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2500K runs 80+ degrees in Prime95

post #1 of 29
Thread Starter 
When running Prime95, my CPU temps quickly jump up to over 80 degrees Celsius in 1 minute. I haven't stressed it further to see if it would go higher, naturally.

I'm running:

2500K at 4.2GHz (42 multiplier), 1.285 volts
MSI P67A-G45 (B3) [BIOS v1.19]
CM Storm Enforcer with stock front 200mm and 120mm exhaust
Xigmatek Loki SD963 cooler (92mm fan)
Arctic Silver 5 thermal paste

I have a few theories on what could be causing these problems.

1. Need to ramp up case fans (currently running at 75%, according to finicky MSI BIOS).
2. Need to ramp up CPU fan (3000 RPM).
3. Too little thermal paste. I just put a blob in the middle of my CPU, but I feel like it was too little (not a pea-size blob).
4. My motherboard is not really well-built for OCing.

My CPU and mobo take a minute to get to 80 degrees.

Case is in a wide-open area and airflow should be excellent.

I also haven't run any CPU-intensive programs yet.

Could anyone help locate the problem/fix the problem or does anyone have the same motherboard/experience as this?

Thanks.
post #2 of 29
It sounds like you need to reseat your cooler. What software are you using to get your temps?
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post #3 of 29
Pea sized blob?! That is way too much.

Reseat your cooler with a SMALL amount of thermal paste and turn those fans up when your loading it up.

If you have a decent amount of thermal paste you might have an air bubble acting as an insulator causing temps to rise. Also, not the best cooler in the world for high 2500k overclocks. But should suffice for your OC.
post #4 of 29
Doubt it's 1, 2 or 4. It might be 3. I doubt you have too much TIM though, but if you did it would definitely have an insulating effect and significantly increase your temps.

Try a blob the size of an uncooked grain of rice on the center of the 2600K's heatspreader.

When you're removing the heatsink to reseat it take a look at the spread of the AS5 on it. Make sure the distribution isn't too thick and that the spread/surface area is sufficient.

If you used too little AS5 it will look like it hasn't spread enough (doesn't spread over most of the surface area of the CPU heatspreader or the heatsink contact surface). If you used too much it will appear thick and you might have some running off the edges of the CPU's heatspreader or the heatsink surface.
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post #5 of 29
Quote:
Originally Posted by deafboy View Post

Pea sized blob?! That is way too much.
Reseat your cooler with a SMALL amount of thermal paste and turn those fans up when your loading it up.
If you have a decent amount of thermal paste you might have an air bubble acting as an insulator causing temps to rise. Also, not the best cooler in the world for high 2500k overclocks. But should suffice for your OC.

Reread the OP.
Quote:
Originally Posted by Pencilhead View Post

I just put a blob in the middle of my CPU, but I feel like it was too little (not a pea-size blob).
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post #6 of 29
Op disregard the people saying your using too much or too little thermal paste..its obviously not this. Im gonna be frank...its your cpu cooler! Its not the best cpu cooler and im betting thats why your cpu is getting too hot. You need to upgrade your cpu cooler to something like the Prolimatech megahalems, corsair H80, Noctua D14...All of which btw use at least a 120mm fan as apposed to your smaller 92mm fan.

Honestly a stock cpu intel cooler would perform barely worse than yours, and thats cos its not built to be used on a overclocked system. I appreciate your overclock isnt the biggest, but your cpu cooler obvioulsy cant keep up.

For £50, you can have a decent air cooler than will keep your 2500k at or under 60C whilst under full load at voltage above what your using now. Proof?

340

That was my old 2500k running at full load, notice realtemp shows 42 hours of temp monitoring and the highest it got to was 63C at 1.41v.
post #7 of 29
Quote:
Originally Posted by Pencilhead View Post

1. Need to ramp up case fans (currently running at 75%, according to finicky MSI BIOS).
2. Need to ramp up CPU fan (3000 RPM).

