RAM Upgrade New iMac 27"


hi,

awaiting new imac 27" should arrive week. purchased 64 gb of recommended ram ( https://eshop.macsales.com/item/other world computing/2400ddr4s64s/ ). question is,

option 1: matter if install ram upgrade 'before' turn on computer first time?

or

option 2: should boot first time existing oem ram......then turn machine off , install upgrade ram?

configuration posted below.

in advance,

joe

-4.2ghz quad-core 7th-generation intel core i7 processor, turbo boost 4.5ghz
-16gb 2400mhz ddr4
-1tb ssd
 

the reason doing option 2, guarantee imac delivered in 100% functioning condition.

cautious guy, , therefore go option 2. because know brain torture me if replace ram first, , computer won't turn on :)
 


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