Which memory for the Supermicro H13SSL with an EPYC 9115?

One of my old servers just went down and now I am looking for an upgrade path. After a little search for options I am pretty set on:

  • Supermicro H13SSL-NT
  • AMD EPYC 9115

Sadly, I can’t find any memory for this setup. The supermicro recommendations look like unobtanium, at least here in Germany:


https://www.google.com/search?q=MEM-DR532MD-ER64

Are there any working setups with other Memory Modules? I asked the Supermicro support, but that wasn’t quite helpful. Part numbers are very appreciated :slight_smile:

Another quick question out of interest:
Will the Turin EPYCs only work with DDR5-6400?

No, you can use any memory up to 6400MT

Since you have a 16core CPU and your motherboard is a 12 channel, I would go slower RAM to save money, unless your programs are that memory bound
5600MT is a price/perf sweetspot for DDR5
4800MT for the cheapest RAM if you know for sure your programs do not care about RAM speeds

Keep in mind the more memory modules you have the faster your memory system will be, with bandwidth scaling roughly linearly with number of DIMMs, so if you populate all 12 slots you should have plenty of bandwidth for everything except the most exotic memory bound programs

Awesome, that is good news. Some time ago I had compatibility problems with an H12SSL and Kingston memory. Do you know any specific budget sticks, which are reported compatible?

I’ve always had good luck with Samsung memory

i can not give specific recommendations, but if you are not going to very high capacity, you should prefer single rank RDIMMs they may be a bit more expensive, but they more easily compatible with CPU’s memory controllers and motherboard slots

Samsung, Single Rank, 5600MT… makes this one the only one I can find right now :smiley:

Why is it so hard
a) for Supermicro to give a decent compatibility list?
b) to find anything in stock? After all, this should be the holy grail for modern systems, right?

And thank you all for the recommendations and hints!

When you find the answer please let us know

1 Like

I know you said you were in EU and therefore not much choice, but I don’t know how hard it is to get products from Amazon US into EU with respect to cost, tariffs, VAT, etc.

This is what I found easily. But still, populating all 12 memory slots is going to cost $1200 or EU equivalent.

I’ve noticed that the server board makers only do memory verifications with what they have in their labs for testing. I assume that the QA labs don’t have infinite budgets to purchase every possible memory solution from all vendors.

[EDIT] Here is the fleabay selection for the same part more or less. Better deal for > 1 quantities.

Or Micron part. Micron 16GB RAM ECC RDIMM 1Rx8 DDR5 PC5-4800B ECC REG Sever Memory DDR5-4800MHz | eBay?

Thank you! The US situation does seem better!
But with VAT, shipping, delay, … it is not really an option for me. Gonna keep looking however :slight_smile:

PS: I am basend in Germany

This stuff is expensive … I pulled 512Gb out of an ARM server that was being fixed and it was on the absolutely not compatible list for my home server (some supermicro board with 8 PCIe slots I forget) so it worked perfectly. Worry less provided you are ABSOLUTELY sure it’s the right type of memory. These days it’s generally more likely to be compatible (yes … I am that old).

The main advantage of that amount of memory is you can run you windows VM from RAM. I no longer have such a thing … so 16gb will be fine for a server. Don’t populate all the slots unless you’ve got a numa 1,10 system or something. It won’t add much value unless it’s your coding machine.

Oh … and funny story - I bought my ARM server from Germany!

1 Like

Don’t populate all the slots unless you’ve got a numa 1,10 system or something. It won’t add much value unless it’s your coding machine.

For the new EPYCs its different, it is actually a 12-Channel memory interface, so full potential only comes when populating all the slots.

I actually do not need thaaat much memory, I think 192GB (12x16GB) is fine already. If I can get decent prices, I will go up to 384GB (12x32GB).

Worry less provided you are ABSOLUTELY sure it’s the right type of memory. These days it’s generally more likely to be compatible (yes … I am that old).

I guess that is lucky, my experience with a previous board (H12SSL) was very different. Had a couple of good (and seemingly compatible) Kingston modules laying around and nothing got me to POST. Support just told me, that I should stick to different brands. Then I ordered from one of those brands and it still did not POST. Ended up buying the exact stick mentioned in the compatibility list from Supermicro, which cost around +30% per module compared to similar modules.

Now I am willing to pay that price, but I can’t find the listed

MEM-DR532MD-ER64

modules anywhere on the German market. Even the 5600MT and similar modules seem hard to get.

So yeah, looking for real expertise with exactly that board. I’d love to hear some SKU from people who have the board running in production :slight_smile: