2017 iMac important to used matched RAM pairs?

mikepro

macrumors 6502
Original poster
Sep 3, 2010
427
17
I remember back in the day with dual channel DDR2, it was important to install 2 identical matched pairs in a bank for optimal performance. Is that still true with current day iMac? In other words, if I want to add 16 GB, better to get 2 matched 8GB than a single 16GB stick of RAM?

Thanks!
 

Fishrrman

macrumors Core
Feb 20, 2009
19,058
6,509
On paper, "matched pairs" of RAM will always look better.

In real life, you probably won't notice any difference at all.

I replaced one of the 2gb DIMMs in my 2012 Mini with an 8gb DIMM.
Looks and runs the same... to me.

If you feel like splurging, put 2 DIMMs in.
If not, add just one.
I'll betcha either way runs just fine.
 
Comment

Luxtrau

macrumors member
Jun 16, 2017
76
25
Germany
I did some benchmarks with mixed and matched pairs. The matched ones are always slightly faster. If you notice a difference in daily use - I don't know. But yes, if you want to use the full potential use matched pairs.
 
  • Like
Reactions: SaSaSushi
Comment
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.