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Odd clock speed issue

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December 18, 2011 11:00:13 AM

I recently purchased a new computer. Specs are:
Win7 Ultimate 64b
Intel i5 2500k
ECS P67H2-A3 mobo
GTX 570 OC
4GB DDR3 1333 ram
Silverstone Strider 750w

Anyway, I was interested in running some benchmarks to see how my computer compared to averages etc. So I ran 3D Mark 2011 first, and I quickly noticed some big discrepancies. First of all I thought the FPS I was getting in some of the tests was a little odd, but then I compared it to others. And there's a significant difference. Here's the benchmark
http://3dmark.com/3dm11/2371441

I also tried running PassMark Performance Test as an alternative benchmark. Their average score for an i5 2500k is 7470. I ran the test and got 4354.

For some reason my CPU is clocked at 2097mhz instead of the 3300mhz stock speed that it should be... and I have no clue why. If I go into my BIOS and CPU Configuration it tells me Processor Speed: 2100mhz. Same thing in Control Panel > System. DXDiag says - Processor: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz (4 CPUs), ~2.1GHz

What I've noticed from running CPU-Z alongside a Benchmark is that the Multiplier won't go above x21. It should go to like x33 for a non-overclocked i5 2500k.

So, is it somehow under-clocked, or just plain faulty?

More about : odd clock speed issue

a c 186 à CPUs
December 18, 2011 12:08:55 PM

boot into bios and change it to 33?
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a c 886 à CPUs
December 18, 2011 12:15:01 PM

If you are checking on idle then then Intel speed step if enabled will down clock it. On load it should increase the multiplier.
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December 18, 2011 12:36:52 PM

rolli59 said:
If you are checking on idle then then Intel speed step if enabled will down clock it. On load it should increase the multiplier.


No, idle multiplier is x16 as normal. Core speed is 1598 mhz which I believe is also normal. The problem is on load the Multiplier increases to x21 instead of the x33 it should be going to; leaving me with 2097 mhz instead of roughly 3300 mhz.

Here's a picture of this Intel program I just ran as an illustration... http://i.imgur.com/NZnFr.png

And I'm about to try the BIOS thing in a minute. Will report back with results.
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a c 886 à CPUs
December 18, 2011 12:43:15 PM

Thermal throttling? The heatsink incorrectly attached!
Eps power connector properly installed.
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December 18, 2011 1:03:04 PM

The CPU is at low temperatures even during benchmarks etc. Hits about 47C max at full load.

Anyway I just tried entering the BIOS to see if I could just adjust the clock speed... and even though my MOBO manual sitting here tells me I can adjust it, I clearly cannot, as the CPU Clock speeds and so on are listed but also greyed out so I cannot select them. I can change the voltages, disable speedstep and turbo and so on, but not core clock speed.
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a c 886 à CPUs
December 18, 2011 1:05:26 PM

You should have a function in there that takes it from auto to manual! It should enable the grayed out boxes, it might be an overclocking setting.
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December 18, 2011 1:17:25 PM

I installed some Chipset software for the MOBO earlier and I thought that was all the software I needed. I just looked again 10m or so ago and found some Intel Management Engine Components... installed it, rebooted and now it's reporting speed at 3.39 ghz and 100 mhz system bus. So all good, fixed :p  Sorry for the fuss but at least it's resolved.
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a c 886 à CPUs
December 18, 2011 1:18:30 PM

Great news!
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a c 186 à CPUs
December 18, 2011 1:18:45 PM

Vire70 said:
I installed some Chipset software for the MOBO earlier and I thought that was all the software I needed. I just looked again 10m or so ago and found some Intel Management Engine Components... installed it, rebooted and now it's reporting speed at 3.39 ghz and 100 mhz system bus. So all good, fixed :p  Sorry for the fuss but at least it's resolved.

next time remember to make sure you installed everything :na: 
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December 27, 2011 10:56:38 PM

Best answer selected by Vire70.
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