How to lower temp with case closed?

[freshy98]

Hi all,

Currently I'm running an AMD XP 1700+ (1470MHz) @ 1639MHz. With my side panel away from the case it runs 100% stable.
Idle temp is 32C and full load is about 35C. Very Nice I think.
Cooling of the CPU is done by a SK6 and a Delta38 blowing towards the SK6.

Problem: When I put on the side panel the idle temp is 35C and I can't even run a stability program like the Burn in wizard from Sandra. The PC hangs or reboots. You name it.

I have a 92mm fan in the back of the case sucking air out of the case, and a 120mm Papst fan (80CFM) sucking air in to the case and a second 92mm fan in the side panel sucking air out of the case.
What would you guys think about reversing the 2 92mm and the 120mm fan? Meaning to suck air out of the case by the 120mm, and sucking air in to the case by the 2 92mm fans.
My idea behind this is to provide more air for the Delta fan to blow over the SK6.

Does this sound logical or are there flaws?

Please let me know. I think that without the side panel, thus lower the temps of the CPU, will get me some higher then I'm already are.

Thanks in advance,

freshy98

[Hoot]

I think your idea has great merit. Try it and see what results. You always want your inflow cfm to be somewhat greater than your outflow fan(s) are rated at, if, for no other reason, than the fact that the PSU also has an exhaust fan that you need to factor in, but equally as important is that a slightly positive case pressure is known to help reduce the drawing of dust in through every crack and crevice in the case. I am a big proponent of bringing the case cooling air in through the fans that are closest to the CPU and its HSF. Exhaust it as far away from the intake fans as possible. Forget the age-old tenet that Hot air rises. That only applies in a fairly calm (read no airflow) environment. The slightest breeze will defeat the less powerful effect of convective airflow. Observe a cigatette indoors. The smoke (hot gases and ash) rises straight up, but in the presence of even a slight breeze, it deflects in the direction of the airflow. The hot air in a PC behaves the same way. Before I converted to water cooling I observed several degrees of lower CPU temps using the upper rear fan(s) as the intake and the lower front fan(s) as the exhaust. Let us know how you fare.

Hoot

[Acko]

Hi

I have experimented with simular set up to you in the past & I would be very suprised if you don`t get a good cooling temp, by using your side fan so as to push more air into the case at the moment you seem to be pulling out to much air so the flow/balance is not correct.

So to re-cap front fan sucking air in rear fan & psu sucking air out & side fan blowing air into case.

Hope this combo. works for you.

Acko

Asus A7V266-E
XP1600+ / Alpha8045 Y.S. Tech fan
512 Crucial DDR
30 Gig Diamond Max+
Geforce 3
Antec 350 case/psu
Iiyama 192 Monitor
Videologic Sonicfuty
Plextor 12/10/32A

[Maximus Nickus]

Get a bigger case!!!

I've got a HUGE (over 1m high!!! Had to re-assemble my desk!!!) Chieftec Case with over 400CFM going around it, I can get my 1Gig to 1.4 whereas it would only hit 1.1 before!!

Full load is 34C!!!

My room temp is 25C, hot for a English Winter!!!!

[freshy98]

I tried reversing the back fan and the front fan, but it become unstable :(
I couldn't reverse the side panel fan yet because I need to drill the mounting holes bigger before I can attach it. Will do that next week.

And I think a chipset cooler on the 266A chip wil do alot too.

The Papst really cooles my motherboard. About 5C when blowing over it. So I really need that side panel blowing towards it. Will test things next week. untill then the saide panel will be off.