RAM for EPYC Rome (4Rx4 supported?)

[d33p]

Hi,

As 3200MHz got quite expensive I need to find some alternative RAM for my H11 SSL-NC / H12 SSL-I and Asus KRPA U16. Is 4Rx4 memory supported by EPYC or only 2Rx4? I cannot find a reliable answer to this. I was hoping to find some cheaper 2400/ 2666MHz 64GB DIMMs and most of them are 4Rx4.

Thanks!

 

[erock]

I have tested dozens of sticks @Newegg:MEM-DR416L-HL01-ER32 16GB Memory Compatible With Supermicro by NEMIX RAM
MEM-DR416L-HL01-ER32 16GB Memory Compatible With Supermicro by NEMIX RAM - Newegg.com

Quality is better than expected given the cost ($35). I have not encountered any memory issues and the vendor quickly replaces bad sticks. 1-2% of the sticks have not worked but the lifetime return/replacement policy still makes this a possibility worth consideration.

Crucial also offers comparable RAM at around $10 more per stick if you want want to go with more extensively tested brands.

 

[DaveLTX]

Hi,

As 3200MHz got quite expensive I need to find some alternative RAM for my H11 SSL-NC / H12 SSL-I and Asus KRPA U16. Is 4Rx4 memory supported by EPYC or only 2Rx4? I cannot find a reliable answer to this. I was hoping to find some cheaper 2400/ 2666MHz 64GB DIMMs and most of them are 4Rx4.

Thanks!

When EPYC 7002 first came out 64GB DIMMS were usually quad rank so you're fine. I have deployed a 7002 generation server with 8 x 64GB quad rank 3200MHz RDIMMs
While H11 rev 1 probably is quite tricky, Rev 2 probably should be fine

 

[NPS]

While H11 rev 1 probably is quite tricky, Rev 2 probably should be fine

Why do you think so? The memory tables in the manual explicitly list 4R DIMMs for Naples but only 2S2R for Rome. I am not shure yet what the exact difference is but it might be just exact opposite of what you said.