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RAM upgrade on iMac 2017

Hi all

I have just purchased an core i7 2017 iMac 27" which came with the standard 8GB RAM - This came configured with 2 x 4GB cards, occupying slots 1 and 3

I then added my additional 2 x Crucial 16GB cards in the remaining slots 2 and 4 but the machine would not boot up.

I then moved the original 4GB cards to slots 1 and 2 and placed the 2 x Crucial 16GB cards to slots 3 and 4 and it booted up

Questions - Why did it not work like all the literature and YouTube videos told me to configure it and is my system going to work in the best way with this configuration?

Thansk for any thoughts/comments

iMac's like RAM installed in matched pairs. Sounds like your original install was not matched or the new RAM was not seated well.

Hi

No, the RAM was correctly installed in Slots 1 and 3

Presumably this is as a 'pair' so my installation would meet your comments - So why does my iMac not boot up - Looks like I now have to have it as 'unpaired' in order to boot up !?

最後更新：2017-09-09 03:42:17

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