CPU Cooler Guide For Sandy / Ivy Bridge Cpus !!

[rohit32407]

this should help :

noctua NH-u12P SE2 vs corsair H80

EDIT: Ordered Noctua NH U12P SE2 from TheItWares.com

EDIT2: Ordered it at 7 PM last night and still they shipped it last night only..that is just amazing. I would also like to add that they have replied to my every query within 5 mins through mail which is also remarkable.

 

[rohit32407]

One last query. I have Arctic Mx 2 and the paste supplied with Noctua NH U12P SE2 is Noctua NT-H1. Which one of them should I use? and what would be the best way to apply the suggested thermal paste? Would it require manual spreading or just putting on the heatsink over the drop of TIM in the centre of CPU will do the trick?

 

[saswat23]

Yup, A drop of TIM in the centre will do the job.

 

[d6bmg]

One last query. I have Arctic Mx 2 and the paste supplied with Noctua NH U12P SE2 is Noctua NT-H1. Which one of them should I use? and what would be the best way to apply the suggested thermal paste? Would it require manual spreading or just putting on the heatsink over the drop of TIM in the centre of CPU will do the trick?

Use Noctua NT-H1, better than MX2.

 

[rohit32407]

Use Noctua NT-H1, better than MX2.

Done installing the HSF. Ran prime95 large fft test for about 1 hr and temps stayed at max 58 degrees(at stock speed). With core 1 and core 3 running slightly hotter at 58 degrees while core 0 and core 2 at around 53-54 degrees. Googled it and found it to be perfectly normal. What is bothering me are the idle temps with core 3 idling at 39 degrees while core 0 is at 32. Possible mistake in installing the heatsink fan or this is normal as well? basically core 1 and core 3 are running 5-8 degrees hotter than core 0 and 2. Any solution? should i try reinstalling and reapplying TIM?

 

[ashis_lakra]

that's normal behaviour, even my HSF ( hyper 212 evo ) behaves like that. Nothing to worry unless your CPU touches 95C.

 

[rohit32407]

that's normal behaviour, even my HSF ( hyper 212 evo ) behaves like that. Nothing to worry unless your CPU touches 95C.

Ambient temperature is close to 30 as well so i guess idling at 40 isn't that bad. Also the temperatures under 1 hr of torture tests rose by only 15-18 degrees so i guess HSF is doing its job fine. Just the erratic difference in idling temperatures of different cores is bothering me.

here is a screenshot

*img96.imageshack.us/img96/4387/tempskp.jpg

 

[tkin]

Reinstall the HSF, and make sure to apply the TIM properly, one drop in center and then press the cooler on top, wiggle a little bit and screw it down. Cause 2-4c variation is ok, 10c variation is not. Make sure to secure all sides with equal pressure.

Check mine, with 2600k, same cooler, same TIM:
*i.imgur.com/F783L.png

 

[rohit32407]

Reinstall the HSF, and make sure to apply the TIM properly, one drop in center and then press the cooler on top, wiggle a little bit and screw it down. Cause 2-4c variation is ok, 10c variation is not. Make sure to secure all sides with equal pressure.

Will do this tomorrow morning and post a screenshot. Even with stock intel cooler my temps were like this with core 1 and 3 running hotter than the core 0 and core 2(although difference used to be like 5-6 degrees). I was surprised to see that coz core 0 gets used the most still it was the coolest one. God knows why it was so.

 

[ashis_lakra]

Okies, let us know if its done.

 

[tkin]

Will do this tomorrow morning and post a screenshot. Even with stock intel cooler my temps were like this with core 1 and 3 running hotter than the core 0 and core 2(although difference used to be like 5-6 degrees). I was surprised to see that coz core 0 gets used the most still it was the coolest one. God knows why it was so.

Could be a problem with the sensor, the sensors are never accurate, you may have just got one with a faulty sensor, it won't cause any issues, but you may get wrong readings.

The sensor is not for consumer use, doubt if intel covers it under warranty, you might want to rma.

 

[rohit32407]

Could be a problem with the sensor, the sensors are never accurate, you may have just got one with a faulty sensor, it won't cause any issues, but you may get wrong readings.

The sensor is not for consumer use, doubt if intel covers it under warranty, you might want to rma.

