RAM riser sensor location? Loud fans.

2006 Mac Pro Quad Xeon
2GB stock RAM + 3 GB Kingston RAM
A while back the fans became very VERY loud.
CPU fan 2749rpm
Pcie 499rpm
Rear 2840rpm
Power Supply 599rpm
Error code:
4SNS/1/0000000: TN0H
Took it into the mac store today, and they ran a diagnostic. They guy told me that it said I had a missing or possibly broken sensor on my RAM riser. I imagine this would be a temp sensor?
Where do I locate this sensor?
The only things I have done to the comp are added RAM, installed a new video card, and added HDs. None of which coincided with the fan issue.
Any ideas? Thanks so much!

Bad RAM is one issue.
Two places carry Mac Pro 1,1 Riser for $35-70.
Risers:
http://www.dvwarehouse.com/Apple-Memory-Riser-card-for-Mac-Pro-First-Generation- 922-7695-----NEW-p-37247.html
http://www.powerbookmedic.com/Mac-Pro-Memory-Riser-p-17711.html
FBDIMMs need to be kept under 70*C too. Use Hardware Monitor to check, SmcFanControl 2.3+ to boost the fans by a small 300rpm above default.
I just bought a set of 4x2GB $110 (8GB total, $54 each set) FBDIMM DDR2 667MHz
http://www.amazon.com/BUFFERED-PC2-5300-FB-DIMM-APPLE-Memory/dp/B002ORUUAC/

Similar Messages

Added Ram to Mac Mini & Now There is Loud Fan Noise

Hi everyone,
Today I bought a Mac Mini Core Solo. I brought it home and opened it to add an additional 1gig of ram. I now have 1 stick with 1GIG and 1 stick with 256mb of ram inside of it. After adding the additional ram I closed the case and turned the power on. It picked up the new ram but it is now making a really loud fan noise. I'm nervous that something has gone awry. Any suggestions for as to what is wrong? Did i do a big bad?
I'd appreciate any advice!

Sounds like a connector to the fan was pulled loose when you dismantaled the mini to get at the memory slots.
See the pictures here...
http://www.applefritter.com/MacMini_Take_ApartGuide
Open her up and check that the wires from the fan a re seated onto the motherboard correctly.

UCS 6248 Fabric Interconnect loud fan RPM noise

Hello,
Our currently installed 6248 Fabric Interconnect pair are generating a loud FAN noise.
Is there any way to reduce theirs RPM? So then can be quieter? The server room have proper air conditioning.
Some logs as bellow:
FABRIC-A(nxos)# show environment fan detail
Fan:
Module Fan Airflow        Speed(%) Speed(RPM)
             Direction
1       1    Front-to-Back 60        15428
1       2    Front-to-Back 60        11065
1       3    Front-to-Back 60        14835
1       4    Front-to-Back 60        10997
2       1    Front-to-Back 60        15000
2       2    Front-to-Back 60        11134
2       3    Front-to-Back 60        14835
2       4    Front-to-Back 60        11065
Power Supply:
Module Airflow        Configured
        Direction      Speed (%)
1       Front-to-Back 60
2       Front-to-Back 60
FABRIC-A(nxos)#
FABRIC-A(nxos)#
FABRIC-A(nxos)# show environment
Fan:
Fan             Model                Hw         Status
Chassis-1       UCS-FAN-6248UP       --         ok
Chassis-2       UCS-FAN-6248UP       --         ok
PS-1            UCS-PSU-6248UP-AC    --         ok
PS-2            UCS-PSU-6248UP-AC    --         ok
Temperature
Module   Sensor     MajorThresh   MinorThres   CurTemp     Status
                    (Celsius)     (Celsius)    (Celsius)
1        Outlet     67            58           35          ok
Power Supply:
Voltage: 12 Volts
PS Model                Input Power       Power     Status
                         Type (Watts)     (Amp)
1   UCS-PSU-6248UP-AC    AC     780.00     65.00     ok
2   UCS-PSU-6248UP-AC    AC     780.00     65.00     ok
Mod Model                   Power     Power       Power     Power       Status
                            Requested Requested   Allocated Allocated
                            (Watts)   (Amp)       (Watts)   (Amp)
1    UCS-FI-6248UP-SUP      492.00    41.00       492.00    41.00       powered-up
3    UCS-FI-DL2             24.00     2.00        24.00     2.00        powered-up
Power Usage Summary:
Power Supply redundancy mode:                 Redundant
Power Supply redundancy operational mode:     Redundant
Total Power Capacity                             1560.00 W
Power reserved for Supervisor(s)                  492.00 W
Power currently used by Modules                    24.00 W
Total Power Available                            1044.00 W
FABRIC-A(nxos)#

