHz and a turbo max of 3.7 GHz but to this day I've never even broken 2.9 GHz. This is what I have done and they all failed to help me out:

- New fan (Stock cooler and new fan both same results)
- Re-applied thermal paste after cleaning the first layer properly. (Watched a tutorial on how to do it.)
- Used Intel Xtreme Tuning Utility to investigate and stress test.
- CPU-z/CPUID stress test
- Checked MOBO for faulty problems (MOBO works 100%)
- Upgraded my PSU, 450 watts to 600 watts

Any help would be great thanks!

 
Solution
volkgren
Did you check BIOS settings for Intel Turbo boost settings? What motherboard do you have? What are you using to monitor clock speeds? Use HWInfo and see maximum single-core clock speed.

Intel Turbo Boost works like this: max turbo boost is for one core at a time, then in between base clock and max turbo it is incremental; so while 1 core will boost to 3.7GHz, 3 cores may boost to 3.5GHz, 2 cores to 3.3GHz, and all 4 cores to 3.2GHz (or whatever the speeds happen to be.)
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volkgren

volkgren

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Aug 13, 2017
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Did you check BIOS settings for Intel Turbo boost settings? What motherboard do you have? What are you using to monitor clock speeds? Use HWInfo and see maximum single-core clock speed.

Intel Turbo Boost works like this: max turbo boost is for one core at a time, then in between base clock and max turbo it is incremental; so while 1 core will boost to 3.7GHz, 3 cores may boost to 3.5GHz, 2 cores to 3.3GHz, and all 4 cores to 3.2GHz (or whatever the speeds happen to be.)
 
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Solution
n0ns3ns3

n0ns3ns3

Illustrious
May 25, 2016
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the turbo boost is a feature that can be enabled or disabled in BIOS.
I'd suggest to make sure you have the latest BIOS and reset it to defaults.

EDIT:
don't forget that 3.7 is the single core boost - means will only see it in a single threaded load
 
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EyyMunchian

EyyMunchian

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Dec 28, 2016
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My Mobo: Intel DQ670W Motherboard
Turbo boost is enabled but only using a single core (via single core stress benching on CPU-z/CPUID) I hit a MAX of 3.1 GHz.
Only 2 I get a MAX of 2.9 GHZ
3 and 4 cores stale at 2.78-2.81 GHZ

 
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EyyMunchian

EyyMunchian

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Dec 28, 2016
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Wow, I must be an idiot to have overlooked that my CPU has a 28x clock when 4 cores are enabled. Oops. Thanks, all!!
 
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