Getting a Power Fan Warning on New Rig

[AlCaponeJr]

So.. finally got most of my components, hooked them all up - so far so good.. except 1 anomaly..

I have an Enermax 535W FMA and ASUS A8N-SLI Premium. I plugged the little 3-pin connector from the PSU into the PWR_FAN connector on the board near the PCI-x16 slot.

When I run ASUS PC Probe, I get a warning "Power Fan below threshold" and it shows the power fan running at 0 rpm. I know the fans in the PSU are running (both intake and exhaust).

What gives? Any ideas?

 

[Safeway]

So there is a 3-pin connector from the PSU to connect to your mobo to monitor RPMs? Is this plug in shaped so that it can only plug in one way? I'm guessing that it might be wired incorrectly. Compare the 3-pin to another fan. Check the location of the yellow cables, and make sure they are the same.

Is the fan powered from the header?

 

[Zepper]

You need to set the alarm for that fan to match its specs. In fact, you should set all the warnings to be in line with what you actually have connected. Fans are running a lot slower than they used to for noise reasons, so you need to set the low speed warning to a much lower speed than the default. With temps, the warnings may be set too high. For example, I set my CPU warning in the 60 deg C range even though up to the 80s is safe according to AMD. Since my temps normally run in the 30s to low 40s, then if it makes it into the 60s, something is probably wrong.
. So to repeat, just reset all your health monitor (Asus Probe, Abit EQ, etc.) software's warning levels to jibe with your actual conditions. Something that is often overlooked in setting up a new system. There may also be settings in the BIOS for warnings that need to be adjusted to your reality.

.bh.

 

[Safeway]

Good idea Zepper. When you do WCing, you have to disable the CPU fan alarm - for obvious reasons.

 

[AlCaponeJr]

Actually, since it is a PSU Fan, I assume it is powered internally within the PSU. The 3-pin connector is keyed so it can only plug in one way (I'll double check the wiring). That connector should be for fan monitoring only I think. Still stumped.

Originally posted by: Safeway
So there is a 3-pin connector from the PSU to connect to your mobo to monitor RPMs? Is this plug in shaped so that it can only plug in one way? I'm guessing that it might be wired incorrectly. Compare the 3-pin to another fan. Check the location of the yellow cables, and make sure they are the same.

Is the fan powered from the header?

 

[AlCaponeJr]

I hear you - I will go and lower some of hte other thresholds because of the slower rpm fans. However, in this case, the rpm monitor for the PSU fan is showing zero rpm, so it is not a high threshold issue. Does anyone use that PWR_FAN connector on the A8N-SLI Premium board with any results?

Originally posted by: Zepper
You need to set the alarm for that fan to match its specs. In fact, you should set all the warnings to be in line with what you actually have connected. Fans are running a lot slower than they used to for noise reasons, so you need to set the low speed warning to a much lower speed than the default. With temps, the warnings may be set too high. For example, I set my CPU warning in the 60 deg C range even though up to the 80s is safe according to AMD. Since my temps normally run in the 30s to low 40s, then if it makes it into the 60s, something is probably wrong.
. So to repeat, just reset all your health monitor (Asus Probe, Abit EQ, etc.) software's warning levels to jibe with your actual conditions. Something that is often overlooked in setting up a new system. There may also be settings in the BIOS for warnings that need to be adjusted to your reality.

.bh.

 

[Zepper]

Some fans run so low that the speed sensor in the mobo regards them as zero. Sometimes a BIOS update can fix that. At least it did for one of my MSI mobos. If you have another 3-pin fan with working sensor wire around there, try hooking that to your Power Fan connector and see what kind of reading you get. There is always an off chance that that particular fan header might be bad.
. Also another issue may be in play... Some Antec PSUs have fans that work funny if you plug their sensor wire into some mobos. Both Antec and Enermax PSUs are mostly made by the same OEM (Channel Well). C'est possible, no?

.bh.

 

[JEDIYoda]

Actually those headers are designed to run fans with the 3 pronged connectors!!

Should be 2 of them if my memory serves me correctly!