upgrading RAM

[MacKnut]

About to get a new iMac 27'' 3,7/8/1TB SSD/580X. When upgrading RAM with two 16 GB modules, will I need to remove the existing two 4GB modules to avoid bottle neck problems when running memory-hungry graphic programs?

 

[marzfreerider]

As long as the specs are the same you ordered, you should be fine. Just put the new sticks in the empty slots and have 40 GB of RAM.

 

[Glockworkorange]

About to get a new iMac 27'' 3,7/8/1TB SSD/580X. When upgrading RAM with two 16 GB modules, will I need to remove the existing two 4GB modules to avoid bottle neck problems when running memory-hungry graphic programs?

No.

 

[warp9]

Pardon the thread hijack. I just ordered a refurb 27" with 16GB ram. Would this be in the form of 4x4GB, 2x8GB, or 1x16GB?

 

[DerKommissar]

Pardon the thread hijack. I just ordered a refurb 27" with 16GB ram. Would this be in the form of 4x4GB, 2x8GB, or 1x16GB?

I think it would be likely to be 4x4gb, given that the 8gb config is 2x4gb. 1x16 go is right out.

 

[Hawaiian Starman]

I’m using the original 2 - 4GB sticks plus 2 OWC 16GB sticks for 40GB on my 2017 3.8 iMac. Graphic performance is fast.

 

[warp9]

Ok thanks. I've picked up a 2x8GB kit so I guess the worst case scenario is 24GB.

 

[warp9]

The Mac arrived and the memory arrangement is 2x8GB. It's a refurb so I don't know if the ram is OEM or not. It's Micron 8ATF1G64HZ-2G6E3.

 

[DeltaMac]

If that's an Apple refurb iMac (that you purchased from Apple), you can assume that the RAM is "OEM", and tested.