Kaby Lake i7 7700k with Hyper 212 Evo - fluctuating temps

[jochs20]

[strike]I recently bought a i7 7700k with an ASUS Z170-A motherboard. According to HWMonitor, my clock speeds are going all over the place but not going past 4.5 ghz, and this is right out of the box. I have not opted to overclock as of yet. I have no idea if it's related or a separate problem, but I noticed my cpu fan speed will start to speed up for a few seconds, going from 600 RPM to over 1000, but then casually go back down. My vcore voltage ranges anywhere from 0.600 to 1.260, however in bios it reads it at around 1.200 and does not drop. The temperature stays at around 30C . I honestly have no idea what's going on here. BIOS is up to date. [/strike]

EDIT as of 3/7/2017:

The main problem now is the temps. If I'm doing something such as just browsing the web, the core temps will jump from about 28-30c all the way to anywhere between 40-55c and the fan will speed up, and the temps immediately go back down, all of this within 2-3 seconds, and usually repeats within the next 30 seconds. The behavior does not occur during idle. I'm running an i7 7700k with a Hyper 212 Evo heatsink and fan, and my motherboard is an ASUS Z170-A. My OS is Windows 10 64 bit.

 

[madmatt30]

Honestly sounds like normal behaviour.
4.5ghz is turbo clock speed , clocks & voltages will vary depending on use due to speed step settings.

 

[Toastyx3]

Do you have some sort of easy OC or auto tuning program active? Some manufacturers provide these features and give you an oc preset. What psu do you have?

 

[jochs20]

I had AI Suite III installed but I uninstalled it because the temperatures were inaccurate. Oddly enough it was saying that TPU was enabled despite it being switched off on the motherboard. My PSU is EVGA SuperNOVA 850G2

 

[Tadeh123]

cpu spikes are normal and that's what this is sounding like to me

 

[jochs20]

cpu spikes are normal and that's what this is sounding like to me

I get that, but what would be causing the rapid fluctuation of the fan speed? This is happening constantly, not specifically limited to playing a game or anything.

 

[Tadeh123]

cpu spikes are normal and that's what this is sounding like to me

I get that, but what would be causing the rapid fluctuation of the fan speed? This is happening constantly, not specifically limited to playing a game or anything.

so what mobo fan slot do you have the cpu fan it make sure it isnt the pump 3 pin on the z-170

 

[jochs20]

cpu spikes are normal and that's what this is sounding like to me

I get that, but what would be causing the rapid fluctuation of the fan speed? This is happening constantly, not specifically limited to playing a game or anything.

so what mobo fan slot do you have the cpu fan it make sure it isnt the pump 3 pin on the z-170

It's connected to the 4-pin cpu fan connector.

EDIT: Just to clarify, about every 25-30 seconds the fan speeds up and then slows back down and repeats this.

 

[k1114]

What's the fan target temp in bios?

 

[helpstar]

read temp. with coretemp, the behaviour looks like your CPU is getting too hot in idle

in BIOS it´s normal that the CPU is "maxed", just in windows or similar the energy saving options are active.

up to date BIOS installed? Flash in BIOS with integrated ez flash and not in Windows!

 

[jochs20]

read temp. with coretemp, the behaviour looks like your CPU is getting too hot in idle

in BIOS it´s normal that the CPU is "maxed", just in windows or similar the energy saving options are active.

up to date BIOS installed? Flash in BIOS with integrated ez flash and not in Windows!

Core temps. are consistently 30c, whenever the fan speeds up, the temps read 45-50c, but then literally a second later they read 30c again. I highly doubt that's accurate.

I updated BIOS via ez flash.

 

[k1114]

Temps do literally change in seconds from load changes. The issue still sounds like low target temps. It's speeding up from those short temp increases. I'd also look at what is using the cpu to cause that.

 

[Toastyx3]

That's pretty normal behavior. The interior of your case gets to a certain temperature. In idle mode most coolers turn off to save power and also to reduce noise. If your cpu goes over the accepted temp limit the cooler turns automatically on. Most mainboards have a cup fan curve option. You just need to adjust that and your cooler should stop doing that.

