Threadripper 128GB Memory support Confusing?

[PepeTheGodUK]

I just finished my Threadripper 1950X + 1080ti hardline watercooled build, my first time using water cooling!

Im looking at filling all 8 RAM slots with 16GB sticks, however mobo specs, CPU specs are getting confusing.

Threadripper ive heard supports up to 3600Mhz speed RAM, however on the motherboard page i believe i saw that it only supports 2400Mhz

when all slots filled to 128GB.

 

Im confused, what speed RAM should i buy? 2400Mhz, 3600Mhz or higher??

 

-Motherboard: Asus Prime X399-A

 

First time on these forums, would really appreciate if someone knows more about this, thanks!

[Coaxialgamer]

Well the IMC might be a bit weak for 8 slots , or maybe ASUS is just being conservative

Edit: just checked their website , the board does indeed support up to 3600 with OC . I don't quite know where you are getting the 2400 max spec . It even lists 2666 as within spec

[PepeTheGodUK]

5 minutes ago, Coaxialgamer said:

Well the IMC might be a bit weak for 8 slots , or maybe ASUS is just being conservative

Edit: just checked their website , the board does indeed support up to 3600 with OC . I don't quite know where you are getting the 2400 max spec . It even lists 2666 as within spec

Ok thanks, im sure i saw somewhere of it having a limitation? Hopefully not, i will try and go for the 16GB 3600Mhz X8 then!

[Coaxialgamer]

1 minute ago, PepeTheGodUK said:

Ok thanks, im sure i saw somewhere of it having a limitation? Hopefully not, i will try and go for the 16GB 3600Mhz X8 then!

in theory it should work . Although do note that 3600 is technically listed as OC , so not within spec (>2666 mhz ) . It might not work because of this , espeically given the extra IMC strain . Although 3200 should be perfectly doable

[PepeTheGodUK]

Ok ok, would i be safer buying slower speed RAM and overclocking it manually on the mobo, or buying 3600Mhz and seeing how it runs? Like would highly overclocked RAM cause the system to not boot potentially?

 

Thinking of buying pairs of 2X16GB packs to spread the cost each month.

[Coaxialgamer]

3 minutes ago, PepeTheGodUK said:

Ok ok, would i be safer buying slower speed RAM and overclocking it manually on the mobo, or buying 3600Mhz and seeing how it runs? Like would highly overclocked RAM cause the system to not boot potentially?

 

Thinking of buying pairs of 2X16GB packs to spread the cost each month.

That's a difficult question honestly , and it's mostly up to the type of memory dies being used . Samsung produces what is called B-die memory which performs very well with threadripper . If you get your hands on some sticks using those dies , you shouldn't have much of an issue.

 

Problem is that B-die is only used in high end memory kits . 3200mhz gets the low end B-die ( which you should be able to get 3600mhz OC ) .

Other 3200mhz kits use hynix or micron dies which don't play that well with ryzen .

 

As long as you can get a B-die kit , then 3600 mhz might be doable with 3200mhz ram .

I don't recommend getting rated 3600 mhz ram given the price mark-up and the fact it's not even guaranteed to work

[PepeTheGodUK]

4 minutes ago, Coaxialgamer said:

That's a difficult question honestly , and it's mostly up to the type of memory dies being used . Samsung produces what is called B-die memory which performs very well with threadripper . If you get your hands on some sticks using those dies , you shouldn't have much of an issue.

 

Problem is that B-die is only used in high end memory kits . 3200mhz gets the low end B-die ( which you should be able to get 3600mhz OC ) .

Other 3200mhz kits use hynix or micron dies which don't play that well with ryzen .

 

As long as you can get a B-die kit , then 3600 mhz might be doable with 3200mhz ram .

I don't recommend getting rated 3600 mhz ram given the price mark-up and the fact it's not even guaranteed to work

 

Excellent advice, i wasn't event aware of that, thanks for the help.

I'll look out for that B-die RAM with 3200Mhz.

[Guest]

I am running 8 sticks of 3200 @ 2933. Getting to 3600 w/ 8 sticks is highly unlikely.