fans question

[ya basta]

In cooling the rig in my signature, I have one fan mounted in the chasiss, blowing out. It is hooked up to chasiss1 on the mobo. The mobo configuration utility shows average idle temps of 39 on the mobo and 42 at the processor. It also has a reading for power(fan?) turning at 0 rpm.

I installed speedfan over the weekend and it indicates 3 fans:

Temp1: 3462 RPM 40 degrees
Temp2: 1563 RPM 38 degrees
Temp3: 0 RPM 60 degrees

I'm not clear on what the third fan is. The video card has a fan, but it appears to be turning. Does it have a separate fan controller that I should have hooked up?

Thanks for any insight

[Panama Red]

Speed fan is detecting and displaying the speeds of connected to the mobo fan headers. You probably have 3 headers but only two in use. Temp1 is most likely your cpu fan and temp, temp 2 is your case fan and mobo temp. Since nothing is connected to the 3rd header, temp 3 is invalid. Unless you have separate temp sensors that you have placed in the case. Did you place a sensor on the vid card by chance? The vid card fan won't be detected unless it is somehow connected to a header that is monitored by your fan controller.

[ya basta]

No, there isn't another fan installed and I haven't installed a separate temperature sensor. While the fan isn't there, the temperature reading associated with it goes up into the 70's under load, so I guess there is a sensor on the motherboard near the video card? Should I install a third fan?

Thanks for the help.

[Panama Red]

I just did a quick read on how Speed fan works. I suspect Temp3 is your Northbridge chip. Does yours have a fan on the NB or just a passive heat sink? Take a look at "How it does its job" at this link.

http://www.almico.com/speedfan.php

[ya basta]

Mine has a heat sink.

Should I worry about the high temp?

[Panama Red]

Originally Posted by ya basta Mine has a heat sink. Should I worry about the high temp?

I'm not sure that the reading you're seeing is the NB temp. It's a bit high if it is. Most NB temps I see on the OC forums area little lower than the cpu temps. That would make 60 quite high compared to a cpu temp of 40. Maybe someone else has some definitive answers on the subject. I haven't used Speedfan before so I can't speak from experience here.


Just went back to some notes I kept on my OC project from last year. I had a sensor right next to the NB and a fan mounted on the NB. With the system fully loaded running Prime95 and the fsb at 235 on a mobile Athlon XP 2500+, the cpu temp was 57C and the NB temp was 47C. I increased the NB fan speed an dropped the temp to 45C. 60 doesn't make sense for a NB temp. Not sure where that reading is coming from.

One forum poster I found mentions using Asus AI Booster to monitor chipset temps on an A8N-SLI Premium.

[ya basta]

I use AI booster and it doesn't report this fan or temp. I was unaware of it until I installed speedfan.

The nb chip is just west of the chasiss fan, but the temp in question is unmoved by manipulating the speed of that fan. I wonder if it isn't the video card.

Thanks again for your help.