There is one more thing that bothers me. The CPU temp in Asus Ai Suite when i was torture testing never went above 50 degrees infact it was stable at 47-48 degrees where as HWiNFO showed core temps to be around 58-60 degrees. Why that difference? Are they reading off the different sensors? Even in the BIOS my cpu temps were around 30 degrees but as soon as i entered windows and opened HWiNFO the core temps were idling at 45max(core 1) 38 minimum(core 2)

 

[topgear]

the lower one is tcase temp ( cpu heat spreader ) and the higher ones are tj ( cpu core temps - ie silicon chips under the cpu heat spreader ) hence the difference in temps.

 

[rohit32407]

the lower one is tcase temp ( cpu heat spreader ) and the higher ones are tj ( cpu core temps - ie silicon chips under the cpu heat spreader ) hence the difference in temps.

some people recommend to monitor core temps where as I found 1 link on intel communities which recommended to monitor the CPU temp(which is lower than the core temps) and never let it cross 72.6 degrees here is the link

Big difference in Core temps i5 2500K during load

Ok so i re-seated the cooler and reapplied the TIM. I have made sure that its seated properly and one thing have noticed is that idle temperatures are still a little confusing but load temps are almost identical maybe 3-4 degrees difference but nothing alarming so I think HSF is positioned correctly. I think there is something crazy going on with the sensors coz at full load with prime95 blend test running the temps are pretty much identical on 3 cores and core 0 maybe 3 degrees cooler. Anyway as long as Load temps are fine I don't really care much about idle temps. Right now I have got it OC'ed to 4.0 ghz with stable temps at 1.250 vcore and LLC to auto.
Just one more question, which temp should I be monitoring? The CPU temp on Asus Ai suite or individual core temps on HWiNFO or realtemp etc...?

here is a screenshot of my current temps at 100% load with prime95 blend test running.

*img339.imageshack.us/img339/4766/loadtemps.jpg

 

[topgear]

^^ individual core temps on HWiNFO

 

[rohit32407]

^^ individual core temps on HWiNFO

ah! in that case I need to install this HSF yet again. My first time surely isn't going to be a breeze .

I guess i am being a little hesitant in screwing down the heatsink. It's written in Noctua's guide that you should screw it until it stops but i was hesitant coz this is my first time and I didn't know how tight it should be and i don't want to damage the CPU by putting too much pressure on it.But this time I will screw it down until it stops just as suggested in the Noctua's guide.

My TIM application is fine AFAIK coz I can see a thin layer of TIM all over the CPU IHS.

I will do the installation from scratch this time. Lets see what happens. Will post the temps here.

P.S. Should i create a separate thread coz I think I am flooding this thread a little too much?

 

[d6bmg]

If you are still gating 58C at stock load, something is wrong unless ambient is ~40C. It might be wrong HSF setting or wrong application of TIM or bad processor (least chance).

 

[rohit32407]

If you are still gating 58C at stock load, something is wrong unless ambient is ~40C. It might be wrong HSF setting or wrong application of TIM or bad processor (least chance).

I have installed HSF from scratch just 30 mins ago and load temp at OC@4.0GHz with prime95 blend test running right now are something like this. Q Fan control is disabled so all the fans are running at MAX i.e
1)Cabinet Exhaust at 2000 RPM
2)Cabinet Intake at 1300 RPM
3)HSF 2 fans(Push-Pull) at 1300 RPM each

*img201.imageshack.us/img201/4766/loadtemps.jpg

P.S. Ambient temp is around 25-26 degrees. Only thing bothering me are the idle temps which doesnt go below 40 degrees. I think 59-60 degrees at 4.0 GHz OC at full load with prime95 are fine?

 

[tkin]

I have installed HSF from scratch just 30 mins ago and load temp at OC@4.0GHz with prime95 blend test running right now are something like this. Q Fan control is disabled so all the fans are running at MAX i.e
1)Cabinet Exhaust at 2000 RPM
2)Cabinet Intake at 1300 RPM
3)HSF 2 fans(Push-Pull) at 1300 RPM each

*img201.imageshack.us/img201/4766/loadtemps.jpg

P.S. Ambient temp is around 25-26 degrees. Only thing bothering me are the idle temps which doesnt go below 40 degrees. I think 59-60 degrees at 4.0 GHz OC at full load with prime95 are fine?

Yup, its fine, you may want to try running Intel Burn Test to find max temp.

 

[topgear]

^^ IBT put more stress than prime95 small FFT test ??

@ rohit32407 - at-least your cpus tcase and core 2 temp has dropped below 40c - check the minimum temp column in Hwinfo and it's 34c and 35c respectively and with all these low load temps yur are good enough to hit 4.5 Ghz now