Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.


macrumors 6502a
Original poster
Sep 25, 2007
I'm going to be placing an order soon for a new 27" iMac. I was originally planning on buying 16gb of RAM to upgrade from 8-24gb. I am getting rid of my old 2009 iMac which I upgraded to 8gb of RAM a few years ago. It has two 4gb 1067 DDR3 ram chips in.

Would it make sense to utilize these old RAM chips to save a little money or would that RAM be such a step down compared to the 2400mhz DDR4 that I really shouldn't think about using them.



macrumors G5
Jun 18, 2017
They wouldn't even fit. And no, you can't use slower RAM than spec'd.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.