Q6600 idle temp 45 C; under load reaches 80 C; Help!

justcolam

Honorable
Aug 17, 2012
21
0
10,520
Hello everyone,

I decided to upgrade my old LGA775 socket processor E5400 to a Q6600 (SLACR aka G0 stepping).

I bought it secondhand in my city (25 EUR) and it seems to work fine - didn't have a BSOD in 2-day period yet, but at the same time, I have been refraining from playing any games, because the temperatures are outrageous: it reaches 80 C under prime95 load (and maybe even more, didn't try, stopped it right ahead it went to 80 C). On idle it seems to stay 40-45 C. Light work - 50-55 C. Gaming - 60-70 C. Video conversion makes it go 80 C as well.

Running 2.4 GHZ @ 1.275 V (automatic); didn't overclock yet, because I have faced this temperature problem.

I tried the secondhand fan that I was supplied with (AVC a8022DC; noname brand?), which seems to have some copper on the bottom. The temperatures dropped faster than stock E5400 cooler (the AVC makes way more sound, though), but generally provides the same temperatures nevertheless.

BUT, I have been using some Chinese silicone thermal compound and I've come to a conclusion that this is my problem. I have ordered some Cooler Master HTK-002 thermal grease and it should arrive on Monday-Wednesday.

Another thing I noticed is that it is very hard to make either of the heatsinks "click" on my motherboard (P43T-C51); But I made sure to use enough force to actually make them "click".

At the moment I'm betting on the thermal compound, but it might be that the sensor is faulty (well, the model is 8 years old after all..).

My case is Zalman Z11 Plus - 3x140mm exhaust (1 back, 2 top), 1x140mm intake (front); Everything else on my PC is 25-30 C at idle (including GTX 750). Current temperature in my room is around 20 C; less than 5 C outside (Winter).

Any ideas or suggestions are welcome. I will update this when I receive my thermal compound and change it once again. Thank you everyone.
 
Solution
Many Q6600 G0's will overclock to 3.6GHz with good cooling. 9x multiplier X 400 FSB is perfect for DDR2 800Mhz memory.

The maximum recommended Vcore is 1.5 volts.

Intel's Thermal Specification is "Tcase", which is CPU temperature, not Core Temperature. Tcase for the Q6600 G0 is 71C. Core temperature is 5C higher than CPU temperature due to sensor location. Tcase + 5 makes the corresponding Core temperature 76C.

Please read this Tom’s Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

CT :sol:
The E5400 (65W) cooler is adequate to cool a Q6600 (105W). The original Intel cooler that came with the Q6600 is fine if you don't overclock and the room temperature is kept comfortable. It will throttle when it reaches 100°C and shut down if that isn't enough; I know because that happened to me when the fan stopped working and it kept on shutting down. Get a good cooler and then you'll be able to overclock.
 

CompuTronix

Intel Master
Moderator


I agree with everything you've said, but I'd just like to clarify a fine point.

The original Q6600 was a B3 stepping revision, which was indeed 105 Watts, Tcase 62C, TjMax 85C.
The updated Q6600 is the G0 stepping revision, which is 95 Watts, Tcase 71C, TjMax 100C.

Intel's website previously distinguished between the wattages of these two different processors, but since Intel reorganized their Legacy Core 2 processor tables, this information is no longer specified.

CT :sol:
 
You are correct, Intel don't make a difference anymore. The OP's Q6600 is the same as mine; even if it only draws 95W at stock speed, the E5400 cooler just isn't good enough. I use the stock Q6600 heat sink with a more powerful fan from another Intel HSF that keeps it cool enough (it isn't overclocked). A good cooler should allow a stable 3.0 GHz overclock.
 
That cooler will have no problems at all keeping a Q6600 overclocked at 3.00 GHz cool; it would allow overclocking even more if your CPU doesn't require too much voltage.

Edit: In my first reply I meant the E5400 stock cooler is inadequate to cool a Q6600.
 

CompuTronix

Intel Master
Moderator
Many Q6600 G0's will overclock to 3.6GHz with good cooling. 9x multiplier X 400 FSB is perfect for DDR2 800Mhz memory.

The maximum recommended Vcore is 1.5 volts.

Intel's Thermal Specification is "Tcase", which is CPU temperature, not Core Temperature. Tcase for the Q6600 G0 is 71C. Core temperature is 5C higher than CPU temperature due to sensor location. Tcase + 5 makes the corresponding Core temperature 76C.

Please read this Tom’s Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

CT :sol:
 
Solution