MBP Fans Coming On With Filevault 2 and Yosemite

[Apple_Robert]

Recently installed a new Crucial Mx100 SSD (512GB) on my late 2011 MBP with 8 GB RAM. Did a clean install of Yosemite along with clean install of apps. During the install, I did the default 'enable FileVault." No problems with install. However, I noticed that during boot up, the fans will kick on each time and cut off once home screen was done loading apps etc. I may be wrong here but, it seems that the fans run a little more often with Filevault 2 turned on.

Has anyone else experienced this? As a temporary test, I turned off FileVault, and the fans haven't turned on at boot. I am just curious why the fans would need to come up with the former. Is it normal?

 

[Weaselboy]

I don't have an answer why, but my 2014 13" rMBP does the same thing with FV2 on. I get a brief fan whoosh.... at startup then it goes back to normal. Does not seem to be hurting anything.

 

[Apple_Robert]

I don't have an answer why, but my 2014 13" rMBP does the same thing with FV2 on. I get a brief fan whoosh.... at startup then it goes back to normal. Does not seem to be hurting anything.

Thanks for the reply.

I also noticed that shut down is several seconds faster, not that that is a big deal for me.

Have you noticed the fans (overall) turning on a little more often with general use with FileVault 2 on, or just at boot?

 

[Weaselboy]

Thanks for the reply.

I also noticed that shut down is several seconds faster, not that that is a big deal for me.

Have you noticed the fans (overall) turning on a little more often with general use with FileVault 2 on, or just at boot?

After the boot, I don't notice any difference with the fans having FV2 on.