Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor

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Can replace 1Tb HD in iMac 2011 with two disk

I've iMac middle 2011 with two disk (SSD 256 + 1Tb HD).

I want to replace 1Tb with SSD 512 Gb. What do I need? And how can do it?

Finally, can I set replace SSD main disk and install Mountain Lion on it?

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Can you give us the last four digits of your serial number so we can correctly ID your system.

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Last four digits are DHJW

And If I want to replace actual SSD 256Gb with larger and more performant disk? Wich model?

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And can also replace internal 1Tb with 2 Tb?

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iMac "Core i5" 2.7 27-Inch (Mid-2011) 2.7 GHz Core i5 (I5-2500S)

- Intro Date: May 3, 2011 Disc Date: October 23, 2012 Model No: A1312 (EMC 2429)

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Hi Dan, my iMac is a 3,4 Ghz Intel Core i7. This change something?

Actual SSD is placed in a more accessible point. There is an image of this?

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If your current system has two drives now and you still have your optical drive working you maybe able to convert it to a third drive. Otherwise your limited to the number of SATA ports you have.

As to running with two SSD's I wouldn't recommend that, while there is nothing stoping you in doing that you technically. You're not gaining enough performance and you are loosing storage as the HD is still larger than the SSD you're replacing it with. I would likely up the SSD size and maybe upgrade the HD to a faster & larger drive.

The best layout currently is to have your SSD the boot disk directly on a SATA port and then having your HD on either on the second SATA port or via an adapter (PATA to SATA) with the SATA HD mounted in the optical drives location. But, until you tell us which model you have this answer could change.

And yes, Mountain Lion would be the best OS to use with a SSD setup.

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