Intel 640 fan and heating issues

[Armmmin]

I'm building a new system and having a major heating issue with the cpu:

Intel 640 with oem fan (3.2 with 2Meg cache)
Coolermaster Case TAC-T01-E1C
Neopower 480 power supply
ASUS P5AD2 Deluxe


My problem is that when I close the computer case, within few minutes the cpu fan speeds up from the normal 2700-2900 rpm speeds to 4500 and it sounds extremely loud.

Is this an issue to related to a bad power supply or the cpu fan needs to be replaced?

I'm not overclocking or anything like that.

thanks

 

[paparazi]

This CPU is pretty hot and the stock cooler is just working hard to cool it down.
If noise is a problem then look at replacing the stock cooler with something like:

http://www.coolermaster-europe.com/...l=RR-UNH-P0U1&other_title=RR-UNH-P0U1Hyper 6+

Martin

We like members to GIVE and not just TAKE.
Participate and help others.

 

[franklin97355]

If the fan runs at the slower speed when the case is left open you need to look at getting move air movement in and out of the case when it's closed.

 

[paparazi]

franklin97355
Well I would agree to some extent but this is an excellent aluminium coolermaster wave case that already has several standard fans, I doubt you could improve it much.
The real problem lies with the extremely hot P4 and it's reputation as being a bit of a furnace.
If Armmmin lives in a warm climate????? the cooler is acting pretty normally by spinning at full rpm once it reaches a certain temp.
A better (quieter) cooler may be his only option.
Martin

We like members to GIVE and not just TAKE.
Participate and help others.

 

[rvnguy]

All,

Armmmin never actually stated that he is overheating but only that his HS fan runs fast. What are your core temps with side open vs side closed?

I tend to side with franklin97355, in that if the CPU appears to run cooler with the cabinet open then the air movement (and paths) are suspect.

The best CPU heatsink is useless, if the air around it is too hot. The hot air obviously needs to be evacuated from the case. The capicity of air to cool is functional upon one major fact and that is the Difference in temp. Blowing 36CFM of 40c air on a 40c CPU will provide little cooling increasing this to 80cfm will do very little more. The CPU fan needs the coolest air possible to provide the best efficiency.

Heatsink performance is rated in °C/W or thermal resistance. OEM HS are not often rated where one can find it. Generally, a lower TR is favorable but it is difficult to compare one Mfg #'s to another. There are several good examples of HS that are rated at .20-.30 °C/W (as the one ref'd by paparazi) and one of these will assist in cooling after the air temp issues are addressed.

Please get back with your temps.

RVNGUY

 

[micker377]

Does this case have a "side" fan near the CPU? If so, make sure the fan is blowing air the same direction as the CPU fan. I've found many cases blowing the air out. Unfortunately, the CPU fan blows down, creating a dead air situation above the CPU.

 

[Armmmin]

<paparazi>

Well I want to agree with you on that, but I have hard time believing the intel fan will run this hard to keep the cpu cool, at 4200 rpm, its extremely loud. Not only is the fan loud, but the whole case starts vibrating. But I may still get a coolmaster cpu fan if everything else fails.

<franklin97355>

As paparazi stated, its a very well built case, I'm not sure what else can be done to move air.

<rvnguy>

The temps are the same because the fan is spinning alot faster. Therefore with the case open depending on the load, its around 31C to 36C and with the case closed after 3 mins of operation at 4200 rpm, it was at a solid 36C.

<micker377>

Yes, the side fan is blowing air OUT of the case. Is this not correct?

I think for optimum air movement, since there are two fans in the front of the case sucking air IN, then you need to have a way to suck air out to have a good airflow, therefore with the side fan sucking air OUT sounds to be the correct way.....?


I found something interesting. This motherboard comes with an option that is called IQ-FAN which if enabled THEN its suppose to control all fans including the cpu fan. This brings up the question to why would the cpu fan automatically spin higher with the case closed since this option is DISABLED by default.

Second, when I enabled this option, with the case closed, the fan did not go any higher than 2250 and still kept the same temp. BUT with the case closed, the max it went up to was 2700 and the cpu temp was close to 50C. I only ran this for 5 minutes since I did not know if it was safe to have the CPU at this temp. It seemed like the option is working backwards in this case??

TIA

-ARMIN

 

[micker377]

Yes, the side fan is blowing air OUT of the case. Is this not correct?"

No. It is doing exactly what I said. You have to physically remove the fan (four screws), and flip it around (reversing the wires won't work, the fan only spins one way), so the air blows down onto the CPU. If you have mounting screws only on one side of the fan, mount it on the outside (ugly, I know), just to see if it helps. If so, you may have to buy a new fan, or see if one of the other fans can be used in it's place.