Replace all RAM modules with lower hz

[tofagerl]

Once and for all, since I googled without finding a straight answer: If I replace the modules that come with the 2015 iMac 5k (1833MHz) with new ones with 1600MHz, will that work?
What will be the downside of using cheaper and slower ram? Disregard that I'm obviously replacing it with MORE ram, I'm just looking for a quick plus/minus of the MHz. (The minus is the price and availability of the faster ram)

 

[maflynn]

Well it would seem nothing much because Apple states that you should be using 1600MHz ram

 

[MH01]

I think you will find the 1833 is running at 1600 anyway.

 

[tofagerl]

Hey, better than I hoped

 

[redheeler]

Well it would seem nothing much because Apple states that you should be using 1600MHz ram
View attachment 640657

It doesn't look like the list was updated to reference the iMac (Retina 5K, 27-inch, Late 2015). But I agree that downgrading to 1600 MHz, or upgrading to 2133 MHz, will work fine even if Apple doesn't advertise compatibility.

 

[maflynn]

It doesn't look like the list was updated to reference the iMac (Retina 5K, 27-inch, Late 2015). But I agree that downgrading to 1600 MHz, or upgrading to 2133 MHz, will work fine even if Apple doesn't advertise compatibility.

Good catch - I saw 2015 and I grabbed the screen shot.