Core i7-4770k running Prime95 hot. Is it safe?

[Arashi Haki]

I just install a new heatsink. I tried stress my cpu but the temp reach 100°C. I don't know whether it's safe or not. Did I install it wrongly?
Idle temp: 37-42 °C
Gaming: 60-80 °C

 

[Nelson Ng]

Call for the Fire Brigade!!!

Joke aside, you should thoroughly review your setup (check your voltage, heat sink mount, etc).

My i7-5820k OC to 4.0GHz is only max 68°C when on Prime95 (Small FFTs Test preset, ambient at 30°C)

Reset back to stock clock & voltages, then check your temp to confirm your heatsink installation is ok. If temp is too high, then suspect your heatsink. Did you use too little thermal paste? Etc?

If ok, then do your OC slowly. Increase the voltage in baby steps and ONLY as a last resort (a seemingly small voltage increase can result in a big power draw and temp increase). Try LLC and other settings first before upping the voltage...

Good luck,


P.s.: you still need to standby a fire response team

 

[Ferrum Master]

Fill your specs.

To me bad mounting or crappy cooler.

 

[basco]

which cooler and plz post a cpu-z screen or tell us how much volts its running.

 

[burebista]

You have 3 cores with LOG in thermal status area. That means that your CPU was throttling.
It looks like you have a problem after mounting your heatsink.

 

[GreiverBlade]

for me it look like a stock cooler mounted, or a bad mounting of a aftermarket heatsink, tho i tend to go for the 1st option.

 

[Arashi Haki]

My heatsink is CPU Cooler Master SEIDON 120V Plus. I don't know how much volt it runs or where to check it though.
But I just found out that the surface of my heatsink doesnt have any (or very little) thermal paste stuck on (I did expand it on the cpu). So I guess I try to reseat it. Thanks for ur replies.

 

[Kursah]

These CPU's are built to run up to 100C on the stock cooler, if you're in 60-80 under gaming, I wouldn't be very worried...

A reseat might help, as a larger tower cooler should do a better job than the stock cooler. Keep us posted.

 

[Toothless]

Reseat and check the voltage in CPU-Z. That's as hot as my 4790k on 1.45v with a stock cooler.

 

[Nelson Ng]

These CPU's are built to run up to 100C on the stock cooler, ...

That's the thermal limit and the CPU has to throttle itself to keep from burning up ...

 

[vega22]

the speed being 2600mhz also shows the throttling.

this is why haswells needed better tim....

i would read about your bios and test your oc to get lowest voltage needed as performance tanks like a bitch if you throttle.

 

[alucasa]

Even my CPU with 1U height heatsink does not go over 80c while rendering on 8 threads for hours...

You've got issues, OP. I'd try reinstalling CPU heatsink first.

 

[newtekie1]

That is definitely way too hot, the CPU is throttling due to the heat, which is a bad thing.

The Seidon 120V isn't the greatest cooler, it is only ever so slightly better than a Hyper 212 Evo. But you shouldn't be hitting throttling temps.

I think a re-seat is definitely the first place to start. And make sure to clean the old paste off the cooler and the processor using 70% or more Isopropyl Alcohol(Rubbing Alcohol).

If there is very little thermal paste on the cooler when you remove it, it may not be mounted correctly.

 

[manofthem]

What were your temps before the cooler swamp? Like others have said, it's gotta be a bad mount.

It's not too hard to mount a cooler incorrectly so do that. I'd also say to clean off the paste when you remount it

 

[xorbe]

Mine does the same thing @ 4.5. But I don't use Prime95, so ... meh.

Oh, are you really hitting 99C at 2.8 GHz? Yeah you can do better.

 

[peche]

you can do several things….

try to reseat your cooler, also replace entire TIM on that chip, clean everything and try a new install of the same cooler, also take a deep clean on the cooler, take out all dust,


if not… you may delid the processor.. better temps for sure lad….

otherwise you can change your cooler for a better one..

 

[Kursah]

That's the thermal limit and the CPU has to throttle itself to keep from burning up ...

Exactly, it was designed to not fail at the range up to that temp...where it will (very effectively) throttle itself, but at a lesser extent that previous generation CPU's...where Haswell/Devil's Canyon CPU's do a lesser throttle extent because they can handle up to 100C without burning up. I've tested this quite a bit in the years I've been on Haswell and Devil's Canyon. And in my tests and experience , the stock cooling allows the CPU to go up to the thermal throttle limit under heavier stress loads, if Intel was worried about this being an issue, they'd have included better cooling in the first place, which is what I originally said in far fewer words.

 

[Arashi Haki]

I've tried about 5-6 times re-installing the heatsink, I'm pretty sure i did correctly every steps on youtube. And it's still to hot when i run prime95. I don't know what to do now
About the voltages, I saw in BIOS the CPU Input voltage is around 1.7

 

[xvi]

What thermal paste are you using?

I'm pretty sure i did correctly every steps on youtube

 

[Arashi Haki]

What thermal paste are you using?

I used thermal paste coming along with Cooler Master Seidon 120v, it's inside the box.

 

[arnoo1]

I've tried about 5-6 times re-installing the heatsink, I'm pretty sure i did correctly every steps on youtube. And it's still to hot when i run prime95. I don't know what to do now
About the voltages, I saw in BIOS the CPU Input voltage is around 1.7

1.7 volts is way to much set it to 1.2v even on AUTO it should be around 1.15/1.25 stop testing first set the correct voltage or u will butn ur cpu

 

[R00kie]

1.7 volts is way to much set it to 1.2v even on AUTO it should be around 1.15/1.25 stop testing first set the correct voltage or u will butn ur cpu

He's talking about the input voltage, not the one that is going to the cpu.

 

[peche]

why you dont delid? you have everything... just buy a tube of coolab and try a delid... temps are going to lower a lot....

 

[sneekypeet]

Im going to go ahead and say I think it is either the pump has failed in that AIO or is not plugged in. This is if the CPU voltage is within normal ranges.

 

[Arashi Haki]

1.7 volts is way to much set it to 1.2v even on AUTO it should be around 1.15/1.25 stop testing first set the correct voltage or u will butn ur cpu

I set everything "Auto" in bios. I ain't trying to OC or anything.
However, after some adjusting the heatsink and re-apply thermal paste i get a better result. When I run prime95 -> Blend test. It's not as hot as before. It's pretty good this time.

but when i try stress it in "Small FFTs", it's still 100c.