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256GB RAM on x399 professional gaming motherboard

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dhtp View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dhtp Quote  Post ReplyReply Direct Link To This Post Topic: 256GB RAM on x399 professional gaming motherboard
    Posted: 26 Aug 2019 at 12:27pm
Hi,

I am interested in purchasing the x399 professional gaming motherboard:
https://www.asrock.com/mb/AMD/Fatal1ty%20X399%20Professional%20Gaming/index.asp

However, I want to check if it supports 256GB ram kits that utilize 32GB modules:
https://www.corsair.com/us/en/Categories/Products/Memory/vengeance-lpx-black/p/CMK256GX4M8A2400C16

Corsair claims that their modules are supported by the x399 platform, but I am not sure about this particular board. I understand that ASRock lists the RAM limit at 128GB, but that may have been due to the lack of 32GB modules when x399 and the motherboard came out.

Has anyone tried those new kits on this motherboard?

Thanks!

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dhtp View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dhtp Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2019 at 8:54am
In case anyone stumbles onto this post in the future, I contacted customer support and they replied with:

"MB does support 256GB, and confirm from our HQ."
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crion View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote crion Quote  Post ReplyReply Direct Link To This Post Posted: 18 Sep 2019 at 8:40pm
Yes, saw a 3.70 BIOS update for the Fatality X399 about 32GB support.

However the Memory QVL's are pretty empty on 32GB DIMM support. Buy branded good memory for AMD processors, preferably Samsung b-die if they exist in 32GB DIMM size. Atleast they have in 16GB DIMM size.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cx5 Quote  Post ReplyReply Direct Link To This Post Posted: 20 Sep 2019 at 5:31pm
Originally posted by dhtp dhtp wrote:

In case anyone stumbles onto this post in the future, I contacted customer support and they replied with:

"MB does support 256GB, and confirm from our HQ."


may be also tell their staff/HQ to update their memory QVL, https://www.asrock.com/mb/AMD/Fatal1ty%20X399%20Professional%20Gaming/index.asp#Memory

at this time to writing, no 32GB in the list.
X370Taichi 4x8GB HOF4CXLBS3600K17LD162C CX750M Optane900P TT_V71
3800x PoseidonAbsoluteZero4 BarrowPWM-17w pump4200rpm>bykski420x140x28
HISvega64 BS-AMRVEGA-PA FancierPWM-10w pump2700rpm>420x140x86
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Knasterhuis Quote  Post ReplyReply Direct Link To This Post Posted: 22 Apr 2020 at 11:14pm
Just wondering whether you got it working with 256 GB ram. Which processor are you using?
Thanks,
Knasterhuis
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hut Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2020 at 10:10am
Originally posted by dhtp dhtp wrote:

In case anyone stumbles onto this post in the future, I contacted customer support and they replied with:

"MB does support 256GB, and confirm from our HQ."

Were you able to make the system stable with CMK256GX4M8A2400C16 kit? I am having BSODs from time to time. Did you adjust any BIOS settings?
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