UPDATE
I opened a TAC, then after several reviews of the LOGs and huge sh tech files, we concluded that all was normal. This loud noise is normal   and within in normal operational ranges.
However as the server room is not fully acoustics proof and located near production work desks, we managed to get a RMA for the fan modules for the version 2 modules which are MUCH quieter than V1 due new design.
I have upload both pictures for comparison of the designs.
Thank You!

IMac 27" (Late 2012) Loud Fan and Overheating Issues, causing Hard Drive Failure

Hi all,
I'm having some serious overheating issues with my new iMac. Any help to help me solve this problem would be gladly appreciated since it's really beginning to bug me. Here's what's has happened:
I noticed in the first few hours of switching the iMac on that there was a short burst of very loud fan noise. This has been happening about once every two days since and every time I haven't been doing any heavy processing with the system. I've noticed that the main fan will spin, on average, at 1200rpm. Is that normal? The iMac is very well ventilated and sits right next to a window...
I have also boot camped the iMac with a copy of Windows 8 so I could run some fairly power-hungry games. I intentionally purchased a high end iMac (27" display, Intel Core i7 3.4GHz, Nvidia GeForce 680MX Graphics, 1TB Fusion drive) and expected the iMac to run games flawlessly. However, after a few days, I noticed that the CPU and GPU had shot up to a worrying 80°C whenever I ran power-hungry games, with a very loud hissing noise from the fan. After running games for about 10 minutes, the fan will stop hissing, causing the GPU and CPU to increase to 100°C. The iMac then fails and switches off unexpectedly without any warning. After analysing the Windows event logs, I received an event ID 41: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
As this occurred about six times whilst I was testing my iMac's performance, I think my hard drive has now begun to fail - sometimes I will hear the hard drive make a click noise, about once every 5 seconds. Sometimes, the clicking noise causes OS X and Windows to run very slowly (even though minimal RAM is being used and nothing too intensive (Safari, Mail etc.) is being processed). Running Repair Disk and Repair Disk Permissions under OS X's recovery mode as well as a repair in chkdsk in Windows suggests that there were no problems with the hard drive. All I can do is wait a while for the clicking noise to stop, and then performance will increase. I have backed up everything externally.
I have also performed a reset of the SMC as well as the PRAM, which hasn't really helped.
Any help will be appreciated. I will gladly provide any extra logs etc. if they're needed.
Thanks so much,
Alex.

Alex Cummaudo wrote:
I've noticed that the main fan will spin, on average, at 1200rpm. Is that normal? The iMac is very well ventilated and sits right next to a window...
That's the default fan speed on iMacs, so there isn't any problem with this.
Alex Cummaudo wrote:
I have also boot camped the iMac with a copy of Windows 8 so I could run some fairly power-hungry games. I intentionally purchased a high end iMac (27" display, Intel Core i7 3.4GHz, Nvidia GeForce 680MX Graphics, 1TB Fusion drive) and expected the iMac to run games flawlessly. However, after a few days, I noticed that the CPU and GPU had shot up to a worrying 80°C whenever I ran power-hungry games, with a very loud hissing noise from the fan. After running games for about 10 minutes, the fan will stop hissing, causing the GPU and CPU to increase to 100°C. The iMac then fails and switches off unexpectedly without any warning. After analysing the Windows event logs, I received an event ID 41: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
You must know that Boot Camp isn't compatible with Windows 8 and that Apple hasn't released drivers for Windows 8, so it can fail. Install Windows 7 inmediately until Apple launches updated drivers.
As it looks like the hard disk is damaged, I would take the Mac to an Apple Store. It's in warranty, so it should be repaired for free or you should receive a new one

Mac Mini - Flashing Folder Icon / No boot / Loud fans

I recently got my Mac Mini back after 8 months of it being 'elsewhere' (someone had it, tried to gain access, failed because I have filevault).
When I first got it back yesterday I turned it on, booted and then logged in, noticed no sound, and system was saying there was no sound card. The computer wasn't lagging or freezing whatsoever, so I reset it and still no sound.
I open it up and what do you know, someones opened it (I assume to get to the HDD) and had unclipped the sound card ribbon. Reseated that and put it back together, turn it on and finally a chime, but then nothing, White screen, and fans turn on full blast. I reset it, same thing. Reset it about 10 times, only thing I noticed was half the time my mouse cursor would show and let me move the cursor around.
So I take it apart again, check all connections, restart, same symptoms.
Pull it apart again and try installing 1 RAM chip at a time, same symptoms.
I tried booting it with resetting PRAM, NVRAM, I tried starting holding option, pressing c, everything, and nothing happens! Same symptoms. I tried holding down power for 10 seconds, hear a long beep, then chime, same symptoms!
So I take it apart again, take out hard drive, check connections (all ok), put it back in, same symptoms.
Anyway I got angry so i turned it on and left it doing it's White screen business. Come back 45 minutes later, flashing folder icon with '?'
I reboot, wait 15 again, same folder icon, loud fan, nothing else.
This doesn't make sense, HDD was fine 5 minutes before, no noises at all, no lag, no errors. I didn't touch the hard drive previously to the problem, and now nothing is helping. I've had the hard drive replaced 2 years ago due to near failure, but saved all data by cloning the disk, the HDD isn't old!
I just bought an external HDD enclosure, should arrive soon, and a new HDD, issue is this disk is filevaulted, I'm scared my data is going to be lost for good.
What can I do? I've lost my OS X disc, but judging by the computer being unresponsive to other commands at boot I doubt it would boot a CD anyway.
Please help.
Thanks

Whew, what a bad ride.
Does it also have Firmware password protection in Mac OS X ...
http://support.apple.com/kb/HT1352
It would block usage of all the startup keys, like C, N, T, D, CMD+s, CMD+Option+p+r, CMD +v, Option, and Shift, as well as booting from anything but the Hard Drive.
Force Removing Password Protection
1) Add or remove DIMMs to change the total amount of RAM in the computer.
2) Then, the PRAM must be reset 3 times. (Command + Option + P + R).
http://www.securemac.com/openfirmwarepasswordprotection.php
Does it boot to Single User Mode, CMD+s keys at bootup, if so try...
/sbin/fsck -fy
Repeat until it shows no errors fixed.
(Space between fsck AND -fy important).
Resolve startup issues and perform disk maintenance with Disk Utility and fsck...
http://docs.info.apple.com/article.html?artnum=106214

Macbook pro retina start to make loud fan noise and work slow

I bought macbook pro retina display less than one years ago. For some reason my macbook pro has been making loud fan noise for about five mounth. Whenever macbook pro makes the noise, all the programs start to run slow. Typing, opening safari, and etc takes forever. It takes 20min to 40min for the noise to stop. At first, the macbook pro made noise once or twice in a day, but now it's making the noise frequently; It happens every 2-3 hours. It got to the point where it start to annoying me. Is there a way for me to fix this issue? If not, can I use one year warrenty to fix this problem? Thank you.

If your Mac works slowly when fans turn on, it's quite possible that there's a process which is eating the CPU and/or RAM.
Open Activity Monitor (in /Applications/Utilities), select "All Processes" above "Show" (in the toolbar) and then, order the processes by CPU usage. Do you see any process which is consuming more CPU or RAM? If so, tell us the name.
Additionally, you can reset the SMC > http://support.apple.com/kb/HT3964

IMac G5 keeps freezing/crashing. SMU reset resulted in a loud fan noise.

