Which RAM should I use for my Threadripper build?

May 28, 2018
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Greetings!

I am currently planning my new main PC. It should be well equipped and futureproof for gaming, photo and video editing and programming including machine learning. Right now I have decided that I want to go for a Threadripper 1900X, because it has 8C/16T, decent clock speed out of the box, is overclockable and most importantly has a lot of PCIe lanes for fast storage. For a Mainboard I am currently considering the MSI X399 Gaming Pro Carbon AC for a number of reasons.

Now I have to pick RAM. For now, let's assume that price is irrelevant and that I'm willing to overclock everything. I'd prefer 16GB sticks, so I can upgrade to up to 128GB over time (Yes I can see myself needing that in the future).

  • With this MB+CPU combo I have the ability to use ECC which would be nice for extra stability, but generally ECC RAM appears to be significantly slower (lower clock+higher latency). Is it possible to come close to non-ECC speed with ECC RAM?
    Disregarding ECC, which memory will give me the best performance? Benchmarks appear to be scarce.
    Will there be a significant impact from using only dual channel as opposed to quad channel? (this says yes: https://www.youtube.com/watch?v=Rm80GABuCxo )
 
Solution
Mix and match RAM is a gamble at best. If you want 16GB DIMMs, then you should buy a four DIMM matched set. Yes it will be expensive, but it is guaranteed to work as a set. Any two DIMM set that you try to use with another two DIMM set has no guarantee of compatibility. If PCIe storage is important to you, and the cost of PCIe storage is not a limitation, then the extra cost for a 64GB set of RAM shouldn't be overbearing.

Personally, I would wait and see what the new Intel high-end desktop CPUs look like. They should be released soon.

kanewolf

Titan
Moderator
Mix and match RAM is a gamble at best. If you want 16GB DIMMs, then you should buy a four DIMM matched set. Yes it will be expensive, but it is guaranteed to work as a set. Any two DIMM set that you try to use with another two DIMM set has no guarantee of compatibility. If PCIe storage is important to you, and the cost of PCIe storage is not a limitation, then the extra cost for a 64GB set of RAM shouldn't be overbearing.

Personally, I would wait and see what the new Intel high-end desktop CPUs look like. They should be released soon.
 
Solution