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A2116 / 2019 / 3.6 GHz quad-core i3, 3.0 GHz 6-core i5, or 3.2 GHz 6-core i7 processor. Released March 19, 2019.

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Having problems upgrading i3 with i7 CPU


I have a 2019 21.5” iMac i3 3.6 GHz I3-8100 with 8GB

I first upgraded the HDD to SDD which works perfectly

Next I upgraded the RAM from 8GB to 32GB and it too works perfectly.

Finally I bought a new CPU [Intel Core i7-8700 3.2 GHz] but it didn’t work.

I’ve already tried re-installing my old CPU [Intel Core i3-8100 3.6 Ghz] and that works just fine again.

What was the problem? And which CPU do I have to buy to upgrade my iMac.

Thank you for your attention.

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Hi! I have the same issue. When I tried to upgrade the CPU from the same i3 8100 to the same i7 8700 the system won’t turn on. When I came back to the original i3 8100 everything was fine.

Is it possible to upgrade the base model’s CPU to anything?

I read something about micro-code in the iMac’s bios, but the same iMac has the configuration with the same i7 8700 cpu. It must be compatible!

Where’s the catch ?

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SERGIO GIRALDO sera éternellement reconnaissant.
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