i7-3770 overheating in full load

EK2001

Honorable
Feb 20, 2015
19
0
10,510
Hi,

My CPU hits 97 degrees C during prime95. I changed the thermal compound 2 or 3 months ago. My CPU cooler is Cooler Master T2 Blizzard mini and my case is Cooler Master RC-K380. What can I do to reduce the temperature?
 


If the HS is properly seated and the fan working as a temporary solution (and 97º is in the high risk zone, you are risking the processor) could increase the fan speed at the bios.

But i will remove the HS, clear the thermal paste, put a new one and seat the HS again as it sounds to me a bad fitted HS (improper preassure, or too much/too few paste).
 
This is normal with that cooler; it's designed to replace the stock cooler, not to be much better. Installing a better cooler will resolve your issue, but at 97°C it doesn't throttle. What's your ambient temperature? Mine runs cooler with the stock cooler, but I have better case and no GPU to generate additional heat.
 

My room temperature is about 25°C. Replacing my case can make difference? Because my case is small and it supports only 5 fans. And I already installed 4 of them.
 
You need to use Prime 95 Version 26.6 Or below, said here:

http://www.tomshardware.co.uk/forum/id-1800828/intel-temperature-guide.html

Intel tests their processors at 100% TDP. Prime95 Version 26.6 Small FFT's is the standard for CPU thermal testing, because it's a steady-state 100% workload which runs Core 2 processors and Core i variants with Hyperthreading within +3% TDP at stock settings. No other utility so closely replicates Intel's test conditions. This is also the utility that Real Temp uses to test Core temperature sensors.

Caution: Do NOT use versions of Prime95 later than 26.6 on Core i 2nd through 6th Generation i3, i5 or i7 CPU's which all have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95 such as 28.9 run AVX code on the CPU's Floating Point Unit (FPU) which causes unrealistic temperatures up to 20C higher. The FPU test in the utility AIDA64 shows similar results.

Core i 2nd Generation i3, i5 and i7 processors are less affected due to having fewer transistors in a larger Die with greater surface area, and a soldered Integrated Heat Spreader. Core i Pentium and Celeron variants, as well as all Core i Previous (1st) Generation and Core 2 processors are unaffected since they do not have AVX instruction sets.


Just for reference (The above)

If you believe that it is overheating, still try a different software for stress testing your CPU if you wish to see more accurate results, something like OCCT will assist you.

With your CPU cooler, are you sure the fan is running correctly along with the rest of your case fans? I know that CPU fans can be quite hard to see if they're running correctly.

You could also set up a more agressive fan curve if you wish.

PS - The 3770 does have AVX, so try Prime95 Version 26.6 or below :)
 


You better go read up on the processor on Ark then if you think it doesn't support AVX extensions.
 
I have one. The AVX instructions can cause heat issues with newer Intel processors; not with the i7-3770 that doesn't support them. Monitoring with Intel XTU while running P95 Small FFTs for 5 minutes with the stock cooler:

28.5 Build 2 - Peaks at 85°C
26.6 Build 3 - Peaks at 82°C

I wouldn't call it a huge difference. Results when using a newer Intel CPU are significantly larger. Testing is better than presuming the results.
 
I decide to change my cooling. My case supports air coolers up to 155 mm and 120mm radiator only. Should I go with Fractal Design Define s + hyper 212 evo or stick with my case and buy Corsair H80i?
 


You need to read up on your chip, it DOES support AVX extensions, Intel, who makes the chip, even says it does and posts about it.
 

If it's available, I suggest the Cryorig H7; it's slightly better than the 212 evo.
 

It's not available in here. So, should I go with the case + air Cooler?