Need Guidance Upgrading NVMe & Migration

[mrvo]

So I got:

old iMac 21.5-Inch "Core i5" 2.7 (Late 2012) - with 1TB Fusion

new iMac 21.5-Inch "Core i5" 3.0 (4K, 2019) - with 1TB Fusion, 8GB RAM

new OWC Aura Pro X2

new Timetec Hynix IC 32GB KIT(2x16GB) Compatible for Apple 2019 iMac

I'm planning to:

upgrading the new iMac with OWC NVMe, 32GB RAM and delid/LM the i5-8500

migrate a-z from the old iMac to the new iMac (what's the best and seamless way?)

putting the existing Fusion setup from 2019 iMac back in 2012 assuming that the spanking new Fusion drive is a tad faster (now is this compatible backward? how do I setup or migrate the entire fusion drive?)

 

[nicho]

putting the existing Fusion setup from 2019 iMac back in 2012 assuming that the spanking new Fusion drive is a tad faster (now is this compatible backward? how do I setup or migrate the entire fusion drive?)

Not sure that would be the case - AFAIK the SSD in the earlier one is 128GB but the new one only has a 32GB SSD.

 

[mrvo]

Not sure that would be the case - AFAIK the SSD in the earlier one is 128GB but the new one only has a 32GB SSD.

you're right, I just checked again, thought it was initially 32GB

p.s: just ran black magic disk speedtest against each other, the 2019 is significantly faster, like 3 times. So is it compatible backward?

p.p.s: 2012 has mSATA interface whereas 2019 has PCIe 3.0 x4 interface

 

[Fishrrman]

My opinion only, but I wouldn't break open a brand-new 2019 iMac to "upgrade" it.

If you break something, you not only forfeit the warranty, but you'll have to PAY for the repair, as well.

Are you willing to shoulder that risk?

What read/write speeds are you getting from the 2019's fusion drive RIGHT NOW?

 

[mrvo]

My opinion only, but I wouldn't break open a brand-new 2019 iMac to "upgrade" it.

If you break something, you not only forfeit the warranty, but you'll have to PAY for the repair, as well.

Are you willing to shoulder that risk?

What read/write speeds are you getting from the 2019's fusion drive RIGHT NOW?

My bad, as far as I can tell it’s in very new condition, open-box unit, warranty is only 3 months left anyway.