Core 2 Duo overheating with stock HSF

[dasmokedog]

Originally posted by: TheUltimateNewbie
I installed my Core 2 Duo on an Asus P5B last night. The CPU got up to 67 degrees Celsius while the motherboard reached 45 degrees celsius after an hour or so of heavy installation of drivers, software. etc. I'd heard that the retail HSF for the Duo was going to be pretty bad, but I didn't think it would be this bad. Also, what's with the motherboard getting hot too? Is the heatsink on the Asus P5B bad or something? It's teh vanilla version btw.

Right now my temps are stabilzing at 62C idle and 39C for the mobo.

You know this is elementry day one sh*t!

The most important aspect to thermal transfer is a SOLID contact. This is achived with pressure. The only way to achive this pressure is with a solid connection between your HSF and the CPU heatspreader!

Thermal past is only for filling in the microscopic pits and imperfections of the heat spreader (top metal part of the CPU). Gobs of thermal past is actualy counter-productive.

Again, the most important thing is a SOLID contact. If you can move the HSF then you DO NOT have a good contact and your CPU will get HOT!

Mine is idle at 27 and under 8 hours dual prime gets up to 38c!

 

[dasmokedog]

BTW:

Scrap the crappy stock HSF and spend a few buck on a good HSF and you will not have a space heater.

 

[imported_Truenofan]

i have one question, i plan on going to a c2d system and there's these two heatsinks im looking at, well affordable at least that would work best in my comp. one is an arctic cooling unit and looks reasonably well built. the other is some cheap namebrand one, im not sure, fans are almost the same speeds. but it wont really matter, i can probly take off the fan because there's a 120mm fan sucking air right where the heatsink will be. they both look identicle but one costs consdierably more.

ac unit
http://www.newegg.com/Product/Product.asp?Item=N82E16835186134
cheap-o unit
http://www.newegg.com/Product/Product.asp?Item=N82E16835207001

i would like to mention, this computer will run in a relativly cool room(72F and below w/ low humidity, air conditioner)

 

[Kougar]

Yeah, they almost are exact matches... the cheaper model claims to use a ceramic bearing on the fan even. I'd suggest googling up a quick review or two of both... but if you don't plan to OC then I'd just say grab the cheaper one.

 

[asssie buddy]

I have a 6400 on the P5B.

At idle, it will run around 36 degrees C (Mobo ay 35 degrees). An hour of Quake 3 saw this get up to 41 degrees C.

Important to note I'm running a video card with a heatpipe, so I expected some increase in temps.

The heatsink makes a clear "click" noise during installation to let you know it's in properly.

 

[Anogar]

Yeah, you've definately done something wrong, those temps are way too high.

 

[Golgatha]

Zalman 7700Cu or 9500Cu. You could probably get away with a 7000Cu with LGA775 bracket, but then you might as well get the 7700Cu for the same price as long as it will fit.

 

[asssie buddy]

How much difference does a 2nd case fan really make? For a mid-sized tower, is 1 x 120mm fan adequate?

 

[Kougar]

Only if it is a 152+CFM 120mm case fan! And those sound exactly like you are sitting in the window seat beside a 747 jet engine...

You should only run with a Minimum of 2 120mm fans, and a PSU that has it's own fans to help move air.

 

[SingleAction]

I would like to know, in general, when you are running the stock hsf's, what are the rpm's at these high idle temps?

I found out, when I first built this system, and waiting for my e6400, I put in a Celeron 331.

It also ran hot at idle(43-48c), but the stock fan got close to 4000rpms(sounds like a jet landing at Kennedy airport). On the fan, it says that it is dc12v @ 0.42a. The fan that came with the e6400, is only 21a, and doesn't spin faster then 2400rpm's. I think Intel did this to keep the noise down!

What I've done so far, is rip the hsf out 2 times, and replaced the thermal pad, that I orderd from them to use on another mb with the left over Celeron.

But what I think I'm going to do is use the hsf unit from The celeron with the e6400, and I think that will get the temp's down. rpm' are a good thing!

BTW, my case is a Antec Sonata2, with 2-120mm fans, so that's not the problem.

At this point, I'm not oc, and the room temp is 79, and the cpu temp is,46 and the mb, 36. cpu fan: 2450rpm

So much for the new core2's running cool! I can't see much of a difference from the p4's!

 

[myocardia]

Originally posted by: SingleAction
At this point, I'm not oc, and the room temp is 79, and the cpu temp is,46 and the mb, 36. cpu fan: 2450rpm

So much for the new core2's running cool! I can't see much of a difference from the p4's!

You're running two cpu's @2.0 Ghz, cooling them with one ultra crappy heatsink, in a room that's nearly 80 degrees, and aren't happy with them being at 46C? You should invest in an air conditioner, then.

 

[tastykellogg]

Hey My e6600 also idles at 40C with Scythe Mine. I tried to reseat it a couple of times and it actually dropped from 50C. I haven't done Prime test on it yet cuz it's already idling at 40C and didn't want to overheat it.
Any CPU Fans you recommend for Asus P5B Deluxe Wi-Fi mobo?

 

[Kougar]

If yer going to complain about a hot Core 2 Duo, then I suggest either turning off your motherboard's built in fan control, or not using stock cooling.

After a little work, my 7x476FSB 3.33ghz E6300 runs 40-45c with a Zalman 7700cu cooler. In comparison, my 2.8c Northwood @ 3.4ghz ran 48-54c or so with this same cooler. Both temps taken while running two instances of folding@home. So frankly, I see one hell of a difference between a single core P4 and a dual-core Core 2 Duo!

 

[SingleAction]

So don't you know, no one answered my question!

I asked what your cpu fan speed was using a stock Intel hsf unit, when your cpu temp is high, like 47>60c. Is that so hard?

 

[SingleAction]

Let me reiterate!

Using a core2duo, with the hsf unit it comes with?

 

[eelw]

Here's my results with my E6400 with stock HSF

At full speed - 2500RPM, temp reported by Speedfan 45C and CoreTemp 54C
At 50% - 1500RPM, Speedfan 48 and CoreTemp 58
At 0% - 900RPM, Speedfan 54 and CoreTemp 65

 

[TheSynth]

My stock hsf seems to be doing too good to be true. In ASUS Probe and Speedfan it always lingers around 36C.

 

[eelw]

Addition to my earlier temperature post. Since I just finished my encoding, here are my idle temps

100% - 37/42
50% - 39/44
0% - 42/47

 

[SingleAction]

eelw;

Thanks for the info.

On your last post, the set of numbers, first being the speedfan reading, and the second being the Asus probe reading for cpu temp?

And the percentage of fan speed on the heatsink fan, this is the speed that it's thermostat regulates, in the Asus probe cpu fan speed?

 

[eelw]

Fan speeds manually controlled with SpeedFan and the 2nd set of temperatures is using CoreTemp.