Interesting problem

[dizmonk]

So I added 2 16gb sticks of memory to the new 2020 iMac. Everything was running fine but my download speed. I normally get 300gb but with the additional memory I was getting 215 with downloads constantly stopping. Just for my own curiosity I took out the 32gb and repositioned the original 8gb I got from Apple. My download speeds immediately went back up to 315gb.

Is this normal for RAM to affect download speeds?

 

[glenthompson]

My wife’s iMac had problems with 3rd party ram mixed with Apple ram. Took out the 8gb Apple ram and just used the OWC 32gb. No problems since.

 

[Megabass]

Which memory modules did you install?

 

[dizmonk]

I had read that Timetic was pretty reliable but not so in my case.

 

[Fishrrman]

What happens if you remove the Apple RAM, and run with the 2 16gb DIMMs only?

(there seem to be numerous reports of 2020 iMacs in which the Apple factory RAM doesn't play well with 3rd-party RAM...)

 

[Megabass]

Have you installed timemec memory with apple memory or separately?
Based on the memory parameters, everything should work normally.

 

[dizmonk]

I had both the Apple ram installed and the Timetec. Everything else was fine but the one problem was download speed and internet browsing. I returned the Timetec. It was weird. I just never thought RAM would impact download speeds.

 

[Megabass]

There is a topic about memory and it indicates the features of the work of different memory modules together with Apple memory modules https://forums.macrumors.com/threads/memory-upgrade-compatibility-list-for-imac-2019-2020.2248911/
Very useful

 

[komatsu]

Interesting thread.

It's almost as if Apple don't want users upgrading their own systems....

 

[Megabass]

Well, apple is still not a charity
Therefore, you need to be glad that at least memory can be expanded yourself without paying space money to Apple, albeit with a little effort