CPU hit 111c yesterday any advice on what’s causing it?

[Pottsey]

My PC has always ran a little on the hot side but its getting much worse.
6 to 8 months ago it ran at 45 idle to 66c full load perhaps 70c when my room was hot day mostly 1000 to 3500 RPM winter time. Now it’s on 70 idle 3500 to 4500 RPM and 95c full load with small amounts of throttling at 95c. Sometimes it hits 110c with lot of throttling and soon after shuts down but that’s rare.

Sometimes like last night it hit 4200 to 4500RPM at 70 idle to make matters worse that was undercloaked from 3.2 ghz down to 2.8ghz with the Vcore lowered from the default 1.4 down to 1.235. Even taken into account its summer and warmer those temps seem way too high.

Clearly the 110c temp is impossible and I have known since early on that my temp sensors are off perhaps by as much as 20c. I figured as throttling starts at 95c then the real temp is closer to 80. Oddly sometimes it hits 97c without throttling.

As I don’t move the PC and it’s a good 8 months old now I don’t have much idea on what’s wrong. Do temp sensors change over time? Is it possible that the temp is the same as 8 months ago only the temp sensory has got worse?

Do heat syncs get unseated even if the PC doesn’t move? It feels secure but I haven’t tried re seating it yet. Got an ArctiClean Thermal Material Remover + Arctic Cooling Freezer 7 Pro and 2nd case fan on order and will try that over the stock fan next week. EDIT: the heatsync feels very hot to the touch, cannot keep my fingers on it. But it does not burn me.

What about the thermal material can that die and need replacing after such a short amount of time?

Anyone got other ideas on what could be causing the temp increase?

PC is a Asus P5WD2 motherboard with a dual core 3.2ghz Intel CPU.

 

[turbotoaster]

does it fell hot to touch at idle or 100% load, or both?

if you heatsink is hot that means your getting good contact

 

[Pottsey]

Its hot at idle. Which I guess isnt good news.

Going to try and undercloak it to 1.8ghz.

 

[Richdog]

It's quite simple, your heatsink isn't good enough, and may possible be making poor contact with the CPU.

Either way you need to buy a good heatsink and fan combo, I reccommend one that takes a large fan such as the Thermalright XP-120.

 

[Pottsey]

“It's quite simple, your heatsink isn't good enough, and may possible be making poor contact with the CPU.”
That I can fully believe, which is why I order the Arctic Cooling Freezer 7 Pro from Overclockers. What I don’t get is why it suddenly got so much worse then normal.

After underclocking I am at 68 to 70 ish with 3700rpm which if better then before. But shouldn’t the RPM be maxed out at 4500? I have to be missing something.

EDIT:
Load is now 78c at 4000rpm.

 

[Richdog]

What I don’t get is why it suddenly got so much worse then normal.
.

Could be that your thermal grease has all but dissappeared from between the heatsink and the CPU, and the added summer temps proably aren't helping.

By the way, putting [ quote ] (without the spaces) at the beginning of a piece of text and then [/quote] at the end puts whatever text you're wanting to quote in its own little box.

 

[Psycho Sonny]

reseat your heatsink, and dont use 2 much thermal stuff as too much actuallu insulates the core making it hotter

 

[deadeyedic30]

When was the last time you cleaned your case and has there been any major dust recently in your pc location ?

 

[Pottsey]

“When was the last time you cleaned your case and has there been any major dust recently in your pc location ?“
Not cleaned it since having it over 8 months ago. But looking inside not much dust. In fact a surprising lack of dust I can still read the numbers on the motherboard chips without any sigh of dust. There is dust on the top of the CPU heatsync, didn’t think that would be enough to cause problems but perhaps I am wrong. Will try and get rid of it next week.

Thanks for the idea I didnt think of dust.

 

[Mikey1280]

If you havent cleaned it for 8 months then the heatsink could be clogged up with dust, best to take it off and have a look

 

[Pottsey]

Thanks you all for your help. Everything’s fixed now.

Idle is now 50c and full load seems to be around 72c it changes a little between 70 to 74 depending on the fan speed. Even better it’s now silent compared to before which was a high pitch wine and this is without the lower Vcore to reduce temps.

If anyone has a heat problem I fully recommend the Arctic Cooling Freezer 7 Pro.

One last question would you recommend to leave Vcore on auto or lower back down to 2.6 ish?

 

[Raikiri]

Thanks you all for your help. Everything’s fixed now.

Idle is now 50c and full load seems to be around 72c it changes a little between 70 to 74 depending on the fan speed. Even better it’s now silent compared to before which was a high pitch wine and this is without the lower Vcore to reduce temps.

If anyone has a heat problem I fully recommend the Arctic Cooling Freezer 7 Pro.

One last question would you recommend to leave Vcore on auto or lower back down to 2.6 ish?

Yeah it is a very good cooler... but 1.6v?! No wonder it was getting so hot the stock for those chips is 1.4. Even my 805 at 3.8 only needs 1.475

 

[Pottsey]

Guess that was a brain fart or something. Default is 1.4 when on Auto and I used to lower it down to 1.26 to cool it down though it can go as low as 1.23 stable.

 

[Raikiri]

Ah right, well in that case it is running very very hot.