I have a refubished iMac G5 OS X 10.6.8 desktop that was purchased in Aug, 2006. Recently it has been either freezing, shutting down completely, or the display will just shut off multiple times per day 20+ times/day. I am not interested in purchasing the $49 help from Apple. Is it time for a new computer?
I've been attempting some troubleshooting:
I have plenty of RAM- we installed more memory about 8 months ago.
Temperature running at 40 degrees C
I reset the SMU but now am hearing a loud fan sound and there is air blowing out of the horizontal vent in back of the desktop- which does not typically happen. The computer has not crashed since I reset the SMU 20 minutes ago. I'm worried about the noise.
Also, it has been really hot where I live, with a heat index of 110 today and I don't have air conditioning. Current indoor air temp is about 86 degrees F.
Also, I have been seeing thin horizontal stripes across my screen for the past few months, related or unrelated issue?
Thanks for the help!

Not that this will cure it but it may help:
As old as your iMac is, have you cleaned out the dust? Dust buildup can lead to over heating issues. Remove any and all things plugged into it including the power cord, Remove the RAM access grille. Vacuum all openings starting with the RAM access area (air intake). Vacuum all ports and plugs, DVD slot and the opening across the top of the rear of the body. Blow compressed air through all your openings and vacuum again to remove any dust you loosend. Reinstall the RAM grille. Plug in the keyboard and mouse if not blue tooth. Insert power cord...
You are now in a perfect position to do a
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
It is the 5 second timing that initiates the reset.
Here is a link to a Widget to monitor your temps and other operations:
http://islayer.com/apps/istatpro/

Loud fan noise on mountain lion, Mac Pro early 2008

Hi there,
I've recently installed mountain lion 10.8.5 lon my Mac Pro , early 2008, 2,8 GHz, 24 gb ram, 2x ATI Radeon 2800 XT.
To give it a clean shot i clean installed it on a sep. Partition, no upgrade from my previous Snow Leopard.
The Machine usually works quiet, i've measured via Isat Menu:
exhaust fan: 681 rpm
HD/expansion: 1100 rpm
After running Mointain Lion, latest update version, i get a much louder fan noise than in snow leopard:
exhaust fan: 845-950 rpm
HD/expansion: 1500 - 1800 rpm
The activity monitor shows no significant CPU usage, only the kernal has over 90 threads constantly running.
I've heard that this is a known issue but it's never been resolved. SMC and PRAM reset did not work at all.
when i go back to snow leopard everything gets back to normal. Yosemite is even harder on fan noise than mountain lion
so i've rolled back to mountain lion.
Any idea ?
dezzo

no one here with the same problem on an early 2008 Mac Pro ?

MBP C2D 2.16 - Loud Fans and HDD

I got it today and it runs cooler and faster than the CD MBP that I used for 4 days (this new one is its replacement.)
But I have 2 complaints -
Ultra loud fans, I can't listen to music without getting annoyed even when it is away from my lap, connected to a Cinema Display. The fans turn on very quickly - I don't have to stress it that hard. They turn off only when the machine is idle. Any sort of activity drives the fans crazy.
Next one - the 160Gb HDD makes about as much annoying sounds when active.
Is this stuff normal? At least it wasn't the case with my PowerBook and CD MBP.

I got my laptop last week and at first it did not make any sounds. However last night I was working with WORD and EXCEL and the fans started to turn on, not loud, but they were constantly running. It was kind of interesting cause these apps arent too demanding, but thought nothing of it. Turned on the laptop this morning and the fans started right up again. Currently only using Safari and the fans are still on. Again, they arent running loud, but I can hear them in my room with little background noise, which I did not hear when I first got the laptop. Any words or wisdom or suggestions?
MBP 2.33GHz, 3gigs RAM, 160 HDD Mac OS X (10.4.8)

K7N2 Temperature Sensor Locations

Hey guys, my first post here, have been searching around regarding this subject but to no avail. Where is the system temperature sensor located? I'm getting quite a high readout (44 degrees C) even with my case open and fans at full speed. CPU itself is getting 47 degrees C so I know that's not overheating. I have the latest (4.0) BIOS and have tied back all cables round the case, there is nothing blocking airflow or anything. Could someone please post a picture with a circle around the thermistor? Cheers!
Neil.

first off all.
msi screwed up bigtime with the k7n2 about temps.
it looks like you got it right.
Quote
Temp1 = 43C (NB I assume)
Temp2 = 56C (CPU I assume)
Temp3 = 33C (Ambient case temp I assume)
start speedfan.
click on config
then mark temp1 and press f2 and name it correctly.
then do the same with temp2 and temp3.
try to keep cpu temp under 60 celsius.
if you use and plan to overclock the onboard gfx i recommend you get a fan.
i use a titan vga cooler and it works great.
it got 2 ball bearings and has a expected lifespan of 5.7 years and im running it in silent mode so its not making any noise.

Loud fan while sleeping

After putting iMac to sleep, front panel light does the usual fade in-out cycle 2-3 times, then goes dark and fan begins to run very loudly. Have tried resetting the SMU; didn't help. Any other ideas/suggestions?
(Have also had ocassional issues with not being able to insert disk into DVD drive, which I've been able to fix using fix posted elsewhere on this forum. This iMac is almost 5 -- is it just wearing out?)

Hi PR Girl,
There are quite a few different causes of "sleep" problems of this kind. Generally it means that the operating system has "crashed" when you have attempted to put it to sleep , leaving the computer still running, but in an unstable state without the normal thermal control mechanisms (hence the loud fans, which operate in a "fail safe" full blast manner when they can't get data from the relevant temperature sensors).
Probably the most usual cause of problems are external USB devices attached at the time - third party keyboards and mice, some brands / models of USB hub, other input or output devices , etc. These often "poll" the computer at regular intervals and if their drivers haven't been written right, or they don't comply with USB standards in other ways, then they can cause crashes of this type. Sometimes such things only become apparent after an OS upgrade, leading people to believe that it is the upgrade which is at fault, but generally you will find the third party manufacturer produces new driver software for the device concerned after a few weeks, so it is worth seeing if any relevant updates are available for such things.
Another common cause is third party "background" software that also attempts to access the computer regularly. I've seen sleep issues like this resulting from antiviral software, disk directory checkers, third party "system" and "finder" enhancers and the like. Often in such situations the console logs can provide you with some useful hints.
Cheers
Rod

Loud fan noise while gaming on GT70 gaming laptop

I've loved my laptop ever since I bought it but there seems to be one problem with the fan possibly.
The fan noise is really audible and it gets annoying when I'm gaming. Games like Fable Anniversary (highest setting) forces the fan to be turned on and make loud noises that even wearing a headset wouldn't help avoid. You know how new MSI laptops have a button for turning on cooler boost 2? It feels like it gets turned on by itself while playing some, if not most games.
I would first like to know if this is normal for a gaming laptop. Its REALLY annoying, I even tried the GT70 Fan control 1.63 but the fan keeps turning on by itself. I understand that the GTX 870m gets heated fast and therefore needs to cool off, but like on almost every game.....Skyrim, Tera (not even that demanding.....and not even on max setting ....) long hours of playing league of legends, The Last Remant..etc. I wanna play without such loud fan noises I don't mind if its audible but not too loud, I can even hear the fan noise from upstairs if I leave my room door opened. I would really enjoy playing Tera and Archeage without such irritating, loud sound that really distracts me and makes me fear that its abnormal. Hell, even Rift (MMORPG) released in 2011, would turn on turbo fan.... =(. Any help is greatly appreciated.
Specs:
Name: GT70 2PC Dominator
Intel Core i7-4810MQ
GTX 870m
8gb RAM
1TB 7200 RPM

