Question How bad is the DDR5 compatibility problem today? I have an 7700x + X670E-A and I've just cancelled my Vengeance DDR5 6400 C32 order. I'm lost.

[KuroMath]

So, I'm building a new computer and I ordered a Rog Strix X670E-A and chose the Corsair Vengeance DDR5 6400 C32 (CMH32GX5M2B6400C32) but noticed it wasnt included in the MB support list (ROG STRIX X670E-A GAMING WIFI | ROG STRIX X670E-A GAMING WIFI | Gaming Motherboards｜ROG - Republic of Gamers｜ROG Global (asus.com) ) , so I canceled my order and am currently waiting for the cancel confirmation so I can order the next one.
I am considering the F5-6000J3636F16GX2-TZ5NR, but now I'm worried because it uses Samsung chips and apparently some people had stability issues. I can't find any of the Corsair RAMs supported by the MB (6000mhz and above) for sale in Brazil.
Any suggestions?
I'm mainly searching Ram through mercadolivre.com.br, kabum.com.br and amazon.com.br. My budget is roughly up to 3000R$ (my first purchased RAM that I canceled is 1700 and the one I'm planning to purchase (the one using samsung chip) is 2200R$.

I also asked the same thing on reddit: I've ordered a Corsair Vengeance DDR5 6400 C32 RAM, but the page only mentions intel chipset and optimized for intel, with no mention of AMD. Should I cancel the purchase and buy another ram? : buildapc (reddit.com)

 

[bill001g]

Its too bad that is not on the list since it is cheaper. AMD is a lot more picky about memory and 6400 with a CL32 is fast. The 6000 memory you list is a lot slower it would need a cl30 to be similar.

Maybe watch this about 1/2 way they talk about the problems with AMD but they are getting 6400 memory to run on their board. What I would wonder is can you buy the first kit and manually turn the speeds down,unfortunately there is no way to know.

They seem to say low cas 5600 will perform as well as some of the faster kits with higher cas. Maybe you can find some 5600.

View: https://www.youtube.com/watch?v=b-WFetQjifc

 

[KuroMath]

Its too bad that is not on the list since it is cheaper. AMD is a lot more picky about memory and 6400 with a CL32 is fast. The 6000 memory you list is a lot slower it would need a cl30 to be similar.

Maybe watch this about 1/2 way they talk about the problems with AMD but they are getting 6400 memory to run on their board. What I would wonder is can you buy the first kit and manually turn the speeds down,unfortunately there is no way to know.

They seem to say low cas 5600 will perform as well as some of the faster kits with higher cas. Maybe you can find some 5600.

View: https://www.youtube.com/watch?v=b-WFetQjifc

The F5-6400J3239G16GX2-TZ5RK is available for purchase and is a 6400 + CL32 BUT it is 33% more expensive (2800R$) and I fear it may have compatibility issues for being 6400mhz. You think it is safe, since it is on the MB supported list, and overall worth the higher price?
And it is Intel XMP certified, not EXPO.

 

[bill001g]

Watch the video it is not likely worth the extra cost to buy real high end memory seem to the be message.

 

[Blutdog]

I can't even get 32 GB 6000 MHz DDR5 to post on my x670e Tuf Gaming plus wifi.
CAS 38 nor the CAS 30. They both will post with no issues when not having DOCP enabled. The T-Force Delta CAS 38 is on the verified list and the T-Force Delta Cas 30 isn't on the verified list. Bios version 0821 nor the latest version of 1222 released yesterday makes any difference.

 

[vladakv]

I can't even get 32 GB 6000 MHz DDR5 to post on my x670e Tuf Gaming plus wifi.
CAS 38 nor the CAS 30. They both will post with no issues when not having DOCP enabled. The T-Force Delta CAS 38 is on the verified list and the T-Force Delta Cas 30 isn't on the verified list. Bios version 0821 nor the latest version of 1222 released yesterday makes any difference.

Look, I bought ram for ryzen 7 7700x, 2x8Gb cl 40, 6000MHz with DOCP. It couldnt get 6000 at all. Maximum was 5400.
I rma it and got 2x16Gb with amd expo certified. Now its 100% stable at maximum speed - 6000MHz.

Interesting, both ram I bough are on the motherboard compatibility list.

 

[geofelt]

The motherboard ram QVL list tells which kits have been tested and found to work.
It may have not been updated.
If you find a kit of interest, go to the vendor web site and access their ram compatibility app for your motherboard.

And, new motherboards will have a stream of bios updates, usually including ram compatibility fixes. See that you are current.