Adding another 64Gb Ram to machine with 64GB ram...

[Luke]

Is there any issue in just buying an additional 64GB ram of the same brand and type and adding it to the remaining 4 DDR4 slots?
the machine is a AMD TR 2950X/64GB Vengance LPX 3200/Gigabyte X399 AORUS XTREME

I've heard in the past that you should buy all the RAM at the same time...?

Any help is much appreciated.

[Luke]

thanks mate, much appreciated. I always thought it was a bit odd... 👍

[Juraj]

I am on verge of barely tolerating the drivel from Burnin.
Removed because it's wrong advice, and neither do I find it funny.

Short answer: It should work.

Long answer: It should, but might not in specific cases. You have to buy identical codename, not just type, to make sure it's identical revision. So if it's called Corsair Vengeance RGB 3000 CL15 but the full code is 12456ABCD001, you have to buy that same code to be guaranteed to have identical kit. Buy it based on that full product code, nothing else.
Because otherwise, what happens between revisions, is that different manufacturer will provide the dies (which only come from Samsung, Micron, or Hynix), and they don't have to play along at their designated rating (XMP profile). It will still work, but if it's 3000 CL15 for example, it may not be stable at such.

Memory compatibility didn't use to be a problem at all, it did become though with AMD Zen architecture which uses memory to much higher degree and has far more sensitive memory controller (this was worst for X399, it's much better for 3rd gen TRX40 right now).

Also, seeing what kit you have, count with possibility that 128 GB for 2950X might not work at 3200 CL16. In that case, enable the XMP profile, and override the speed to 2933. Then you're good to go.

[aaouviz]

I am on verge of barely tolerating the drivel from Burnin.

I did not see it, but I agree!

[burnin]

:| Note:

I wrote "same".

And it's burnin.

[Luke]

I am on verge of barely tolerating the drivel from Burnin.
Removed because it's wrong advice, and neither do I find it funny.

Short answer: It should work.

Long answer: It should, but might not in specific cases. You have to buy identical codename, not just type, to make sure it's identical revision. So if it's called Corsair Vengeance RGB 3000 CL15 but the full code is 12456ABCD001, you have to buy that same code to be guaranteed to have identical kit. Buy it based on that full product code, nothing else.
Because otherwise, what happens between revisions, is that different manufacturer will provide the dies (which only come from Samsung, Micron, or Hynix), and they don't have to play along at their designated rating (XMP profile). It will still work, but if it's 3000 CL15 for example, it may not be stable at such.

Memory compatibility didn't use to be a problem at all, it did become though with AMD Zen architecture which uses memory to much higher degree and has far more sensitive memory controller (this was worst for X399, it's much better for 3rd gen TRX40 right now).

Also, seeing what kit you have, count with possibility that 128 GB for 2950X might not work at 3200 CL16. In that case, enable the XMP profile, and override the speed to 2933. Then you're good to go.

Okay thanks mate, I bought the same product code RAM being CMK64GX4M4B3200C16. I've installed it and its showing now as 128...
how would I test it to make sure its good/stable etc...?

[Juraj]

https://www.techpowerup.com/memtest64/

Some people run it days ;- ) Also if Aida64 and Prime95 don't crash your PC (Prime has memory focused run), that's also good.

That's after enabling XMP profile and lowering the speed from 3200 to 2933 (This is the highest stable speed for 128 GB on X399, esp. low tier memory like Vengeance 3200/16)

[Luke]

https://www.techpowerup.com/memtest64/

Some people run it days ;- ) Also if Aida64 and Prime95 don't crash your PC (Prime has memory focused run), that's also good.

That's after enabling XMP profile and lowering the speed from 3200 to 2933 (This is the highest stable speed for 128 GB on X399, esp. low tier memory like Vengeance 3200/16)

Thanks mate, I'll give it a crack ;)