Temps Problem (old pro needs fresh ideas...) *FIXED* thanks mechBgon and Big Lar :)

[MichaelD]

I don't get it. Higher fan rpm = better airflow = lower temps. That's the way it's always worked...now it doesn't.

I have an Antec 1040. Aside from the dual-fan PSU, I have two exhaust fans and one intake fan.

I have the fans all hooked up to the "Fan Only" speed controlled connectors on the Antec Trupower 430 PS. The fans are basically 7-volted. The spin very slowly, but move air. You can feel air being sucked in thru the front grill when you put your hand there. You can feel the air coming out of all three exhausts. (PSU and case fans)

I felt my case temps were a little high, so I decided to take my fans off the speed control and run them straight...much more noise, but lower temps.

Well, the noise went up and so did the airflow. You could REALLY feel air coming/going on both ends...but my temps didn't drop. Not a single degree C! Neither the CPU OR the CASE temp.

What happened here? Was it just hot in my room that day?

Right now, room is 76F. Case temp is 102F. CPU is 113F. I have zero stability probs. I have a big CPU HS which radiates massive heat, along with my overclocked 9800, which is also a space heater. Any ideas? Should I try it again?

 

[mechBgon]

Odd. Try again but this time leave the side-panel fan turned off, so the case's airflow pattern is purely front-to-back. Also check to make sure none of the fans is facing a different direction than you intended... they exhaust over the strut side (I'd say "the label side" but they have labels on both sides).

 

[MichaelD]

Thanks Mech. All my fans are facing the proper way and I don't have a side fan at all. OLD Antec 1040...not the snazzy new/nice one.

This is why I've no idea what's going on. My cable tying job is decent...everything's out of the way....

 

[Big Lar]

It could be the Placement of the sensors on the board, that coupled with Blowing the cpu fan at the heatsink and can throw off temps quite a bit.

 

[MichaelD]

I double checked and all the fans are definitely facing the right way. Not that I'm infallable...but I'm too neurotic/anal about these things to NOT check it a dozen times before putting it together in the first place. I knew I was right...but hadda check!

It could be the Placement of the sensors on the board, that coupled with Blowing the cpu fan at the heatsink and can throw off temps quite a bit.

Thanks, Big Lar. Interestingly, I was thinking this as well. The "case sensor" is really "the board sensor" and I'm not sure where on the board it's placed. If it's crammed down there near the AGP socket, it's going to be hot due to the videocard.

I have a medium speed fan on the CPU HS and it blows a decent amount of air around as well.

OK, I've had the case closed up now for about ten minutes and the temps have DROPPED as they should. x 1,000 WTH?

Temps are now 96F (36C) case and 109F (43C) CPU.

Which tells me that the case fans are doing their job. Soon, I will swap out the AX-7/80mm med speed Antec for a SLK-900/92mm Panaflo medium speed. That should net me some more cooling, huh? :evil:

Thanks again for the help. *shrug* I guess I had a fluke that first time out, eh?

 

[Big Lar]

Well, Not that I feel I helped much, but it is nice to see you have it figured out.

 

[MichaelD]

Originally posted by: Big Lar
Well, Not that I feel I helped much, but it is nice to see you have it figured out.

Well, you threw "The Thinking Man's Spin" on it, which is what I would've done in a similar thread. It struck me as cool.

 

[slaves123]

i think you airflow is perfect even with the fans running at 7 volt, as the temperature don't decrease i suppose you have the same temperature inside the case and inside the room, you have reached the maximum from your HSF and if it is a very very good heatsink fan, you have rached the maximum of air cooling, good luck