Really High CPU Temps

[Gamingphreek]

Im running a CPU torture test through Prime 95. Well i was just listening to music when my computer started going haywire. I look over at it and my temp alarms throuhg asus probe are going off. Im pulling a temp of 72C. Yeah... i dont know what to do. However, my chip is clocked at 3000+ speeds (2500+ @ 3000+) and i am using stock cooling. I just ordered a Panaflo L1A and a Thermalright SLK-947U. Will my temps drop drastically like somewhere in the upper 30's or 40's. Also could asus probe be off. If i stick a temperature probe in my heatsink the temp i get with that is 54C. Which do i listen to and what should i do about this.

Btw: i just finished clipping the front grills on the case (Chieftec Dragon) which were clogged with dust... should my temps have gone down and no up!?!?

-Kevin

 

[jhurst]

I doubt you will see a 30C drop in temperature just with a change of your HSF. The 947U is a good HS, and it will drop your load temps around 10-15C I would estimate (smaller change in idle temps). The little probe you are sticking in your HS is not a very good measure at all since you are measuring the temp inside your HS, not your CPU. The CPU diode is usually right underneath the CPU die.

 

[Gamingphreek]

But could my M/Bs readings be off? BY say 10C. I mean 71C is dangerous. 9C more and im in the oh sh!t zone.

Anything i can do.. My ambient room temps is something like 38C (78F).

-Kevin

 

[echow87]

heatsink not fit right?

Cuz stock cooling and under load for that kind of overclock is about 55c. I did run a cpu at like 75c - 80c for over a week though, luckily nothing happened.

 

[nboy22]

I'd probably not overclock any more until you get that heatsink and fan just to be safe. overclocking is simply not a good idea with stock HSF's anyways.

 

[Nebor]

If it's stable, don't worry about it. Temperatures are made up by your motherboard. Does the heatsink feel warm?

 

[Cerb]

...and what's the case temp?

 

[Gamingphreek]

My case temp is 30C.

Yes my HSF is on right i have check a thousand times. I am running a chieftec dragon case. Would anyone recommend turning the Fan so that it blows away from the CPU. Maybe it will work better that way. Anyone thing that is safe?

-Kevin

Edit: My HS is extremely hot. I think my thermal diode is broken though. Ok this isn't exact but it is pretty damn close. I have a temperature monitor ofr the front of my case with a long cord and a thermal sensor at the end. I put it completely in the center fo the HS (i stuck it through one of those cracks), so it is as close to the CPU as i could get it, and the reading i got was 52C. Could this mean that my M/B's temperature diode is broken.

 

[Nebor]

Your motherboard is just giving inaccurate temperatures. Very few are actually acurate. Mine's like 18C off.

When you say the HSF is extremely hot, do you mean too hot to keep your hand on? Because that would be like 72C, I think.

 

[Cerb]

With that case temp in a dragon...I agree with Nebor.
Your HSF should be too hot to hold your finger on for 30 seconds, but 5 seconds or so shouldn't be uncomfortable. If that's so, you've got good contact, and probably good cooling (maybe uncomfortable for 5 seconds under load).

Silly Asus, accuracy is for kids!

 

[Gamingphreek]

If my HS is that hot that means that i have good contact. So Asus is probably way way off in there temp readins.

However out of curiosity what would happen if i put the fan on the other way. So that it blows hot air out. If you now the setup then youll know that there are 2 80mm fans right above it for exhaust so its not exactly blowing cool air on the HS. Could it help me if i flipped my fan?

Now im less worried because i think Asus is way off like you guys said but nonetheless, but i wanna see if i can help the situation.

-Kevin

 

[Frazas]

Couldn't it be that the temp being read is the one in the internal CPU diode?

 

[Cerb]

Originally posted by: Frazas
Couldn't it be that the temp being read is the one in the internal CPU diode?

Could be. If so, he will get a 30C drop from the SLK.

 

[Gamingphreek]

I just looked at Asus probe and im getting a reading of 58C. Now it seems a bit better. the reading could be about 5-10C off right? If so my new HSF should have my proccessor in the upper 30's low 40's correct?

-Kevin

But again would it help if i flipped my fan.

 

[Gamingphreek]

Originally posted by: Cerb

Originally posted by: Frazas
Couldn't it be that the temp being read is the one in the internal CPU diode?

Could be. If so, he will get a 30C drop from the SLK.

What does that mean lol? I know the AMD chips have built in temperature sensors...is that what your talking about.

