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Overclocked CPU, really high Prime95 temps, now higher idle temps.

Tags:
  • Overclocking
  • Thermal Compound
  • CPUs
Last response: in CPUs
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January 28, 2014 12:27:28 PM

Hi,

So I just attempted to overclock my i5 4670k, I have a hyper 212 evo on top of it which the thermal paste installation wasn't perfect for, think I put a bit too much on and I failed to install the cooler several times so the layer wasn't very even.

When overclocking to 4.2GHz temps were about 35 degrees, they're normally about 30 degrees when clocked to 3.73GHz using the windows power plan option. I thought these temps were normal, so I ran Prime95 and my CPU temp went to 100 degrees instantly, not even sure how that's possible, I shutdown my pc instantly as I didn't know how to close the benchmark as I was panicking.

Now my temps are about 33-34 idle, back to 3.73GHz on power plan, have I damaged my CPU?

More about : overclocked cpu high prime95 temps higher idle temps

January 28, 2014 12:32:23 PM

From what you've said, or at least from what I understand, your temps are exactly the same as they were before.

It's unlikely you've damaged your CPU. Generally if it exceeds a certain temperature it will turn itself off to prevent damage. From what I've heard the Haswell chips can withstand temps of up to 105C so you should be fine (I'd personally never run a rig at more than 75C).

Do you know how to overclock? i.e slowly increasing the multiplier and testing until it fails, and then increasing the voltage in small increments? If not, I'd advise you look at some guides before messing with it again.
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January 28, 2014 12:41:42 PM

JOOK-D said:
From what you've said, or at least from what I understand, your temps are exactly the same as they were before.

It's unlikely you've damaged your CPU. Generally if it exceeds a certain temperature it will turn itself off to prevent damage. From what I've heard the Haswell chips can withstand temps of up to 105C so you should be fine (I'd personally never run a rig at more than 75C).

Do you know how to overclock? i.e slowly increasing the multiplier and testing until it fails, and then increasing the voltage in small increments? If not, I'd advise you look at some guides before messing with it again.


I've turned off the overclock and temps are still high :/  Didn't explain it very well in the post
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January 28, 2014 1:06:41 PM

It's possible that your voltages are high. I'd recommend going into the BIOS and resetting to optimised defaults (often assigned to an F button, have a look in the key).
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January 28, 2014 1:09:21 PM

JOOK-D said:
It's possible that your voltages are high. I'd recommend going into the BIOS and resetting to optimised defaults (often assigned to an F button, have a look in the key).


I did reset to setup defaults to remove the OC. I just used the automatic slider thing and din't adjust voltages manually
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January 28, 2014 1:25:35 PM

I would reinstall your Cooler and just use a pea sized dot of thermal paste .
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January 28, 2014 2:36:52 PM

It should throttle or shut itself down to prevent damage, before it occurs.

What's your voltage at? I'm assuming you either didn't mount your cooler properly or your voltage is in the 1.35v range (way too high). Also, keep in mind that running Prime95 on Haswell processors is not suggested.
Reseat your cooler and reapply thermal paste, then try using Intel burn test.
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January 28, 2014 8:08:54 PM

If you're questioning your thermal paste install then pull the cooler off and re-do it. Poorly applied thermal paste can certainly affect temperatures, especially under load. (for quick reference, I just dropped 10 degrees Celsius on my video card simply by re-applying the thermal paste, which wasn't applied great from the factory).

Just to give you comparable numbers, I've also got an i5-4670k OC'd to 4.4GHZ, tested at 1.2V (it's on 1.2V adaptive right now), idling between 30-35C, and between 65-70 under load.

Re-apply and re-test. You just need a thin, even layer of paste.
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