Hey what's your "mainboard" temp?

[no-mbr]

I just purchased a system that reports a 180F temp on the mianboard.
Biostar Kh8na grand with a amd64 3200+

System vendor claims it "normal", Fan monitor says 0 rpm for the system fan, but I figure it "must" be running and maybe the sensor is goofed up.

Do you have a mainboard temp stat? Comments?

[ski]

180F (82C) is much too high for the system temp.
Even without the case fan(s) running, it should never get this high.
Normal is anywhere from 80F (27C) to 95F (35C).

Check the system temp when the computer is first turned on.
If it's much above room temp, then the sensor is faulty.

[no-mbr]

Thanks, I figured SIS sandra was a little off.

Anyway the "deal" is -- I buy a PC barebones, start to check it out and get the temp errors. Discover the Antec case fan is connected to a 3 pin header on the mainboard but reports 0 rpm. The CPU cooler fan is using the same kind of header but has a three wire connnector with 3 WIRES......

The case fan has the 3wire connector but only TWO WIRES.

I figure the case fan is not really actually "smart sense" compatible. And I don't know what good the 2 wires are doing, but maybe in old systems they report rpm but wont change it........

MY question is Are case fans with 3 wire connectors, but that use only "two wires" working correctly with smart/sense pchealth technology.

The system works perfectly, the fan is staying on all the time but reports 0 rpm..... the Cpu fan can be setup correctly in BIOS, but it needs to run all the time anyway on an AMD64 3200+.......

Post your comments, anything is worth a shot........

And thanks again for checking your own systems closely.....

[no-mbr]

The case fan is fully powered by regular power connector.

[ski]

A fan requires 3 wires and a 3 pin connector in order for its rpm to be monitored. One wire is for power, one is ground, and the last is the speed sensor wire.
A 2 wire fan has only a power and a ground wire, and it will read 0 RPM if it has a 3 pin connector, and it's connected to a 3 pin speed sensing terminal.

[no-mbr]

Well, I've got to the "bottom" of this matter. It turns outs, the 2-wire cable with the 3pin connector was actually coming of an Antec SL350 power supply. And yes, the the PSU has 2 fans, the external facing rear fan does indeed have 3 leads going to the fan motor. The SL350 in listed as a "smartpower" unit and other mainboards reviews have reported that the unit display an RPM in the BIOS, but that it did not seem to change due to temp changes. In other words, at least it was reporting the RPM even if "smartsense" or PC bios wasn't controlling it.

So I stand totally confused or sit..........

Actual new forum questions:
Is anyone getting an Antec SL350 PSU to display RPM stats in their PC BIOS?
Are they getting the stats using a mainboard with 3pin connector while using 2-wire, 3pin cable?

If anyone is getting successful "smartsense" readings, what color wires are going to which pins? The CPU cooler is using blk,red,yellow, with yellow going to the smartsense pin.

Thanks.

[ski]

What color are the wires for the PS's 2wire/3pin cable?

[no-mbr]

The wires from the power supply are blk and blu...and by the way they DO go to the ground pin and the "rate sense" pin.....the 12v pin is left un connected.

However, you can see the blk/red/yel wires going to the fan motor on the back of the PSU. The case fan is in fact a "dumb" 2wire fan.

So it turns out that the Antec 350sl PSU smart fan will go ahead and work off it's own sensor [and power] but is not compatible with the Biostar PCHealth BIOS [at least in this case]...

I used a hair dryer to verify that the BIOS readings were working and correctly changing the CPU fan [2000-4300rpm rnage]

And right about then, is when I re-read the BIOS manual and saw a screenshot of a system with another "fan control" setting for the "system fan".

My BIOS setup displays only a single control for the CPU fan, at the bottom gives a single line to display system fan RPM.

If the ANTEC smartfan cable or fan was actually compatible, another "smart control" would be present in the BIOS......... :mad:

Again, my question is: Is this a quirk? Is anyone else getting a PChealth BIOS display for a system fan [or cpu] using only two wires. I figure, it's possible to report the RPM, but not initate "smartfan" control. But I don't even get RPM.

[ski]

According to the Antec site, your PS should adjust its fan speed setting according to the system temp whether or not it's being monitored.

Try this:
Set the PCHealth system fan setting to 'Always on', and d/l the MB monitoring utility here:
http://www.pcworld.com/downloads/file_description/0,fid,7309,00.asp

If the system fan reading for the PS fan still reads 0 RPM, then something is wrong either with the fan's speed sensor connector, wiring, or the PS's internal speed sensing circuitry.
Suggest that you contact the supplier about the problem.

[no-mbr]

Nice program, supports 1155 mboards, but not the biostar grand.

I did plug in another 3wire fan that does display the RPM in the BIOS.

But what I was looking for was a fan that it is compatible with what ever "pc health BIOS " the K*NHA uses. THe Biostar website had a HW monitor, but it's for overclocking and cpu voltage etc.

I know the "speeze" brand cpu cooler is compatible because I've watched it change RPM and display temp in the BIOS as I ran a hair dryer.

All I want to confirm is where the other mainboard temp sensor is at, and to watch it and the other mainboard/case fan react to mainboard temp.

I don't know for a fact that "sandra" is displaying the temp from a different sensor [other than CPU]or not. I do know that sandra understood that there were two mainboard RPM/SENSE headers and knew that the cpu fan was running and that the system or case fan was not.....so I assume there aree infact two temp sensor inputs, one near the CPU and one on the mainboard near the nvidia chipset.....

Like I said previously, the BIOS sceeen shot displays "two smartfan" controls. MY BIOS only displays one. I did a BIOS clear once also, everything came back auotdetected fine. (except time and boot order...)

Thanks, I wish there was another program like the one you linked.