2017 iMac with 64gb ram keeps crashing under heavy workload

[LTMstudios_Andy]

Hello everyone just wondering if anyone is experience crashes under heavy cpu workloads ie exporting large amount of photos or exporting 4k footage. My iMac specs is
-
2017 iMac i5 7600K
64gb ram (Corsair 4 x 16gb ddr4 2400mhz sodimm ram) Ram was tested with Rember and it passes the test

It also crashes if i just use 2 x 16gb dual channeled in the middle of export.

I placed back my 32gb of ram (4 x 8gb Corsair ram) and it works fine. It seems like running anything over 8gb sticks it can't handle it? If anyone experience this problem please chime in. Help much appreciated. Thanks.

 

[keysofanxiety]

Sounds like one of the 8GB DIMMs you have might be faulty. You could try making a bootable MemTest USB, run the test on startup (hold Alt, boot into the USB), and see if that comes up with any errors: https://www.memtest86.com/download.htm

 

[LTMstudios_Andy]

Sounds like one of the 8GB DIMMs you have might be faulty. You could try making a bootable MemTest USB, run the test on startup (hold Alt, boot into the USB), and see if that comes up with any errors: https://www.memtest86.com/download.htm

Thanks. Does this MemTest work with Mojave 10.14? I tried downloading it and it says it won’t install due to the incompatible osx

 

[nambuccaheadsau]

One of the 16GB is failing by the sound of things as it runs okay on 4x8GB modules.

Take them all out, and place in first pair and see if it crashes, and change one module at a time until the four are thoroughly tested. Not a fan of Corsair and prefer Crucial. From the below link quote:-


'Unfortunately, Apple systems are something special and not every memory works.'


https://translate.google.com.au/translate?hl=en&sl=de&u=http://forum.corsair.com/v3/showthread.php?t=129977&prev=search

 

[mbosse]

One of the 16GB is failing by the sound of things as it runs okay on 4x8GB modules.

Take them all out, and place in first pair and see if it crashes, and change one module at a time until the four are thoroughly tested. Not a fan of Corsair and prefer Crucial. From the below link quote:-


'Unfortunately, Apple systems are something special and not every memory works.'


https://translate.google.com.au/translate?hl=en&sl=de&u=http://forum.corsair.com/v3/showthread.php?t=129977&prev=search

Corsair is known to cause problems on Macs. Crucial usually works fine, as do the OEMs Apple uses (Elpida, SK Hynix and Samsung).

 

[LTMstudios_Andy]

Thanks everyone for the response. I got replacements and did Rember tests on all ram and it works fine now. Such a hassle though. Probably last time I buy corsair for mac...