I would test by swapping one of your 8s to a slot currently occupied by a 4 & see if the Memory Slot Utility has anything to say about it. Normally, the optimum configuration is to have matching pairs in each bank, which would make your current setup non-optimal.
#2015 imac memory upgrade install#
If the DIMM configuration you install doesn't provide optimized performance, the Memory Slot Utility appears onscreen and recommends an improved configuration. Note: If you install different-size DIMMs in your Mac Pro, follow the order in the table. The equivalent page for my machine has this to say…
#2015 imac memory upgrade how to#
…though strangely that page has no opinion on how to optimise for different RAM configurations. I have a different machine, but I think the link ought to take you toĪpple KB - iMac: How to remove or install memory Menu > About this Mac > Memory > Memory Upgrade instructions You can find optimal memory location instructions by going to Cannot tell if this is a good layout for dual channel mode though. I know, its not a scientific answer with hard facts but I would still suggest this layout. After that change the issues with the game crashes were gone. I thought to give it a try and placed the original modules in slots 1&2 (bank 0) and the new modules in slots 3&4 (bank 1). Searching the internet I found some sites suggesting that memory modules of the same type should be in the same bank. But of course all my modules were 8 GB - so equal size. But the guide doesn't mention anything about the correct slot usage.Ĭontacted the vendor and they told me that it would be best to use slot 2&4 for the larger RAM modules and 1&3 for lower modules. After I noticed the crashes I searched the internet and also found the apple instructions mentioned ( ). I had 2x8GB original RAM installed in slot 1&3 and I placed the new modules into the slots 2&4. This did not happen before I added the two new RAM modules and I changed nothing else. Both games crashed to the desktop after 5-20 minutes of gameplay. Well, initially not (for a day or so) but after I wanted to play some games in Windoes 10 on bootcamp (Battlefield1 and Dragon Age Inquisition, both using the Frostbite Engine) I faced some issues.
I recently bought RAM from a thirdparty vendor and faced the same issue/question.
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