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Model A1418 / Late 2012 / 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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Can I replace my regular HD with SATA SSD (Samsung EVO 850)?

Can I replace my regular hard drive with a SATA SSD like the Samsung EVO 850/750?

Will I have problems with the fan speed I have read about?

I've read some say that their fan sped up, others say that it didn't.

for the 2012 imac 21.5. Does the fan really speed up?

I don't mind my fan being a bit loud. I just don't my fan breaking because it's at max all the time.

What are they referring to? CPU fan?

Will my fan be 100% full power all the time?

I don't want to install fan software. Is there another solution to the fan problem if the fan problem really is an issue?

Will my my SATA SSD fit perfectly?

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Выбранное решение

To start off you'll need to follow this IFIXIT guide: iMac Intel 21.5" EMC 2544 Hard Drive Replacement to swap out your current 2.5" HD for the Samsung 840 or 850 EVO SSD unit.

Frankly, I would leave the HD alone here and instead install the PCIe blade SSD. Here is the IFIXIT guide to do this: iMac Intel 21.5" EMC 2544 SSD Replacement. The Samsung 850 PCIe M.2 blade SSD will not work in this system. You'll need either the custom Apple Blade SSD or this one from OWC: SSD upgrades for late 2012 iMac's.

In either case you need to be very careful removing the display assembly as it is very easy to damage if you don't use the correct tools or fail to follow the IFIXIT guide to the letter.

Update (02/26/2016)

To answer your direct questions:

  • Will I have problems with the fan speed I have read about? No
  • I've read some say that their fan sped up, others say that it didn't. For the 2012 iMac 21.5" does the fan really speed up? - No, The larger 27" model use a 3.5" drive that uses a custom built-in thermal sensor. Which you need to deal with. The 21.5" models use a standard 2.5" laptop drive
  • I don't mind my fan being a bit loud. I just don't my fan breaking because it's at max all the time. If you have a racing fan you have a problem that needs to be fixed. Often its an error in re-assembly
  • What are they referring to, CPU fan? Over time Apple has reduced the number of fan units. The 21.5" model only uses One fan
  • Will my fan be 100% full power all the time? No
  • I don't want to install fan software. Is there another solution to the fan problem if the fan problem really is an issue? The 21.5" models don't have an issue only the 27" models
  • Will my new SATA SSD fit perfectly? Yes, the 2.5" SSD is the same size as the 2.5" HD your system currently has
iMac Intel 21.5" EMC 2544 Hard Drive Изображение

Инструкция

iMac Intel 21.5" EMC 2544 Hard Drive Replacement

Сложность:

Модерировать

25 minutes - 1 hour

iMac Intel 21.5" EMC 2544 Blade SSD Изображение

Инструкция

iMac Intel 21.5" EMC 2544 Blade SSD Replacement

Сложность:

Модерировать

2 hours

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Thank you very much.

Appreciate the clear answer, and knowing that I won't have any fan problem completely made my day!

Thank you!

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Hi filetranfer, I'm planning to do the same on a same model iMac (2544), did you end up doing it and if so can you share your experience? Thanks!

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Your Samsung SSD should work fine in your iMac. While replacing it, make sure you do not damage the thermal sensor while removing the hard drive or else your fan will run at %100 speed all the time.

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I cannot find the thermal sensor when looking at the iMac Hard Drive replacement guide. Would you mind letting me know where it is so I can watch out for it?

thank you.

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