 

[jochs20]

Temps do literally change in seconds from load changes. The issue still sounds like low target temps. It's speeding up from those short temp increases. I'd also look at what is using the cpu to cause that.

 

[helpstar]

After the update, did you load and save the default BIOS settings?

@Toastyx3
CPU cooler doesn´t usually turn off completely, that´s a feature still only available for GPUs (graphics cards).

I would check if the cooler is still correctly (tightly and plainly) seated with a correct amount of thermal paste.
Set the fan control in BIOS to silent and check temperatures again. The temps. are looking fine, if the CPU raises frequency to 4.5GHz. You can use fan control 3 in BIOS to adjust the fan curve. Read page 11 of the manual how to.

Which CPU cooler is it?

Chipset and ME drivers from the ASUS site installed?

 

[jochs20]

After the update, did you load and save the default BIOS settings?

@Toastyx3
CPU cooler doesn´t usually turn off completely, that´s a feature still only available for GPUs (graphics cards).

I would check if the cooler is still correctly (tightly and plainly) seated with a correct amount of thermal paste.
Set the fan control in BIOS to silent and check temperatures again. The temps. are looking fine, if the CPU raises frequency to 4.5GHz. You can use fan control 3 in BIOS to adjust the fan curve. Read page 11 of the manual how to.

Which CPU cooler is it?

Chipset and ME drivers from the ASUS site installed?

It's still doing it in silent mode just not as frequently. The cooler is properly seated. I used a pea-sized blob of thermal paste which I spread using an old credit card. I'm using a hyper 212 evo. If you feel that I should not have spread it, let me know and I will redo it tomorrow.

I'm aware that I can adjust the fan curve, but I don't want this thing running hotter than it needs to. Keep in mind it does not do this in idle, but if I'm browsing the web it will do it.

Drivers are installed btw.

 

[helpstar]

You shouldn´t have spread it yourself, the cooler would have done that step for you.

If you don´t want to get it hotter than this and won´t adjust the fan speed, then you will have to downclock your CPU. Use the energy option "power saver" in windows instead of "balanced". Eventually you will have to set the CPU max frequency to 70% or lower.

 

[madmatt30]

Just set your cpu fan in bios to 1000rpm minimum (50%)& you won't see those temp jumps or quick rpm increases.

Plainly if the clocks & voltage are jumping it's hitting a load point & increasing them - which in all honesty is absolutely normal.

The evo fan goes right down to 600rpm - most 120mm CPU fans only go down to 850-900rpm.

 

[k1114]

What about cpu usage that would be causing temps to go up to 45-50c?

 

[jochs20]

You shouldn´t have spread it yourself, the cooler would have done that step for you.

If you don´t want to get it hotter than this and won´t adjust the fan speed, then you will have to downclock your CPU. Use the energy option "power saver" in windows instead of "balanced". Eventually you will have to set the CPU max frequency to 70% or lower.

I've re-applied the thermal paste, this time spreading it via the weight of the heatsink. No changes. I went ahead and turned turbo mode off, and it's still doing this. Adjusting the fan speeds helps but it did not rectify it 100%. I also loaded the default bios settings like you said earlier. When I'm playing a game the temperatures are pretty stable. 45-50c playing a game like Fallout 4 on Ultra settings on 1080p.

 

[jochs20]

I've heard that the i7-7700k runs too hot for the Hyper 212 evo. Perhaps this is my problem?

 

[k1114]

Completely false and you are obviously not too hot. Look at task manager. What is using your cpu? That's what's causing the temps to increase.

 

[helpstar]

It doesn´t run too hot, it´s just a bit hotter than better cooling solutions. This has no impact on the life span, just the fan has to do a bit more

 

[jochs20]

Look at task manager. What is using your cpu? That's what's causing the temps to increase.

Whenever the temps spike, it shows my web browser 15-20% cpu usage.

 

[Tadeh123]

hyper 212 wouldnt be my first choice but literally everything your describing is normal