iMac 2014 Late i7 - Problem with 32G

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dulishacom Author

Level 1

6 points

iMac 2014 Late i7 - Problem with 32G

I have problem with adding 32G to my iMac 2014 late.

- Tested with Crucial 4x8G

- Tested with G Skill 4x8G

- Tested with new Crucial Pair 4x8G

All of them were new un-packed memory. All of them have been setup in right way.

- Problem appear only when i add 8G memory to 3/4 slot on iMac. There are three beeps on start. Or it will start, and shutdown starting with 3 beeps.

Have been tested with Crucial 4x4G and original Apple 4x4G all slots are working correctly. El Capitan is starting without problem when i use all 4, but only with 4G per slot.

Once when i add 8G to third or four slot, problem appear. Anyone had this problem before? How i can boot/or get into some kind of bios for motherboard, so i can check what's the problem?

Regards, D

iMac (Retina 5K, 27-inch, Late 2014)

Posted on Apr 30, 2016 1:19 PM

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Answer 1

dialabrain

Level 10

122,627 points

Apr 30, 2016 1:51 PM in response to dulishacom

What spec 8GB modules did you buy?

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Answer 2

dulishacom Author

Level 1

6 points

May 1, 2016 2:23 AM in response to dialabrain

32GB Total. 4pcs 8GB PC3-12800 204 pin SODIMM DDR3 1600MHz

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Answer 3

dialabrain

Level 10

122,627 points

May 1, 2016 3:06 AM in response to dulishacom

That is the correct memory. Make sure they are all seated properly. It's unlikely you would have received 3 sets of bad RAM. Try testing with 2x8GB modules in bank 0. If they seem to work, move them to bank 1. Remove those and test the remaining modules the same way.

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Answer 4

dulishacom Author

Level 1

6 points

May 1, 2016 8:34 AM in response to dialabrain

Unlikely have been try all ways possible for this. Sometimes it's going to start the system, and after some hours of work it will shut down un-unexpectedly.

I follow your example with original slots from Apple 2x4GB

I put them at bank 0 and try to start, not working. (3 and 4 slot i assume)

Even with Slot 0 and Slot 3, Slot 0 and Slot 4 not working.

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Answer 5

SeaPapp

Level 7

26,486 points

May 1, 2016 8:48 AM in response to dulishacom

Return all of the ram and replace it with ram from OWC http://eshop.macsales.com/

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Answer 6

dulishacom Author

Level 1

6 points

May 1, 2016 11:23 AM in response to SeaPapp

I am afraid that it's nothing with memories and more like inside software problem, or damaged slots.

Not possible 3 pairs to be false.

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Answer 7

SeaPapp

Level 7

26,486 points

May 1, 2016 3:07 PM in response to dulishacom

dulishacom wrote:

Not possible 3 pairs to be false.

Sure it is. There was some question early on with 32Gb of ram wether the ram should be 1.35v or 1.5v maybe that's raising it's ugly head again. Are you buying direct from Crucial using their Advisory Tool or System Scanner or from a third party?

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Answer 8

dulishacom Author

Level 1

6 points

May 2, 2016 12:51 AM in response to SeaPapp

I have been tested with original 4GB Apple RAM.

- 4GB on first slot

- 4GB on third slot (not working)

-4GB on first slot

-4GB on four slot (not working)

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