DDR4 2933Mhz memory with intel 10th CPU in iMac 2020 ?

[marcobb0312]

Can iMac 2020 support the DDR4 2933Mhz memory with intel 10th CPU ?

If not, why ?

Cheers 🤗

 

[casperes1996]

If you send me some, I'll gladly test it - Joking aside, good question. The CPU should be able to handle it at least

 

[marcobb0312]

wait other people to test, lol

 

[pldelisle]

Someone is supposed to test this upon arrival of his iMac and report here : Memory upgrade compatibility list for iMac 2019-2020

 

[Cheery]

I bought SK_hynix_2993MHz ram and it will arrived with my new iMac tomorrow. Let's check out!

 

[pldelisle]

I bought SK_hynix_2993MHz ram and it will arrived with my new iMac tomorrow. Let's check out!

Where did you buy it ? Which model ?

 

[Cheery]

Bad news.
With this ram model, it down to 2666MHz. Maybe the motherboard limit

 

[RyanXM]

@Cheery Did you attempt a PRAM reset to see if that changed anything? It’s odd that System Info is showing the part number for the 2666 variant of that RAM...

 

[Cheery]

@Cheery Did you attempt a PRAM reset to see if that changed anything? It’s odd that System Info is showing the part number for the 2666 variant of that RAM...

have not

 

[jacklivehere]

have not

If possible, can you do quick check?

 

[Cheery]

@Cheery Did you attempt a PRAM reset to see if that changed anything? It’s odd that System Info is showing the part number for the 2666 variant of that RAM...

I think it's not this reason. Maybe sharing the same board with i5 processor cause that, which can not support above 2666MHz. Sry I cant check it anymore

 

[ekwipt]

that sucks @Cheery good idea for trying!

 

[casperes1996]

@Cheery Did you attempt a PRAM reset to see if that changed anything? It’s odd that System Info is showing the part number for the 2666 variant of that RAM...

Could also be simple firmware so a slim chance it could get updated in the future

 

[RyanXM]

My 10-core will be here on Wednesday and I have plenty of RAM to test in it so we shall see if Apple firmware locked it for now...time will tell.

 

[pldelisle]

Could also be simple firmware so a slim chance it could get updated in the future

You have high expectations ... lol

 

[TwoH]

Aren't your part numbers different for those pictures?

 

[RyanXM]

Aren't your part numbers different for those pictures?

This was my observation as well. The System Info screenshot shows the part number as "HMA81GS6CJR8N-VK" vs. the "HMA81GS6DJR8N-WM" of the actual modules. I will have my 10-core on Wednesday and I have 4 different brands with 3 different speeds to test.

EDIT: The serial numbers of the modules do match what is in the System Info screenshot, which makes this all the more odd.

 

[casperes1996]

You have high expectations ... lol

Hey, never said I expected it. - Possible, but unlikely :/ - Though in all fairness that minor difference in RAM frequency doesn't matter all that much in real terms. And you can always play with timings instead I guess