Asus A8V Fan monitor Issues

[dino8031]

I have an Asus A8V Rev2, Factoryu BIOS 1008 board with the following hardware installed:

Athlon 64 3000+
2- 512 Meg Sticks Mushkin Green Cas 2.5 blue slots, dual channel
Nvidia GeNForce 5200 128 Meg Video
Antec Sonata with Antec SmartPower 380 watt Case
PS sensor is plugged into "Power Supply" 3-pin
1-120 MM case fan (not plugged into the motherboard)
1- 80mm temp controlled Artic cooling fan (3pin, plugged into "Chassis Fan" 3-pin
1- Arctic Cooling TC CPU cooler, temp sensor disabled, plugged into CPU 3pin on motherboard. (I disabled the sensor according to instructions because it was only running at around 600 rpm and keeping the idle temps in the 40's)
Windows XP Pro SP2

With this setup I'm getting some very odd readings with Asus Probe 2.23.94 and in the BIOS hardware monitor. (both match) I've uninstalled and reinstalled the utility at least a dozen times, including different versions with the same results.

CPU and Power Supply readings are fine, at around 2400 and 1500, depending on load.
Although I occasionally get readings of zero with both.

Chassis fan reads somewhere between -25000 to 0 to + 25000!

The readout remains the same weather Cool and Quiet is enabled or not. It is currently enabled.

The odd thing is that checking the settings in the BIOS under "hardware monitor" is extremely slow, probably a 15 second lag to toggle between each setting. The rest of the BIOS setttings work perfectly.

So, what's up? Any theories?

I have not tried reflashing the bios. The machine runs beautifully and is extremely stable. It is currently overclocked to 2.25ghz and idles in the high 20's, topping out around 45 at extreme load.

 

[joelslaw]

bad sensor in the fan? (I got nothin')

 

[beatle]

What happens if you connect the fan to another header? Do you still get erroneous readings?

 

[dino8031]

It seems to be a header issue. I plug the fan into another header and it works fine, readings look correct. The PS and CPU readings seem fine, and the Chassis reading has returned to zero. Any suggestions for a fix? The board is flawless otherwise, and even overclocked to 2474.8 it still idles in the
low 30's and rarely hits 50 under extreme load.

I would still like to use the 80 mm Arctic Fan. Will the built in controller work if i cut off the 3 prong plug and hook it up to a molex? I'd like to keep the noise down.

 

[joelslaw]

most cpu fans requrie a cpu fan hooked to the cpu fan header in order to boot. However, if I misunderstood, and you meant use a 4 pin molex on the chasis fan, yeah go for it! But I don't think you can use your rpm sensor. And as a general rule, it's a bad idea to use the phrase "cut off" in regaurds to a mobo. Sound like if you want it fixed, an rma is your option.

 

[dino8031]

By "cut off" I meant cutting the 3 pin female connector off of the chassis fan and replacing it with a molex connector and plugging the tail into an open 12 volt lead. I usually stop short of hacking into a motherboard, but a $5 fan is another matter.

The prospect of an RMA for such a trivial matter seems like way too much trouble. I though there might be a quick fix or something I was missing.

 

[joelslaw]

ahhh! I see what you mean. You freaked me out with the cutting headers of the mobo stuff And yeah, you should be able to do that just fine, as there are fans sold that have 3 and 4 pin plugs on the same line (i have 2). Just as long as you connect the right wires to the right plugs, but you sound like you know what you're doing there. But as I mentioned above, you obviously can't use the fan sensor if it's pluged into a 4 pin molex. Oh well, you win some; you lose some.

As far as the mobo, I don't know a "quick fix" for a bad header, sorry

 

[dino8031]

Thanks for the vote of confidence joelslaw, but I'm a long way from knowing what I'm doing!

Anyone know if it is possible to plug the yellow sensor wire into the MB chasis fan header with the 3 pin and connect the black/red wires to a molex 12v connector?
It's a tempting experiment but I'd hate to blow anything up.

 

[joelslaw]

correct me if I'm wrong, but isn't the bad reading from that header the reason you decided no to use it in the first place? And if you'r talking about a different header, why not just plug all 3 into it and forget about the whole 4 pin molex thing?

 

[joelslaw]

oh btw, if you do it anyway and something explodes, please post about it, so the rest of us can avoid blowing-up our mobos if we ever have the same problem

 

[dino8031]

Hmmm... It seems my brain failed to engage on that particular post! It must be a Christmas thing....

I'll just plug the damn thing into a molex connector and have a martini. That should make the whole thing relatively painless and avoid the whole exploding motherboard thing.

 

[joelslaw]

great idea here's to stuff not exploding :beer: