Min Chassis Fan Speed on Z87-G55

Hello everyone,
I have recently built a new system based on an MSI Z87-G55. I chose this motherboard in part for its BIOS-based fan control capabilities (my goal is to get a low-noise system, in an OS-independent way).
In the BIOS hardware monitor section, the minimum fan speed for system fans is limited to 50%. This is disappointing for me because I thought that the system fan headers would go as low as 37.5%.
Is there any chance that a BIOS update would remove the 50% min fan speed limit for system fans?
Grégoire

Thanks for your answer. Indeed, a fan controller (rheobus) would allow a wider control range. It's what I had in my previous 8-years old rig (control from 5V to 12V). But, nowadays, motherboards are quite capable regarding fan control. They can automatically adjust the speed of all fans (independently) depending on the CPU temperature, which is very appealing to me.
I guess I'll have to accept the 50% hard limit. I don't understand where it comes from, though.

Similar Messages

Stuck at gray progress indicator screen for 1 min - then fan speed races...

Hello,
I have read through a bunch of posts here and figured I would give my scenario. I have a 1st gen iMac G5 - My fiancee used it in college and then I boxed it up and it sat in the box for about a year or so untouched. We just moved into a new apartment so I figured I would hook it up. I plugged it in and it started up a bit slow - but I was able to log in ok the first time - then I did a software update (i figured it could use an update after sitting for a year)
Then I restarted and it would not make it to the login screen.
I power up, it goes to the grey apple logo splash screen for about 1 minute, then the fan starts racing on high and there it sits... forever racing and progress indicator spinning. I have tried the SMU reset (via unplugging the power cable and reconnecting and holding power button)
PRAM reset by holding command+option P+R.
Is it possible my PRAM battery is shot from sitting in the box for a year?
It is also a probable software issue from updating??
I tried booting in safe mode but did not work, actually I belive the computer just turned off after 1 minute when I did try to boot into safe mode.
Where can I go from here, given the information?
Thanks much.

Welcome to Discussions - it is likely that your PRAM battery (CR2032 3v lithium) will need replacement and it would also be a good idea to boot from your install disc and run Disk Utility:
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.
You could also run the Apple Hardware test from your install disc.
Make sure that the air vents of the computer re not clogged, you can vacuum them.
Please post back and let us know how you made out,

Mac mini slow and high fan speeds

Hello! I have a 2011 mid range mac mini and love the machine, however I have noticed a few things. First off, it seems to be a bit on the slow side when multitasking. I have the standard 4 gigs of ram installed, but running programs like MS Word and Safari at the same time, the machine seems to struggle a bit. Also I have noticed when doing a lot of file transfers via USB, the fan will kick up to high gear for a few minutes and then drop down. Is there something wrong or is this normal? I'm doing a time machine backup of 120Gigs, have safari open and activity monitor open.
Activity monitor states 1.16Gigs free, 792MB wired, 961.4MB active, 1.12GB inactive, 2.84GB used. VM size is 150GB, page ins are 962, outs are 380kb, swap used is 10.5MB. Right now the fan seems to have slowed to a mid range mode of some sort and is not in high gear. Thanks!

How many apps you instaled? how many pictures videos and time you get usigm it? let them a litlle sleep, and your mac nmini will ne wel.
As far as the fan is concerned, it will rev up and down
based primarily on CPU load. If something is using
up a lot of processor, it gets hot and therefor the fan
speeds up to cool it down, or atleast maintain a safe temp.
When the fan revs up, open Activity Monitor and see how
much processor resources are being used and look at
the list to see if any one process is using up CPU. This
can also give an idea of what may be slowing things down
as well.
And yes, when doing a lot of file transfers, things may
possibly rev up a bit if it is continuous for a period of time.

Mac Mini fan speed shoots up with GPU use

Hello.
I have a 1.83 C2D mini that's recently been giving me problems. I opened it up to install a new airport card (having separate issues with that!) and at some point my fan started acting up. The mini was always dead quiet. Now, anytime I do something GPU intensive the fan shoots up to 4500-5500 RPM (tested with smcfancontrol).
Here are some examples...
Browsing the internet in safari is normal, 1500-2000 fan speed.
Streaming a movie over my local network from a server through quicktime, ~3100 RPM
Begin watching a video on youtube or running a program like plex or xbmc, the fan goes nuts between 4k-5500 rpm.
If I exit and go back to internet browsing it will slowly come down.
Before anyone asks, I'm on a fresh install of snow leopard right now with same issues, I tried the SMC reset a few times, and I definitely connected the fan wire when I put the mini back together.
Can anyone help me out with suggestions as to what I did or how to fix this? This mini is basically unusable now for my htpc!
Thanks!

Hi, I have a similar problem. My Mini is from 2005. I will be working online and all of a sudden the fan speed goes waaay up (I make sure to keep the air intake slots cleaned weekly), my connection ends, the screen goes dark (black) and after bringing the screen back into view a few times (clicking the mouse), the computer will shut down. OR maybe it is the Mac running at hyper speed and not the fan.
As I am basically computer illiterate, I have no idea what causes it. I have slower than molasses dial-up and can't even get my AOL to work right anymore.
I had that "Finder" blinking problem after upgrading to this last OSX version, finally got that fixed.
After that fix about a year ago) , my computer ran better. I noticed (for the first time since I got this Mini) that I had an "alias" HD in my home/users folder. Not sure how it got there OR how I recently lost it, but seems I can't figure out how to get it back. Not sure if that is the problem.
Sorry if you don't understand my post, but it's part of my computer stupidity coming out. lol Sure this sure be "parted-out" into several categories
ok... help please?
Thanks in advance..... Murphy

Mac min Late 2012 fan speed

Fan speed in my mac mini is always 1800 rpm, when is CPU temperature 40 and when is temperature 85. Is this normal?

By default it probable won't kick up the fan until closer to 90 C (194 F) and then the fan will shoot up to the maximum speed.
If you want more control, try Lobotomo Software: MoofMenu or iMac HDD Fan Control
With FanControl when my Mac Mini is cool the fan runs a the default speed,
then as it warms up to above 138 F, the fan gradually speeds up and increase's the cooling.

Increase fan speed on Intel Core Duo Mac mini?

I have owned a PowerPC G4 based Mac mini for some time now. It's been (and continues to be) a great little computer.
Just recently I bought the Intel Core Duo version. It too seems like a great little computer.
However, I've got to admit that the amount of heat the Intel version puts out is staggering. The internal hard disk claims to be running around 119-126 degrees Fahrenheit. I put a thermometer near the vent on the back and it topped out at 120 degrees F. The bottom pad is nearly too hot to touch. This computer is running a distributed computing project.
Far be it from me to second guess Apple's engineers, but the fan is never turning very fast at all on the Intel mini. It is running, though, and appears to be doing as it was designed to do. (I've seen my PowerPC machine get to rip-roaring during the summer.)
Running the Apple Hardware Test shows that the Intel mini's fan can speed up quite a bit. I'd like to know if there's a way to request a higher fan speed outside of the Hardware Test. I know I could pop the thing open and just "forget" to reconnect the fan speed sensor wire to command the fan to run at full speed, but I don't want to invalidate the warranty.
Maybe I'm being silly, but I prefer that my computers be moving enough air from them to keep things cool regardless of noise level.

The smcFanControl utility is what ended up solving this problem. Turning up the fan speeds just a little bit resulted in a very noticeable cool-down.

Mac MIni lastest 2009 temps en fan speed

Hello. What are the oficial temps of CPU en fan speed of thid model?. I don´t know if my Mac is working fine.

Did the fan (there is only one) always run full blast, even before your opened the Mini and did the upgrades? Or did it take some time running before the fan would speed up?
There are three general causes for the fan running fast:
1) Insufficient access to room temperature air -- usually due to the Mini being enclosed in furniture, sitting on other heat-producing equipment, or clogged air vents in the Mini. This will usually cause the fan to run fast after the Mini has run for a few minutes, but not immediately on startup.
2) Fan control wire not re-attached after work inside the Mini. This will cause fan to run full speed all the time.
3) PMU reset procedure wrongly applied to an Intel Mini. Only PPC Minis get he PMU procedure. Intel Mini's should have the SMC reset instead. Applying the SMC reset can usually undo the damage. When the PMU procedure has been applied to an Intel Mini, the fan will run full speed all the time.
The SMC reset is described here:
http://support.apple.com/kb/HT1543

Can't reach max (also with fancontrol) and min fan speed manually

I'm using fancontrol to control my fan's speed. One thing I noticed is that maximum fan speed is never reached even when temperatures exceed max limit.
If I set max temperature in /etc/fancontrol to 55 and restart fancontrol, 55+°C will cause fan to speed only at ~5800 RPM. If I set min temperature to 60, fans will completely stop. 'pwm_enable' is set to 1 when fancontrol is running.
Now if I stop fancontrol, fan will speed up to ~6460 RPM while 'pwm' is at 255 and 'pwm_enable' changed to 0. I can't change 'pwm' value at this point. If 'pwm' gets set to 0, fan will completely stop.
At this point fancontrol is still not running. If I set 'pwm_enable' to 1 and leave 'pwm' at 255, fan will slow down to ~5800 RPM. If I set 'pwm' to 0, fan will not slow down completely, but will instead slow down to ~2080 RPM.
What's interesting is that although fancontrol can't reach max fan speed, it can stop fan completely, while I can do neither manually.
Any idea how to enable at least max fan speed for fancontrol?

I'm using fancontrol to control my fan's speed. One thing I noticed is that maximum fan speed is never reached even when temperatures exceed max limit.
If I set max temperature in /etc/fancontrol to 55 and restart fancontrol, 55+°C will cause fan to speed only at ~5800 RPM. If I set min temperature to 60, fans will completely stop. 'pwm_enable' is set to 1 when fancontrol is running.
Now if I stop fancontrol, fan will speed up to ~6460 RPM while 'pwm' is at 255 and 'pwm_enable' changed to 0. I can't change 'pwm' value at this point. If 'pwm' gets set to 0, fan will completely stop.
At this point fancontrol is still not running. If I set 'pwm_enable' to 1 and leave 'pwm' at 255, fan will slow down to ~5800 RPM. If I set 'pwm' to 0, fan will not slow down completely, but will instead slow down to ~2080 RPM.
What's interesting is that although fancontrol can't reach max fan speed, it can stop fan completely, while I can do neither manually.
Any idea how to enable at least max fan speed for fancontrol?

MSI Z87-G43 can't control fan speed

Hi, i just bought an MSI Z87-G43 and i'm using a i5-4670 on it (yeah, 4670 without the K).
I wanted the minimum noise as possible so i bought a Noctua NH-U12P SE2
Like the pictures shows it has 2 fans.
I connected the 2 fans on cpu1 and cpu2 fan and both BIOS and Commander Center can see them correctly, but both of them can't change the rotation speed.
Those fans have a 3 pins connector.
How can i do it? Now my CPU is cool and i like it, but a little more hot for a little less noise is a good deal (and my goal!)
thank you

As alternative you can get a fan controller like Sunbeamtech Rheosmart PCI Fan Controller, it should allow to use 4pin PWM singnal and convert it into voltage control,
Quote
Product Details:
Smart Way Controlling all Fans & Airflow. The Rheosmart PCI Fan Controller is designed to make any existing 3-pin fan automatically regularized by the PWM signal from the Motherboard! With its ability to connect two fans to a single PWM connector at a maximum of 20W/channel, a wide selection of fans can be supported. When a normal fan is connected to the Rheosmart PCI Fan Controller, they become auto adjusting through the PWM signal.
The Rheosmart PCI Fan Controller operates in two different modes; when connected to a PWM-enabled motherboard you can allow the system to auto-adjust fan speed through he motherboard's temperature sensor. When switched onto manual mode by the pushing of the lever-switch to the right, you turn the connected fan onto manual control mode.

Z87-GD65 CPU Fan speed control not working

As per the title, the fan speeds set from either the BIOS (E7845IMS.1B0) itself or from within Command Center don't make any difference to the sped of the fans on the CPU cooler.
The cooler is a Noctua NH-D14 with stock fans (non PWM)
Can anyone help?
I'm not sure if I've missed a BIOS option anywhere!

Quote from: PCArcade on 25-September-14, 16:12:39
he cooler is a Noctua NH-D14 with stock fans (non PWM)
However, I removed the fans from the CPU headers and put them on system fan header, now the fan controls work - looks like the mobo is faulty :(
Not gonna RMA it though, it's pretty trivial
It's not faulty at all.
The CPU fan header is PWM only!
The obsolete Voltage Control method is not recommended for CPUs.
It's a recipe for failures.
All the modern motherboards require PWM control for the CPU fan.
So you should replace the CPU fan with a PWM one.

C200 M1 PSU Fan speed varies

I have a C200 M1 running 1.4(3p), I am noticing some performance issues with this server, it just seems slow. I went to it physically and you can hear the PSU fans spin up and slow down every few seconds. Within an SSH to the CIMC I am seeing both fans vary from 2K to 7K RPMs every 3-5 seconds. Here are the PSU details:
ucs-c2xx-m1 /chassis # show psu detail
Name PSU1:
    In. Power (Watts): 87
    Out. Power (Watts): 650
    Firmware : R0E
    Status : Present
    Product ID : SUNNY651AM
Name PSU2:
    In. Power (Watts): 98
    Out. Power (Watts): 650
    Firmware : R0E
    Status : Present
    Product ID : SUNNY651AM
Here you can see the speed differences:
ucs-c2xx-m1 /sensor # show fan
Name                 Sensor Status        Reading    Units      Min. Warning    Max. Warning    Min. Failure    Max. Failure
PSU1_FAN_1           Normal               3072       RPM        N/A             N/A             N/A             N/A
PSU2_FAN_1           Normal               2048       RPM        N/A             N/A             N/A             N/A
W793_FAN1_TACH1      Normal               5700       RPM        N/A             N/A             800             N/A
W793_FAN1_TACH2      Normal               5500       RPM        N/A             N/A             800             N/A
W793_FAN2_TACH1      Normal               5800       RPM        N/A             N/A             800             N/A
W793_FAN2_TACH2      Normal               5500       RPM        N/A             N/A             800             N/A
W793_FAN3_TACH1      Normal               6000       RPM        N/A             N/A             800             N/A
W793_FAN3_TACH2      Normal               5600       RPM        N/A             N/A             800             N/A
W793_FAN4_TACH1      Normal               5800       RPM        N/A             N/A             800             N/A
W793_FAN4_TACH2      Normal               5500       RPM        N/A             N/A             800             N/A
W793_FAN5_TACH1      Normal               5900       RPM        N/A             N/A             800             N/A
W793_FAN5_TACH2      Normal               5300       RPM        N/A             N/A             800             N/A
ucs-c2xx-m1 /sensor # show fan
Name                 Sensor Status        Reading    Units      Min. Warning    Max. Warning    Min. Failure    Max. Failure
PSU1_FAN_1           Normal               6784       RPM        N/A             N/A             N/A             N/A
PSU2_FAN_1           Normal               7360       RPM        N/A             N/A             N/A             N/A
W793_FAN1_TACH1      Normal               5700       RPM        N/A             N/A             800             N/A
W793_FAN1_TACH2      Normal               5500       RPM        N/A             N/A             800             N/A
W793_FAN2_TACH1      Normal               5800       RPM        N/A             N/A             800             N/A
W793_FAN2_TACH2      Normal               5500       RPM        N/A             N/A             800             N/A
W793_FAN3_TACH1      Normal               5900       RPM        N/A             N/A             800             N/A
W793_FAN3_TACH2      Normal               5600       RPM        N/A             N/A             800             N/A
W793_FAN4_TACH1      Normal               5800       RPM        N/A             N/A             800             N/A
W793_FAN4_TACH2      Normal               5600       RPM        N/A             N/A             800             N/A
W793_FAN5_TACH1      Normal               5900       RPM        N/A             N/A             800             N/A
W793_FAN5_TACH2      Normal               5300       RPM        N/A             N/A             800             N/A
This server was running firmware 1.0(2) when I first found this issue, I have since upgraded it to the lastest code. I have done a full shutdown and removed the PSUs and let it sit for a few minutes.
When the fan speeds are low, the CPU performance is very low, VMs running on it are slow. Any thoughts??
Thanks.

Running ESXi 4.1 348481
Memory is running in Performance Mode
I have run the latest HUU with option 8 to upgrade all
Here are the outputs requested, this server has been running for a while with a single power supply connected, hence the multiple errors reflecting that.
ucs-c2xx-m1# scope fault
ucs-c2xx-m1 /fault # show discrete-alarm
ucs-c2xx-m1 /fault # top
ucs-c2xx-m1# scope sensor
ucs-c2xx-m1 /sensor # show temperature
Name                      Sensor Status Reading    Units      Min. Warning Max. Warning Min. Failure Max. Failure
IOH_TEMP_SENS             Normal         45.0       C          N/A          80.0         N/A          85.0
P2_TEMP_SENS              Normal         55.0       C          N/A          87.0         N/A          92.0
P1_TEMP_SENS              Normal         49.5       C          N/A          87.0         N/A          92.0
DDR3_P2_D1_TMP            Normal         29.0       C          N/A          68.0         N/A          70.0
DDR3_P2_E1_TMP            Normal         30.0       C          N/A          68.0         N/A          70.0
DDR3_P2_F1_TMP            Normal         29.0       C          N/A          68.0         N/A          70.0
DDR3_P1_A1_TMP            Normal         35.0       C          N/A          68.0         N/A          70.0
DDR3_P1_B1_TMP            Normal         34.0       C          N/A          68.0         N/A          70.0
DDR3_P1_C1_TMP            Normal         32.0       C          N/A          68.0         N/A          70.0
PSU1_TEMP_1               Normal         40.0       C          N/A          60.0         N/A          65.0
PSU2_TEMP_1               Normal         40.0       C          N/A          60.0         N/A          65.0
FP_AMBIENT_TEMP           Normal         24.0       C          N/A          40.0         N/A          45.0
ucs-c2xx-m1 /sensor # top
ucs-c2xx-m1# scope sel
ucs-c2xx-m1 /sel # show entries | grep Critical
2012-12-17 22:09:14 Critical      "FRU_RAM SEL_FULLNESS: System Event sensor for FRU_RAM, failure event, Upper Critical going high                          (85 > 80 ) was asserted"
2012-12-17 22:05:25 Critical      "FRU_RAM SEL_FULLNESS: System Event sensor for FRU_RAM, failure event, Upper Critical going high                          (84 > 80 ) was asserted"
[System Boot]       Critical      "FRU_RAM SEL_FULLNESS: System Event sensor for FRU_RAM, failure event, Upper Critical going high                          (83 > 80 ) was asserted"
[System Boot]       Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
[System Boot]       Critical      "FRU_RAM SEL_FULLNESS: System Event sensor for FRU_RAM, failure event, Upper Critical going high                          (80 > 80 ) was asserted"
2012-12-17 20:16:31 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-12-17 19:34:47 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-12-17 19:34:47 Critical      "PSU1 PSU1_STATUS: Power Supply sensor for PSU1, Power Supply input lost (AC/DC) was asserted"
2012-12-17 19:34:05 Critical      "FRU_RAM SEL_FULLNESS: System Event sensor for FRU_RAM, failure event, Upper Critical going high                          (80 > 80 ) was asserted"
2012-12-17 19:33:28 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-12-17 19:33:28 Critical      "PSU2 PSU2_STATUS: Power Supply sensor for PSU2, Power Supply input lost (AC/DC) was asserted"
2012-12-05 20:22:41 Critical      "PSU2 PSU2_STATUS: Power Supply sensor for PSU2, Power Supply input lost (AC/DC) was asserted"
[System Boot]       Critical      "PSU1 PSU1_STATUS: Power Supply sensor for PSU1, Power Supply input lost (AC/DC) was asserted"
[System Boot]       Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-11-05 21:43:11 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-11-05 21:43:11 Critical      "PSU2 PSU2_STATUS: Power Supply sensor for PSU2, Power Supply input lost (AC/DC) was asserted"
2012-06-11 14:51:35 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-05-03 10:59:49 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-05-02 16:16:45 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2012-05-02 16:16:44 Critical      "PSU1 PSU1_STATUS: Power Supply sensor for PSU1, Power Supply input lost (AC/DC) was asserted"
2012-02-02 14:03:57 Critical      "PSU1 PSU1_STATUS: Power Supply sensor for PSU1, Power Supply input lost (AC/DC) was asserted"
2012-02-02 14:03:52 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
[System Boot]       Critical      "PSU1 PSU1_STATUS: Power Supply sensor for PSU1, Power Supply input lost (AC/DC) was asserted"
[System Boot]       Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2011-12-21 13:55:17 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2011-12-21 13:55:16 Critical      "PSU1 PSU1_STATUS: Power Supply sensor for PSU1, Power Supply input lost (AC/DC) was asserted"
[System Boot]       Critical      "PSU2 PSU2_STATUS: Power Supply sensor for PSU2, Power Supply input lost (AC/DC) was asserted"
[System Boot]       Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2011-09-30 10:02:39 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2011-09-30 10:02:39 Critical      "PSU2 PSU2_STATUS: Power Supply sensor for PSU2, Power Supply input lost (AC/DC) was asserted"
2011-09-25 13:31:33 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2011-09-25 13:31:33 Critical      "PSU2 PSU2_STATUS: Power Supply sensor for PSU2, Power Supply input lost (AC/DC) was asserted"
2011-09-24 13:11:31 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
2011-09-24 13:11:31 Critical      "PSU2 PSU2_STATUS: Power Supply sensor for PSU2, Power Supply input lost (AC/DC) was asserted"
2011-09-20 14:28:02 Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"
[System Boot]       Critical      "PSU_REDUNDANCY: PS Redundancy sensor, Redundancy Lost was asserted"

Turbo2/PC Alert III/ Adjustable Low Fan Speeds?

Anybody getting low RPM adjustable fans to register in PC Alert III?
I have adjusted the fan speed alerts on CPU and chassis to min, and still can't get proper fan RPM reading. Am guessing fans are about 1/2 speed (given the amount of adjustment I made), or about 1500 RPM. Now getting red 5 digit fan speeds and case temp jumping around.
Am not asking so I can stare at fan speeds, just to see changes in any adjustments I might choose.
Still loving the low dba of my 2 Enermax fans!

Just got a new case and some gadgets...My Thunderbird 1400 now idles at 42 degrees celsius. Overclocked to 1600 it idles at 42-43, under full load @1600 it doesnt go over 43.
In my old case i had 8 case fans, which made a whole lotta noise, so with this one i wanted it quiet. I put four 80mm case fans in (two front, two rear) and a 5 1/4 drive bay temp monitor/fan controller to run them. When its idling, the fans dont run, just the 5000rpm cpu fan, video card fan and thermostatically controlled psu fans. So its almost silent. When its under load, and the temp hits 43 degrees c. the fans kick in until the temp drops back and they switch off.
Gives the best of both worlds really, when im browsing or downloading or doing basically anything that wouldnt put enough load on the cpu that it needs extra cooling its quiet enough to be unnoticable, but when im gaming the fans kick in to keep the system cool. Since i usually either play games with the speakers cranked up (during the day) or use headphones (at night) i rarely even hear the exta fans spinning...
I picked up a motor speed controller kit yesterday, which i havent built yet, but will use that to control a 120mm blowhole and two 80mm side fans, so i can have them running all the time at around 1000rpm (quieter than the psu) to just give a slight breeze through the case, meaning the front and rear fans should only kick in after a lengthy period of gaming or benchmarking.

Connection between power supply, Motherboard & Chassis Fans

Hi guys,
Please help me out here to connect my chassis fans to the motherboard/ powersupply.
My rig is stated below
===
Msi x99s Gaming 7 mobo
Cooler master storm stryker Cabinet
Corsair cx750
===
I just want to connect my chassis fans(White LED)
- 1 200 mm top fan
- 1 120 mm rear fan
- 2 120 mm side fans
==
I want to control the fan speed using the front controls on my chassis too. Please help me out here.
Any help is very much appreciated.
Regards
Nidhin

Hi Team,
Thanks guys for the valuable input. I think I did the connection as you guys mentioned and now the fans are spinning, but the LED's are not lighting up. Sorry for being a noob out here. I have attached the screenshots of the connections. Also, I fixed an old gfx card to test if the rig is working and I am not getting the display. Kindly help me out.
PFA
Rgds
Nidhin