I'm not sure about the case fan, I don't think you will get any improvement by changing them to 100% (considering the airflow is not too restricted in the case).
What speed is the fan spinning when the CPU is at 80 degrees? It should spin at maximum speed if it's plug into a CPU (4 pins) motherboard plug.
post #8 of 29
Quote:
Originally Posted by $ilent View Post

Op disregard the people saying your using too much or too little thermal paste..its obviously not this. Im gonna be frank...its your cpu cooler! Its not the best cpu cooler and im betting thats why your cpu is getting too hot. You need to upgrade your cpu cooler to something like the Prolimatech megahalems, corsair H80, Noctua D14...All of which btw use at least a 120mm fan as apposed to your smaller 92mm fan.

I'm skeptical. How could a tower-style HDT cooler will perform worse than the stock heatsink unit of the Sandy Bridges AND take one minute to get to 80'C on a chip running at 1.285v? I find it difficult to believe that one minute to 80'C wouldn't be indicative at all of the possibility of poor TIM contact.

There's a large difference between "not the best" and "terribad" and the performance the OP purports is frankly terribad. It falls out of spec of the critic reviews of this cooler.

While the OP certainly probably could've done better with even a lowly Hyper 212+, this is by no means that bad of a cooler so as to inspire such a large temperature delta in such a short period of time.
Edited by friend'scatdied - 12/12/11 at 10:37am
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post #9 of 29
Thank you $ilent. I'm tired of everyone pointing to re-applying the TIMM everytime temp's are high. Seriously, every thread regarding toasty temps.. the majority blame the TIMM method used. That is rarely the root of any problems and rarely going to make a large temperature difference even if not done so well.

It's usually comes down to the cooler not being mounted correctly/evenly, or, the cooler being crappy. In this case, I think the Loki is crappy.

Don't be afraid to run Prime95 longer, OP. See if the temperatures atleast level out in the low 80's? When I run prime, I immediately jump to ~64c @ 1.30v at 4.6ghz. However, It levels out and stays there. The Loki isn't so great so you will likely climb higher and higher, but you can atleast see what it can do.


If the Xigmatek is mounted correctly & evenly, it's the Loki being subpar.
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post #10 of 29
Quote:
Originally Posted by friend'scatdied View Post

I'm skeptical. How could a tower-style HDT cooler will perform worse than the stock heatsink unit of the Sandy Bridges AND take one minute to get to 80'C on a chip running at 1.285v? I find it difficult to believe that one minute to 80'C wouldn't be indicative at all of the possibility of poor TIM contact.
There's a large difference between "not the best" and "terribad" and the performance the OP purports is frankly terribad. It falls out of spec of the critic reviews of this cooler.
While the OP certainly probably could've done better with even a lowly Hyper 212+, this is by no means that bad of a cooler so as to inspire such a large temperature delta in such a short period of time.

This is how temperatures go when going from idle to full load. My 2700k idles at 33C, but as soon as I put it to full load the temperatures shoot up to 70C. Thats more than double. And thats what always happens when you go from being idle to full load such as folding@home or using prime95. Dont ask me how companies can make thier products so successful, whereas others make similar designs and the performance varies by wide margin. Its obviously dont to design and how its made. The point is a stock intel cooler will put your temps at and above 80C without much more voltage, and sadly the OP is having the same problem with his aftermarket cooler.

I would be willing to send him my cpu coolerif i could just to prove its that and not the Thermal paste that is the cause here.

I appreciate there are other things here that will be contributing such as the fan he is using on the cpu cooler, 92mm and im betting it wont be shifting much air. What does his case look like? It could be cluttered with cables and that could be why the air is hot in his case. His ambient temperature could also be quite high. Regardless of these things I still stand firm when I say its down to his cpu cooler.

The best and cheapest thing he could do at the minute if possible would be to buy two new 92mm fans or even just one so that he could do push/pull configuration on the cooler and try get better temps, aswell as post a pic of his case to see if it is cluttered.
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