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CPU frequency to high....

Stefan1024
By Stefan1024
in CPUs, Motherboards, and Memory
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might just be a rounding error with the changes in to the bus speed?

 

Yes it's most likely just false reading. Especially as 300MHz are unrealistic.

As I have no problem with stabillity at all, I will just ignore the reading....

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So I recently overclocked my CPU a bit to 4.5GHz and it works fine.

However I noticed some occasional spikes to 4.6 GHz caused (most likely) be the Intel turbo boost. The duration is about 1 second, than it goes down in the save area again.

While I like more speed, this frequency is not 100% stable on the voltage I'm running now. So I'd like to avoid it.

 

Setting the frequency to static is not an option for me as I like to use the power saveing provided by adaptive frequency....

 

As the spike time is short it's hard to get a CPU-Z screenshot, but 4.6GHz is also reported by GPU-Z.

 

post-216771-0-52495200-1447790334_thumb.

 

My spec:

  • CPU: i7-4790k
  • Motherboard: Asrock Z97M OC Formula
  • RAM: Trident G.Skill 4x8GB, 2400 MHz
  • GPU: 2x EVGA GTX980 SC ACX 2.0
  • Storage:Intel 750 400GB, Samsung 850 Evo 500GB & WD Red 2 TB
  • PSU: Enermax Digifanless 550 watt
  • OS: Windows 10 Pro, 64 Bit

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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disable turbo boost in bios?

                     ¸„»°'´¸„»°'´ Vorticalbox `'°«„¸`'°«„¸
`'°«„¸¸„»°'´¸„»°'´`'°«„¸Scientia Potentia est  ¸„»°'´`'°«„¸`'°«„¸¸„»°'´

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this happens on my GAMING 5 + 4670k. but only for one second just like you describe. but i doubt that it would cause instability. problem is i cant disable turbo boost on my board. id say that what your experiencing is ok, but i doubt that it spiking for one second to a higher speed would cause instability. and is vcore hw monitor reporting accurate? 

 

and nice build

RIG #1 : 4670k @4.4 / 1.25v vcore. @ 4.5 / 1.3v vcore/ 1.95v vccin. MSI GAMING 4G GTX 970 @1540/3700 1.275v BIOS MOD. 16GB Kingston HyperX Savage RAM 2400mhz. MSI GAMING 5 Z97 MOBO. Fractal Design Define S. Dark Rock Pro 3. 850 EVO 250GB Seasonic M12II 620w
RIG #2: 4790k @ 4.6 / 1.25v vcore. EVGA SC ACX 2.0 980 SLI. 16GB Corsair Vengeance Pro 2400mhz. Asus MAXIMUS VII Hero Z97. Fractal Design Define R5. NH D15. 850 EVO 250GB AX 860
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your bus speed is tettering between 99.xx to 100.xx

watch CPU-Z for the changes..

Yes the BCLK is not 100% stable, but to reach that speed it needs to run at 102MHz, what is a pritty massive change.

Also the minimum frequency goes down to 300 MHz what is even more far off.

I think it might be false reading. But I don't like that eigther.

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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this happens on my GAMING 5 + 4670k. but only for one second just like you describe. but i doubt that it would cause instability. problem is i cant disable turbo boost on my board. id say that what your experiencing is ok, but i doubt that it spiking for one second to a higher speed would cause instability. and is vcore hw monitor reporting accurate?

and nice build i see you hate fans.

Ok, thx for the info.

CPU-Z showes the same voltage as HW monitor (it is fixed, not adaptive).

I haven't measured it, but I don't thrust my low cost multimeter to be accurate enought.

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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Ok, thx for the info.

CPU-Z showes the same voltage as HW monitor (it is fixed, not adaptive).

I haven't measured it, but I don't thrust my low cost multimeter to be accurate enought.

well 0.95v for 4.6 ghz is pretty low so increase it and see if its stable... it could be that its the low vcore to blame not the slight spikes in cpu clock

 

EDIT: i checked your thread on your build and you say 1.226v is your vcore.. but still increase it. 3h isnt enough imho.

RIG #1 : 4670k @4.4 / 1.25v vcore. @ 4.5 / 1.3v vcore/ 1.95v vccin. MSI GAMING 4G GTX 970 @1540/3700 1.275v BIOS MOD. 16GB Kingston HyperX Savage RAM 2400mhz. MSI GAMING 5 Z97 MOBO. Fractal Design Define S. Dark Rock Pro 3. 850 EVO 250GB Seasonic M12II 620w
RIG #2: 4790k @ 4.6 / 1.25v vcore. EVGA SC ACX 2.0 980 SLI. 16GB Corsair Vengeance Pro 2400mhz. Asus MAXIMUS VII Hero Z97. Fractal Design Define R5. NH D15. 850 EVO 250GB AX 860
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well 0.95v for 4.6 ghz is pretty low so increase it and see if its stable... it could be that its the low vcore to blame not the slight spikes in cpu clock

The voltage reported by the MoBo is far off, but the one measured by the CPU (1.172V) is exactly what i set in the BIOS.

Also I don't have stability problemes (yet).

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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@Patrick Bateman

3h stress test + "a lot of hours" gaming and no bluescreen at all :)

I may do more testing in the future.

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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The voltage reported by the MoBo is far off, but the one measured by the CPU (1.172V) is exactly what i set in the BIOS.

Also I don't have stability problemes (yet).

ok so 0.96v wasnt what you were getting under load? and does this happen when not under 100 percent load? 

RIG #1 : 4670k @4.4 / 1.25v vcore. @ 4.5 / 1.3v vcore/ 1.95v vccin. MSI GAMING 4G GTX 970 @1540/3700 1.275v BIOS MOD. 16GB Kingston HyperX Savage RAM 2400mhz. MSI GAMING 5 Z97 MOBO. Fractal Design Define S. Dark Rock Pro 3. 850 EVO 250GB Seasonic M12II 620w
RIG #2: 4790k @ 4.6 / 1.25v vcore. EVGA SC ACX 2.0 980 SLI. 16GB Corsair Vengeance Pro 2400mhz. Asus MAXIMUS VII Hero Z97. Fractal Design Define R5. NH D15. 850 EVO 250GB AX 860
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ok so 0.96v wasnt what you were getting under load? and does this happen when not under 100 percent load?

I have 1.172V all the time, regardless of the load.

Also under heavy load I allwas have 4.5GHz. I only get 4.6 when it jumpes up from idle.

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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I have 1.172V all the time, regardless of the load.

Also under heavy load I allwas have 4.5GHz. I only get 4.6 when it jumpes up from idle.

might just be a rounding error with the changes in to the bus speed?

                     ¸„»°'´¸„»°'´ Vorticalbox `'°«„¸`'°«„¸
`'°«„¸¸„»°'´¸„»°'´`'°«„¸Scientia Potentia est  ¸„»°'´`'°«„¸`'°«„¸¸„»°'´

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might just be a rounding error with the changes in to the bus speed?

 

Yes it's most likely just false reading. Especially as 300MHz are unrealistic.

As I have no problem with stabillity at all, I will just ignore the reading....

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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