Questions about macbook pro's fan speed

i'm using a macbook pro early 2008
and i use istatpro to monitor cpu gpu temp
1. do the fans work with a min rpm around 2000 all the time?
2. when i open quite a few apps, mbp get hot, and the gpu temp rises up to 80c degree also cpu temp rises to 60or70c degree. but the fan rpm is still around 2800.
some guys using macbook/pro confirm that with temp around 80c, their fan has a rpm around 3000or4000.
does someone else here have this situation above.
is it normal?
thanks a lot

Welcome!
1) Yes, the default fan speed is 2000 rpm. At that speed they are nearly silent. The speed will increase with temperature. Max revs possible are 6000 rpm.
2) Notebook computers get hot, regardless of make. The temps you see are reasonable for graphic-intensive applications. The MBP will automatically shut down if the temps get too high; I believe the cutoff point is just over 100°C.
There are third-party programs that allow you to customize fan settings but they must be used with care. It's possible to overwork the fans by manually setting their speeds too high.
The best approach is to insure that the MBP gets to use all its built-in cooling capacity. Using the computer on a pillow or blanket is bad; the case bottom dissipates heat but only if air can get under it. Use a lapboard if you must use the computer in your lap.
Exhaust air emits from the hinge area in the back of the case. make sure nothing blocks the case there or you'll get overheating.

[Solved] lm-sensors fan speeds and voltage.

After installing lm-sensors and running sensors-detect I have the following readings from sensors;
~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +42.0°C (crit = +80.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +47.0°C (high = +78.0°C, crit = +100.0°C)
coretemp-isa-0001
Adapter: ISA adapter
Core 1: +42.0°C (high = +78.0°C, crit = +100.0°C)
I am sure in the recent past I was able to retrieve fan speed and voltage readings from this machine;
|Abit FP-IN9 SLI | Intel(R) Core(TM)2 Duo CPU [email protected] | GeForce 9800 GT |
I suspect this is something that I am doing wrong (or is it a kernel issue??) as I have the same problem on a similar machine running Ubuntu 10.04.
Any ideas appreciated.
Last edited by ancleessen4 (2010-03-09 08:31:15)

Hi graysky,
You were spot on!
I followed the instructions in the wiki article to add
acpi_enforce_resources=lax
to /boot/grub/menu.lst
Reboot...
Voila!
[neil@archbox ~]$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +30.0°C (crit = +80.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +36.0°C (high = +78.0°C, crit = +100.0°C)
coretemp-isa-0001
Adapter: ISA adapter
Core 1: +34.0°C (high = +78.0°C, crit = +100.0°C)
w83627dhg-isa-0290
Adapter: ISA adapter
Vcore: +1.12 V (min = +0.00 V, max = +1.74 V)
in1: +0.91 V (min = +0.51 V, max = +0.21 V) ALARM
AVCC: +3.30 V (min = +2.98 V, max = +3.63 V)
VCC: +3.30 V (min = +2.98 V, max = +3.63 V)
in4: +1.10 V (min = +0.00 V, max = +0.14 V) ALARM
in5: +1.20 V (min = +0.13 V, max = +0.00 V) ALARM
in6: +1.58 V (min = +0.02 V, max = +0.00 V) ALARM
3VSB: +3.23 V (min = +2.98 V, max = +3.63 V)
Vbat: +3.01 V (min = +2.70 V, max = +3.30 V)
fan1: 0 RPM (min = 340 RPM, div = 128) ALARM
fan2: 811 RPM (min = 332 RPM, div = 16)
fan3: 0 RPM (min = 340 RPM, div = 128) ALARM
fan4: 0 RPM (min = 340 RPM, div = 128) ALARM
fan5: 0 RPM (min = 527 RPM, div = 128) ALARM
temp1: +28.0°C (high = +72.0°C, hyst = +0.0°C) sensor = thermistor
temp2: +29.0°C (high = +70.0°C, hyst = +65.0°C) sensor = diode
temp3: +38.5°C (high = +70.0°C, hyst = +65.0°C) sensor = thermistor
cpu0_vid: +0.000 V
[neil@archbox ~]$
:D

Min Chassis Fan Speed on Z87-G55

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