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After upgrade ram, iMac start 3 beeps

Hi Guys, i have try to upgrade my ram from 8G to 32G with new slots of memory.

It went all well. I have been setup the RAM, and it's was working very well.


I put my PC on sleep, then i wake up with strange beep sounds. I had to shutdown. I try to start it again, only blank screen with 3 beeps again.

I try different combinations for slots positions ( 2 first slots works well ) if i put memory on 3 or 4 slot, it's getting the beep, no matter what.


Please let me know for your solution.

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

Posted on Apr 15, 2016 3:11 AM

Reply
23 replies

Apr 15, 2016 9:49 AM in response to Lexiepex

Guys, it's kind like not supported to handle 32G From Crucial.

Only two slots working correct. I try to do with 3 or 4 ( not working )


Here is the image that slots are correctly setup:

User uploaded file


I use to start the system first time, with all 4 slots. Than, after 8 hours aprox, when computer i turn to sleep, it's start the beeping sound. I was not able to start it from then with all 4 again.


Any another reason or ?

Apr 15, 2016 2:16 PM in response to dulishacom

Memtest version 4.22 (64-bit)

Copyright (C) 2004 Charles Cazabon

Copyright (C) 2004-2008 Tony Scaminaci (Macintosh port)

Licensed under the GNU General Public License version 2 only



Mac OS X 10.11.4 (15E65) running in multiuser mode

Memory Page Size: 4096

System has 8 Intel core(s) with SSE

Requested memory: 27901MB (29257338880 bytes)

Available memory: 27901MB (29257338880 bytes)

Allocated memory: 27901MB (29257338880 bytes) at local address 0x0000000101000000

Attempting memory lock... locked successfully

Partitioning memory into 2 comparison buffers...

Buffer A: 13950MB (14628669440 bytes) starts at local address 0x0000000101000000

Buffer B: 13950MB (14628669440 bytes) starts at local address 0x0000000468efc800



Running 1 test sequence... (CTRL-C to quit)



Test sequence 1 of 1:



Running tests on full 27901MB region...

Stuck Address : setting 1 of 16 ok

Linear PRN : setting 1 of 16 ok

Running comparison tests using 13950MB buffers...

Random Value : ok

Compare XOR : ok

Compare SUB : ok

Compare MUL : ok

Compare DIV : ok

Compare OR : ok

Compare AND : ok

Sequential Increment: ok

Solid Bits : setting 1 of 64 ok

Block Sequential : setting 1 of 256 ok

Checkerboard : setting 1 of 64 ok

Bit Spread : setting 1 of 128 ok

Bit Flip : setting 1 of 512 ok

Walking Ones : setting 1 of 128 ok

Walking Zeroes : setting 1 of 128All tests passed! Execution time: 6729 seconds.

After upgrade ram, iMac start 3 beeps

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