Help, i5 recently installed, high temps and voltage?

Errno · Jun 18, 2015

So I just bought the Intel i5 4690k together with a new motherboard and RAM, and installed them.
As soon as I re-installed windows I downloaded Core Temp and HWMonitor, and all of my cores appear to have reached between 65 and 72 degrees Celsius on idle.. The Vcore voltage is also showing 1.760 Volts. The temperatures sometimes change by 20 celcius in a heartbeat, they never seem to stabilize.

So I was wondering, are these values normal? Did I maybe do something wrong?
I am using the stock cooler by the way, which I wiped clear of the default thermal paste and applied Arctic Silver paste on the CPU instead.

Any info will be much appreciated, thanks!

gskill support · Jun 18, 2015

Are you sure you didn't apply too much?

65-72 is max? That is normal.

VCore definitely isn't 1.760V, something is mis read there.

Temperature changing by 20 degerees is normal as the CPU is designed to throttle between power saving and full speed. So when you place the system under load, temp will rocket up from 40-60

jediTT · Jun 18, 2015

Those seem high for idle temps. I have a 4690k and I hang around 30c while idling but I never used mine with stock cooler so I'm not sure what the stock temps would be. Still though it shouldn't be that high at idle, I only get to 60c after gaming for awhile and that's overclocked.

TechyInAZ · Jun 18, 2015

Go into CPU-Z and check out if that vcore is right.

gskill support · Jun 18, 2015

Depends on ambient temp, but you are right, they are some what on the high end especially if he's not really running anything intensive.. which leads me to consider he may have over-applied.

synphul · Jun 18, 2015

Those temps if correct and if at idle are way too hot. Even the stock cooler performs better than that so my guess is it wasn't installed completely tight. The default pushpin installation can be a pain, they all need to be fully secured. Check the bios to make sure no 'performance' settings were selected that may have enabled any auto overclocking. I agree, 1.76v is another reading not the vcore. As the cpu usage increases and decreases temps can change almost instantly, that's not unusual. I can idle at 30c, start prime95 to load all cores and they reach max temp in the 70's c within a second or two and drop just as fast when the test is cancelled and cores go back from 100% usage to 5%.

Errno · Jun 19, 2015

Hey thanks for your replies! The VCore thing was only a problem caused by HWMonitor. CPU-Z is showing it peeks at around 1.1 volts maximum.
Anyways, the temperature problem still exists.

gskill support :

I think it would be normal if my CPU was under load right? I am completely idle and it reaches that temp at times.

One thing I just noted was that when I opened 1 chrome browser and went to download CPU-Z, my complete CPU usage went to 90% at times, and my temperatures reached 73-76 degrees just from that. It is also worth noting that during my experiments windows updates may have been downloading or installing in the background, as I only recently re-installed windows.

So is the problem most likely caused by the stock cooler being wrongly installed or maybe the thermal compound, or is there something else here? Because I don't see why that would have affect on my CPU going 90% load doing basically nothing.

synphul · Jun 19, 2015

If something was in fact pushing your cpu to 90% load, then it would explain higher temps. 90% usage is 90% usage whether it's prime95 putting a load on the cpu or other tasks/software. When usage shoots up, task manager should tell you what it is. Go to the processes menu, make sure all users is selected (not sure if this is the same in win8) and you can click along the top row where it says 'cpu' to resort the list highest to lowest values. That should tell you what processes are consuming the cpu.

You should also be able to check the resource monitor (avail from the performance tab of task manager if you have trouble finding it). The cpu tab in resource monitor will show how many threads, how much usage in real time, how much of the cpu's processing time each process has consumed etc. A way to narrow down where the high usage is from.

If it's only jumping to 90% usage for a second or two, that's nothing out of the ordinary. That shouldn't cause higher temps like sustained 90% usage would be.

Those temps still sound high, I'd try removing the cooler and cleaning it along with the cpu, reapplying thermal compound and installing the cooler again. Keep in mind when people check temps it's usually either idle (0-2% usage, it's hard to keep a cpu flatlined at 0%) or under load (100% sustained). If load temps are safe, so should everything else. Some people mistake high idle temps being 40-50c and then find out it's while the cpu was at 20-30% load (not idle).

Errno · Jun 19, 2015

Okay I just ran prime95 and for a few minutes it stood at 81-85 degrees, but then it suddenly jumped straight up to 94-96 degrees so I shut it down fast. Definitely something wrong with my cooling.

I'm going to clean and re-apply the thermal compound now.

synphul · Jun 19, 2015

If using prime95, make sure you're using v26.6 and running small fft's for a steady heat load. Newer versions can push the heat unrealistically high and blend can cause temps to jump all around with varying levels of stress. Cleaning and reapplying compound and reseating the cooler is still a good idea. I'd be careful of running prime95 on the stock cooler though, it's just about the least efficient cooler out there and sometimes it's all it can do to keep a cpu cool under normal sustained loads like gaming for an hour straight. Prime95 is designed to push the cpu harder as more of a worst case scenario for thermal testing. For instance if you run prime95 on a cpu with decent aftermarket cooling and reach 72c, more realistic temps while playing a game will likely be in the lower 60's c.

gskill support · Jun 19, 2015

Remember a thin layer is sufficient. One method is placing a ball the size of a grade school No.2 pencil eraser, or green pea in dead center. You could spread or not because once you install the CPU cooler it'll automatically spread and flatten out evenly. Double check the edges, it should never over flow off the edge. But in any case, the thinnest layer is sufficient and more effective than too much. In some cases the CPU cooler isn't tight enough to squeeze the layer flat enough so then a lot is trapped in between and the heat transfer is not effective thus causing high temps and improper cooling.

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