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ASUS m5a78l-m lx3, FX-6300 CPU, GTX 970, SPC Zephyr 120mm Fan: Addressing High RPM and Vibrations

matikowy123 3915 16
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Dlaczego HWiNFO pokazuje 3700–7000 RPM na wentylatorze obudowy SPC Zephyr 120 mm, skoro producent podaje 1100 RPM, i co powoduje hałas oraz wibracje komputera?

Najpewniej HWiNFO myli odczyty i jako „Chassis” pokazuje w rzeczywistości wentylator CPU BOX, a nie wentylator obudowy. Po odpięciu wentylatora obudowy hałas praktycznie się nie zmienił, ale temperatura procesora wzrosła do 65°C w spoczynku, a „Chassis” nadal pokazywał ok. 6000 RPM, co wskazuje na błędne przypisanie czujnika [#16626053] To oznacza, że źródłem hałasu i wibracji jest najpewniej chłodzenie procesora BOX, a nie SPC Zephyr. Dodatkowo wentylator podłączony przez MOLEX pracuje stale na 100%, więc nie ma regulacji obrotów [#16626189][#16626244] Jeśli wentylator jest 3-pinowy, regulacja jest możliwa tylko przez zmianę napięcia, a nie każdy motherboard to obsługuje; 4-pin PWM działa tylko na płytach z obsługą PWM [#16626444]
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  • #1 16625983
    matikowy123
    Level 11  
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    Hey!
    I have an ASUS m5a78l-m lx3 motherboard with an FX-6300 BOX processor.
    My problem is that the computer is very loud and transmits vibrations to the floor even at rest.

    I downloaded the HWiNFO program and noticed that at rest the temperatures are ok, max 40 degrees on the CPU and 47 on the GTX 970, except that the graphics fan accelerates to more than the minimum at 60 degrees so it is definitely not the cause of the noise.
    The RPM of the CPU and GPU do not exceed 1500RPM at rest, but my eye was caught by the RPM value of the chassis fan (Chassis). At rest, a minimum of 3700RPM, almost 7000RPM under load.
    The computer vibrates really hard, you can hear it in the room below it on the ground floor.

    Is such rotation possible at all on the SPC Zephyr 120mm fan? According to the manufacturer, it has a maximum of 1100 RPM. Is it a read error or what? I have one more fan in the front, connected via MOLEX, it's a NoName, but I don't have any readings from it.

    My housing is SPC Regnum RG1, the airflow is weak in it, that's why the fan is so tired?
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  • #2 16626021
    barteksmrek
    Level 28  
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    Unplug the case fans from the power supply and check. Why is the case fan controlled from the motherboard? Both should be molex. I have five 3-air and 2 exhaust fans in the housing and neither is attached to the board.
  • #3 16626053
    matikowy123
    Level 11  
    Posts: 270
    Rate: 22
    The fan was on 3pin so I had to connect it to the board, I didn't have a molex adapter. I'm about to check how the computer works without a fan enough

    Added after 1 [hours] 51 [minutes]:

    EDIT: I unplugged the fan from the housing, I did not notice the difference in volume, still the same, but the temperature is a failure, 65 degrees on the processor at rest. I fired HWiNFO, the CPU fan disappeared and the Chassis stayed and still has 6000 RPM. I am 100% sure that I have connected everything well on the board, you cannot confuse the 4pin connector with the 3pin connector and the white CPU tip with the black valve. It turns out that the Chassis is confused with the CPU in HWiNFO and this BOX is so loud.
    Well, thanks for your help.
  • #4 16626189
    badboy84
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    barteksmrek wrote:
    Unplug the case fans from the power supply and check. Why is the case fan controlled from the motherboard? Both should be molex. I have five 3-air and 2 exhaust fans in the housing and neither is attached to the board.


    Why can't it be connected to the board? The fan connected to MOLEX works at 100% and there is no adjustment option.
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  • #5 16626194
    barteksmrek
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    I have assembled several dozen computers. None of them had case fans plugged into the board. The CPU fan and the Northbridge fan are plugged into the board, if one can be installed, because as a rule the boards are designed in such a way that the bridge cooling is connected with the CPU cooling with heat pipe and it cools the CPU fan.
    If you can, please give me an example where the housing fan is plugged into the board.
  • #6 16626204
    badboy84
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    So maybe you can tell me why motherboards sometimes have 4-5 connectors for 3 and 4 vertical fans, depending on what you need. Currently, molexes are hardly used anymore and I have not seen a fan for SATA yet :lol: Here you shouldn't brag about what you did wrong ;)
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  • #7 16626207
    barteksmrek
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    badboy84 wrote:
    I have not seen a fan on SATA yet :lol: Here you shouldn't brag about what you did wrong ;)

    I am so sorry, my colleague.
    I didn't mention the fan on the SATA.
    What friend has a desktop computer case at the moment?
  • #8 16626220
    badboy84
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    Gladius X60, it has 5 3pin fans connected to the controller. I do not use connectors on the motherboard because I prefer to have fan regulation at hand. But that's not the topic for me.
  • #9 16626229
    barteksmrek
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    Neither do I. I have three blowing fans and two exhaust fans attached to the Molexs. The entire casing is kept at a low overpressure so that no dust can penetrate. There are electrostatic filters on the blow-in filters to trap dust.
    Are your case fans powered from the motherboard?
  • #10 16626234
    badboy84
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    No, I wrote that they are connected to the controller that is in the housing.
  • #11 16626240
    barteksmrek
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    badboy84 wrote:
    So maybe you can tell me why motherboards sometimes have 4-5 connectors for case fans

    So they are not connected to the motherboard? It would be correct because I have never connected the case fans to the motherboard only to the power supply. And what kind of board has power outputs for case fans? And they are not powered from the power supply, but from the board.
  • #12 16626244
    badboy84
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    They are not because of what I wrote. Everything that is in the computer is powered from the power supply, connecting the fans to the board or the controller has the advantage that it is possible to adjust them. Connected directly to the power supply, they work non-stop at 100%. End of OT.
  • #13 16626246
    barteksmrek
    Level 28  
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    good luck mate in cooling.
    Best regards.
    Bartek

    Added after 2 [minutes]:

    badboy84 wrote:
    The fan connected to MOLEX works at 100% and there is no adjustment option.
    badboy84 wrote:
    The fan connected to MOLEX works at 100% and there is no adjustment option.

    These fans are selected with speed and efficiency so that they are supposed to run at 100%. Not with regulation. Adjusting their speed will disrupt the airflow in the housing.
  • #14 16626260
    matikowy123
    Level 11  
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    If we have all the fans of the case connected to molex, what if we buy a case with one or two fans with 3pin connectors? We are not supposed to start the computer until we get a 3pin to molex adapter? When the temperatures increase 3pin, it will not raise the revolutions because there is no OWN, and the molex will be at 100%, the temperatures will be the same, the noise too. 3pin can only be controlled by changing the voltage, i.e. the controller. It will raise the speed, depending on the temperature, only 4pin PWN, just like CPU FAN.

    So there is no difference if I have a 3pin on the board or a valve on the Molex.

    HWiNFO confuses the sensor readings. The CPU valve had 6000 RPM and the case was 1500RPM, which is as much as the maximum. I think I am going to replace the processor cooling with some better ones :)
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  • #15 16626286
    badboy84
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    And where does it say that there is no speed control on the 3-pin connector? Not all discs allow it, but that doesn't mean you can't.
  • #16 16626444
    Kasek21
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    matikowy123 wrote:
    When the temperatures increase 3pin, it will not increase the speed because it does not OWN

    Of course, it is possible only with the PWM signal, but with the V control (but not every board supports this solution).

    As for PWN: http://www.pwn.pl/ ;) (I know a typo).
  • #17 16626460
    matikowy123
    Level 11  
    Posts: 270
    Rate: 22
    Kasek21 wrote:
    (but not every motherboard supports this solution).
    Certainly not mine :)
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Topic summary

✨ The discussion revolves around a user experiencing excessive noise and vibrations from their computer, specifically with an ASUS m5a78l-m lx3 motherboard, FX-6300 CPU, GTX 970 GPU, and SPC Zephyr 120mm fan. The user noted that the chassis fan RPM readings were abnormally high, reaching 3700 RPM at rest and nearly 7000 RPM under load, which contradicted the manufacturer's specifications of a maximum of 1100 RPM for the SPC Zephyr fan. Various responses suggested troubleshooting steps, including disconnecting the case fans from the motherboard to isolate the issue. The user later confirmed that the HWiNFO software was misreporting fan speeds, leading to confusion about the actual performance of the fans. The conversation highlighted the differences between connecting fans to the motherboard versus the power supply, with some users advocating for direct connections to maintain consistent airflow and avoid noise issues.
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FAQ

TL;DR: If your Zephyr 120mm reads 6,000 RPM, that’s a misread (stat), and “HWiNFO confuses the sensor readings” (quote). Diagnose by unplugging, cross‑checking headers, and consider replacing the FX‑6300 BOX cooler. [Elektroda, matikowy123, post #16626260]

Why it matters: This FAQ helps ASUS M5A78L-M LX3 and similar-build owners fix loud rigs, false RPMs, and case vibrations.

Quick Facts

Why does a 120mm case fan show 3,700–7,000 RPM in HWiNFO?

That speed is unrealistic for a 120mm case fan. The reading likely comes from the CPU fan but is labeled as Chassis. HWiNFO can misassign headers, so a “Chassis” RPM may actually be the FX‑6300 BOX cooler. Cross‑check with BIOS labels or ASUS Fan Xpert, if available. “HWiNFO confuses the sensor readings.” [Elektroda, matikowy123, post #16626053]

Can the SPC Zephyr 120mm really spin at 3,700–7,000 RPM?

No. The Zephyr 120mm is rated about 1100 RPM, so multi‑thousand RPM readings point to a sensor/header mix‑up. Verify which header the fan uses and compare with BIOS monitoring to confirm. Replace any mislabeled entries in your monitoring tool. [Elektroda, matikowy123, post #16625983]

How do I quickly find which fan is making the noise?

Use an elimination test: briefly unplug a suspected case fan and power on to compare noise. If loudness stays the same, the culprit is likely the CPU cooler, not the chassis fan. Restore connections before stress testing. This approach isolated the FX‑6300 BOX cooler in the thread. [Elektroda, barteksmrek, post #16626021]

My idle CPU hit 65°C after unplugging a case fan—what does that imply?

If idle rises to ~65°C with no change in system noise, airflow loss increased temperature while the primary noise source remained unchanged. That points to the CPU cooler. Restore airflow and service or replace the FX‑6300 BOX cooler to reduce temps and noise. [Elektroda, matikowy123, post #16626053]

Should I connect case fans to the motherboard or Molex?

Molex runs at 100% and offers no software control. Motherboard or a front‑panel controller allows voltage/PWM regulation. If you need quiet at idle, prefer header or controller connections. “The fan connected to MOLEX works at 100% and there is no adjustment option.” [Elektroda, badboy84, post #16626189]

Does the ASUS M5A78L-M LX3 control 3‑pin case fans?

This build reported no DC control for 3‑pin chassis headers, so 3‑pin fans stayed unregulated. If your board lacks DC support, use a PWM fan, a fan controller, or a 3‑pin to Molex adapter accepting fixed speed. [Elektroda, matikowy123, post #16626460]

What’s the difference between PWM and 3‑pin DC control?

PWM uses a fourth pin with a duty signal for precise speed control. 3‑pin DC varies voltage to change RPM, but only if the board supports voltage mode. As one expert noted, DC works, “but not every board supports this solution.” [Elektroda, Kasek21, post #16626444]

Is my GTX 970 likely the noise source at idle?

Unlikely, if it idles near 47°C and its fans only ramp around 60°C. At rest, the GPU fan should be slow or off, so focus on CPU cooler or case fans for idle noise and vibration. [Elektroda, matikowy123, post #16625983]

Why does my PC vibrate through the floor at idle?

A loud or unbalanced CPU stock cooler can resonate through the chassis and floor, especially on rigid surfaces. In the thread, strong vibrations remained even at rest, pointing to the FX‑6300 BOX cooler rather than case airflow. [Elektroda, matikowy123, post #16625983]

How can I confirm HWiNFO mislabels CPU and Chassis fan headers?

Perform a quick isolate test: disconnect the chassis fan, boot, and check which RPM reading disappears. If “Chassis” remains and changes with CPU load, the CPU header is mislabeled as Chassis in software. Then adjust your monitoring tool’s labels. [Elektroda, matikowy123, post #16626053]

Give me a 3-step how-to to diagnose the loud fan.

  1. Unplug the chassis fan temporarily and boot; note noise and temps.
  2. Watch HWiNFO/BIOS to see which RPM changes; relabel if needed.
  3. If noise persists, service or replace the FX‑6300 BOX cooler and retest. [Elektroda, matikowy123, post #16626053]

What is a fan controller and why use one?

A fan controller is a front‑panel or in‑case module that powers multiple fans and lets you adjust speeds by knobs or switches. It centralizes control, handy when motherboard headers are limited or lack DC/PWM features. Example: Gladius X60’s built‑in controller. [Elektroda, badboy84, post #16626220]

Can positive pressure reduce dust in my case?

Yes. Slight intake bias helps push air out gaps, limiting dust ingress. Pair it with intake filters for best results. One builder maintained low overpressure and used electrostatic filters to trap dust effectively. [Elektroda, barteksmrek, post #16626229]

I only have 3‑pin fans but no adapters—can I still run them?

Yes. You can connect 3‑pin to motherboard headers for reading/control if supported. Without adapters, they won’t run from Molex directly. A 3‑pin‑to‑Molex adapter or a controller enables power and fixed or manual control. [Elektroda, matikowy123, post #16626260]

Edge case: Could software swap CPU and chassis readings?

Yes. The thread shows CPU RPM reported under the Chassis label, creating false 6,000 RPM case fan readings. Always cross‑verify with BIOS labels and a simple unplug test before replacing parts. [Elektroda, matikowy123, post #16626260]
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