REALLY loud fan since installing SSD, is this normal?

[snerkler]

The fans are small, thus the loudness. It is a laptop/notebook after all.
And as the iPhone has a CPU with at least 600 MHz, using such a small device without a fan to its limits can cause higehr CPU temps.

Whilst I understand it is only a laptop, it's not the first laptop I've owned and none have been loud like this before. It's no biggie, as it only does it when doing a lot of CPU intensive stuff, and for everyday usage it's fine. I'm just surprised that how loud it is compared to other much cheaper laptops I've had.

 

[throAU]

Sounds like you forgot to plug a temperature sensor back in...

 

[simsaladimbamba]

Whilst I understand it is only a laptop, it's not the first laptop I've owned and none have been loud like this before. It's no biggie, as it only does it when doing a lot of CPU intensive stuff, and for everyday usage it's fine. I'm just surprised that how loud it is compared to other much cheaper laptops I've had.

Those cheaper laptops were probably not as thin as the MBP? If that was the case, then the fan(s) in there was/were probably a bit bigger or didn't spin as fast.
The fans in MBPs can spin up to 6000 RPM, which is fast, that is 100 spins per second.

 

[snerkler]

Sounds like you forgot to plug a temperature sensor back in...

Could you expand on this a little more please? I didn't unplug anything when swapping the HDD over except for the sata plug. iStat pro can monitor the temperature of the CPU so wouldn't this suggest the sensor is plugged in How do I check if the sensor is plugged in and working?

Cheers

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Those cheaper laptops were probably not as thin as the MBP? If that was the case, then the fan(s) in there was/were probably a bit bigger or didn't spin as fast.
The fans in MBPs can spin up to 6000 RPM, which is fast, that is 100 spins per second.

Image​

Mine spin over 6000RPM, I've seen speeds up to 6300rpm according to istat

Do you also think it could be a sensor problem as mentioned by throAU?

 

[snerkler]

Hmm, I think I may have an issue with a sensor monitor. I've just downloaded a program called temperature monitor http://download.cnet.com/Temperature-Monitor/3000-2094_4-41089.html and it gives temperatures for CPU core 1, 3 and 4 but CPU core 2 just reads --- Does this mean something's wrong, how can I fix it?

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Update on the post above. Whilst I was converting a video from.mov to MP4, temperature monitor didn't register the CPU Core 2 temperature, and Core 4 kept going from a temperature reading to ---. Now the video conversion has finished and the CPU's cooled, Core 2 is now reading a temperature, in fact all 4 are reading a temperature.

Actually as I'm typing this, Core 2& 4 have just gone again. Do I have a problem with my computer or not?

 

[throAU]

Open the case back up and check for any loose/disconnected cables. It should be a 2 wire cable with a small plug on it.


edit:
check ifixit.com for the relevant macbook teardown, and check for any of the temp sensors mentioned...

edit:

I haven't pulled the drive out of my macbook yet, but i had a similar problem with my mini - forgot to plug a sensor back in and the fans went berserk.

Basically the fans will spin up when
- the temp gets hot
- the temp can't be measured due to sensor unavailability/failure (this is a fail safe - "if i can't read the temperature, i'll assume it's hot and try to cool down!")

 

[snerkler]

Open the case back up and check for any loose/disconnected cables. It should be a 2 wire cable with a small plug on it.


edit:
check ifixit.com for the relevant macbook teardown, and check for any of the temp sensors mentioned...

Where in particular should I be looking, near the fans? I don't see why this should have unplugged itself though

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Open the case back up and check for any loose/disconnected cables. It should be a 2 wire cable with a small plug on it.


edit:
check ifixit.com for the relevant macbook teardown, and check for any of the temp sensors mentioned...

edit:

I haven't pulled the drive out of my macbook yet, but i had a similar problem with my mini - forgot to plug a sensor back in and the fans went berserk.

Basically the fans will spin up when
- the temp gets hot
- the temp can't be measured due to sensor unavailability/failure (this is a fail safe - "if i can't read the temperature, i'll assume it's hot and try to cool down!")

I'll open it up shortly, but the only cable I unplugged was the sata, and I've not heard anything about temperature sensors being on the sata plug for macbooks.

I want to clarify that the fans aren't running fast all the time, only when rendering HD video, or importing large photos files to a program. Using apps, web browsing, transferring files et does not cause the fans to spin up.

Now the temp is reading unusually low, it's reading 44 degrees :/

 

[throAU]

check the ifixit.com teardown.

if you can't find/fix it, you may have to live with it or get apple to check it out.

 

[snerkler]

check the ifixit.com teardown.

if you can't find/fix it, you may have to live with it or get apple to check it out.

I don't mind living with it if it's normal. I just want to make sure it's normal, and that something's not broken.

 

[snerkler]

A noise isn't nomal

Are you sure, I've found plenty of threads on fan noise with the MacBook pros since I started this thread. I'll make a video and post it on YouTube and then see if the consensus is whether it's excessive or not.

 

[simsaladimbamba]

Are you sure, I've found plenty of threads on fan noise with the MacBook pros since I started this thread. I'll make a video and post it on YouTube and then see if the consensus is whether it's excessive or not.

It was a SPAMMER, don't listen to those. As you can see, the post got deleted.