30C drop sounds awesome... but unlikely

 

[Frazas]

Originally posted by: Gamingphreek

Originally posted by: Cerb

Originally posted by: Frazas
Couldn't it be that the temp being read is the one in the internal CPU diode?

Could be. If so, he will get a 30C drop from the SLK.

What does that mean lol? I know the AMD chips have built in temperature sensors...is that what your talking about.

30C drop sounds awesome... but unlikely

Yes, a 30C temp drop is unlikely but a 15-20 is probable.

And AMD chips do have the internal diode but many boards don't read it. Most of them read from the diode beneath the CPU (in the center of the socket).

 

[Gamingphreek]

So you guys are thinking that maybe my board is reading the internal diode instead of the one under the socket?
I guess i could shove my temp sensor under the HSF and on top of the CPU right on the core and see what it reads. But then i gotta clean em both off and reapply thermal grease.
I guess its just better to wait and see what my SLK brings. Also could my thermal grease have something to do with it. Im not using arctic silver... im using some cheap reference compound thats is made by Antec. Would switching to Arctic silver furhter lower my temps?

Still nobody has answered my question i have bolded in the other topics . Would flipping the fan around make any difference.

-Kevin

 

[Frazas]

Originally posted by: Gamingphreek
I guess i could shove my temp sensor under the HSF and on top of the CPU right on the core and see what it reads.
-Kevin

Do not do this!! The best way to do it is to put it on the side of the core with beingon top of the CPU. If youy put it between the CPU and the heatsink you won't get any contact and your processor will fry in a matter of seconds.

 

[Gamingphreek]

oh yeah lol i forgot. Well then everything comes down to 2 questions until monday when i get my SLK.

1. Would flipping the fan do anything positive or negative?

2. Would switching thermal paste to arcitc silver do anything?

I guess i could go as far to shove the sensor next to the core but still i would have to reapply the thermal grease . Ill wait and i might do that with my SLK.

-Kevin

 

[Cerb]

Originally posted by: Gamingphreek

Originally posted by: Cerb

Originally posted by: Frazas
Couldn't it be that the temp being read is the one in the internal CPU diode?

Could be. If so, he will get a 30C drop from the SLK.

What does that mean lol? I know the AMD chips have built in temperature sensors...is that what your talking about.

30C drop sounds awesome... but unlikely

Yes. Most motherboards use a thermistor under the socket, only touching the bottom of the chip's packaging. The internal sensor, howevr, will be reading more accurately, and usually higher. On stock cooling, that reading 60-75C would be normal in a typical case and using the thermal pad.
if it is an accurate reading of the diode, the SLK will be all but garunteed to give a 15C drop. 30 might be an exageration, though .

I'd recommend Arctic Ceramique for compound. Very easy to use, AS3 temps. Going to a big monster like the SLK-947U, it will help. With big coolers and small dies, it has been shown to give as much as a 7C improvement over the generic stuff. Not much of a difference for something like the stock coolers, though (the benefit is directly proportional to the difference of the contact surface on the CPU and the mass and surface area of the HSF). Acetone would be the best thing to use to remove the pad, but be careful, as it could do damage to the rest of the chip, only use it on the die itself and in small amounts at a time.
Flipping the fan may help, but could also hurt. It won't be the difference between 50C and 70C, that's for sure. Blowing is probably best.

 

[Frazas]

Originally posted by: Gamingphreek
oh yeah lol i forgot. Well then everything comes down to 2 questions until monday when i get my SLK.

1. Would flipping the fan do anything positive or negative?

2. Would switching thermal paste to arcitc silver do anything?

I guess i could go as far to shove the sensor next to the core but still i would have to reapply the thermal grease . Ill wait and i might do that with my SLK.

-Kevin

Answers:

1. Probably not. The only heatsinks that I know that benefit from that are the Alphas and they were designed like that.

2. Yes!!

 

[Gamingphreek]

Why wouldn't it help though. Isn't there a sort of vacuum overhead as i have 2 exhaust fans right there. Even if it was sucking air in wouldn't it be hot air as it is already on its way out of my case.

Any good local retailers have decent prices for Arctic Silver (III i guess). I want a decent price too... i think Newegg has it for what 4.999 im hoping for something not too far off from that locally.

Also in a P4 you should definately still use thermal grease right? My father isn't and his chip is still running at aroun 124F (cant remeber C sry).

-Kevin

 

[Cerb]

When the SLK comes in, try fdlipping it--you should be able to mount and remove the fan w/o messing with anything but the two clips, so you could test it.