Quote from: chc on 26-May-15, 11:33:52
There isn't much you can do with the tool but better than nothing.
It didn't fix the fan problem =/
I'm not the only one with such problem, https://forum-en.msi.com/index.php?topic=256673.0 look at the 2nd video and just listen to how loud the fan noise is. (Yes different models but same crap)
The silent option doesn't fully stop/slowdown the fan, maybe just momentarily then once you open up the game, the fan goes back to its usual 3k RPM. Is there ANY way to stop this? its been happening ever since I bought it and it really makes me not wanna play simply because of the noise that is audible even through wearing a headset. Let alone not wearing a headset....
Sad it happens even when playing fifa 15. I mean is fifa 15 even THAT demanding? the answer is no, not even close to demanding as its using the same engine as 13, 14 ..etc. Also, I played it on my old lenovo laptop that had WAY lower specs such as gt 650m graphics card and yet the fan was extremely quiet, and I might add it was on highest setting....
I understand that the gpu can get heated fast, but on almost EVERY game? at first I thought the fan will only make such noises when playing highly demanding games such as Skyrim. A game from 4 years ago without any frkin mods. or Fable Anniversary..OR Prison Break: Conspiracy (what the f?) but it turns out that the fan will go turbo mode on literally every game. so in conclusion, every game is suddenly demanding thus the Cooler Booster 2 will automatically turn on.

Why does my MacBook Pro suddenly turn really really slow and make a really loud fan noise?

Whenever I turn on my MacBook is runs perfectly fine for 2 minutes but then it turns really slow (to the point that it takes ages to move the mouse cursor and to type) and make a really loud fan noise. What should I do to fix this?

Welcome to Apple Support Communities
There's a process that is taking up the RAM and CPU. Open Activity Monitor (in /Applications/Utilities), and select "All Processes" above "Show" in the toolbar. Then, order processes by CPU, and tell me which processes you see that are consuming more CPU

Clicking noise, random loud fan, brand new macbook help?

Ok. Here goes:
Just bought a new macbook 2.16, with 2 gigs of ram from an apple store on Friday. I notice that about every twenty seconds I hear clicks that sound like the harddrive is thinking, followed by a slightly louder fan, and then just as suddenly the louder fan goes away. I downloaded IstatPro and my fan would hover around 1799 but constantly go from 1795 up to 1805.
What's strange is that when it gets louder, I don't hear it go up to speed like my Imac used to do, and it's not a higher frequency but sounds like something that was in front of the vent kind of jumped to the side, and now it's just louder.
It's annoying. I would much prefer a constant 1800 whir which is actually quite pleasent.
Let me know if this is normal fan activity. Or any idea of what this could be. Besides that the computer is running great. I'm going in on Saturday and possibly asking for a new computer? Just now afraid that I might not get something better. Also the box the computer came in was really dirty, and a little banged up. Do they used recycled boxes, or could I have possibly got a previously owned unit? Thanks. sorry for the long post...

... we've got the same machine. mine's a month old; it sounds exactly as you describe. the fan noise increases with cpu load, and on mine doesn't start to bug me until around 3,000 rpm and gets real loud ~6. the last laptop I had, a win machine, was absolutely silent until I saved to the hard drive or opened a new program. the keyboard was silent too. so I got spoiled. I did about a 100 page search here and it seems common for the macbook to run noisily and hot. I haven't been able to get a definite yes or no from any genius or tech on whether the fan is designed to ever shut off, but from what I've found out, I would guess not. The cd/dvd drive crunches and clunks when it grabs a disc (there's a recording of this on the apple site indicating it is normal)and when it spins up, sounds like the machine will lift off the desk -- which I have read other users say.
take an hour and search here. between user comments and moderator replies, and the apple tech docs, there's a lot of info.
hope that helps.
--h

MSI-6309 (694T Pro) Temperature sensor locations

does any one have any idea where on this board are the 3 Temperature sensors located?
some sources sugest that 1 is located onboard the Southbridge but the remaining 2 are a mystery
like is the CPU temperature read from the CPUs thermal sensor or is it located at the motherboard ?(
-Mikko

it can't be a ram configuration issue.. because the exact same configuration worked flawlessly for almost a year..
i tested the volts on the PSU with a volt meter and the 5v and 12v rails measure very close to spec, within 5%
i basically took one of the molex connectors and plugged my volt meter leads into the appropriate colors (black and yellow, black and red). and i just let it sit while i turned on my computer and did stuff..
is there a better way to test it? if the psu wasnt giving enough power i would expect playing a game or 3dmark or some sort of load would cause the system to crash relatively quickly, and not randomly while the computer is idling and such
thanks for the help guys =D

RAM riser sensor location? Loud fans.

Similar Messages

Maybe you are looking for