Can an iMac (Retina 5K, 27-inch, 2020, i5) with 2x4Gb 2666 MHz DDR4 RAM be updated with 2x4Gb 2400 MHz DDR4 RAM (from an iMac Retina 5K, 27-inch, 2017)?
If yes, it is my understanding that the iMac 2020 runs at the level of the older RAM, is that true?
If that is true, would the loss of performance with the mixed setting as described above be large?
What do you think is a better setting (of course 16 Gb 2666 would be the best):
- only 8 Gb 2666 DDR4 or
- 16 Gb mixed DDR4 RAM?
The iMac is used for office work and the SWAP is usually around 600 Mb.