Reported memory speed in about this Mac

[Quinten07]

Hello,
I was wondering if anybody knew if the speed that the OS reports the memory runs at is the actual speed the memory runs at.
For example: I have upgraded my mid-2017 5K IMac from 8gb 2400 m/t to 32gb 3200 m/t. The systems report the ram correctly and running benchmarks show an increase in performance. Is there a definite way to check if the ram is running correctly?

 

[joevt]

Is there a definite way to check if the ram is running correctly?

Not really. I think all you can do is what you've already done which is compare benchmarks before and after.

I'm not sure if the reported speed matches the speed that is being used.
https://discussions.apple.com/thread/8591412

I think what you need is a utility that can show the timings that are being used by the ram chips. If you installed Windows, then you could try CPU-Z.
https://superuser.com/questions/423...ory-and-spd-tab-discrepancy-what-do-they-mean

 

[Quinten07]

Yeah I already planned installing windows on it. Was just a bad idea with the original fusion drive so first had to upgrade from that. I will install windows on it and for once and for all determine if the IMac 2017 can use faster DDR4 than the standard 2400mhz ram.

 

[Quinten07]

For anyone interested in this topic:

I have tested the 3200 MHz ram speed under windows 11. The memory modules do run at 3200 MHz and gain the full performance benefit from the faster data transfer rates.

This means people are not limited to the 2400 MHz or 2666 MHz ram that is officially supported by your Mac. The difference in performance might not be as big as adding more memory but it is definitely a difference!

 

[TheSufle]

Quinten07​

what RAM model did you use?

 

[TheSufle]

what RAM model did you use?

 

[Quinten07]

I really don’t remember unfortunatly I believe it was a crucial 2x16 set 3200mhz. I upgraded to a M1 IMac a few weeks later so I do not have the machine anymore