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X570 Taichi - daisy chain or T topology DIMM?

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foxx1337 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote foxx1337 Quote  Post ReplyReply Direct Link To This Post Topic: X570 Taichi - daisy chain or T topology DIMM?
    Posted: 14 Oct 2019 at 10:11pm
The general consensus, based on pre-release pictures from around June is that the Taichi connects the DIMM slots in parallel. See Buildzoid's analysis:
https://www.youtube.com/watch?v=OUtvsAmD3Ws#t=21m13s

I'm looking at the high quality pic from overclock.net:
https://www.overclock.net/forum/11-amd-motherboards/1730162-official-asrock-x570-overclocking-support-thread.html
and it's really unclear to me at this point whether we're dealing with a serial or parallel configuration.

Furthermore, the manual recommending pairs A2, B2 for 2 DIMMs (like most other motherboards out there) makes me think this is a daisy chain configuration (series). Any info on this?
Ryzen 3900X, Taichi X570
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray62 Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 4:02am
The Asrock X570 Taichi is known as one of the very few boards with T topology, like the X370 and X470 Taichi. The pictures doesn't show all.
And the QVL shows some 3600MHz RAM DS modules for 4 DIMM configurations.
I think, the "manual recommending pairs A2, B2 for 2 DIMMs" is the standard print in all manuals.

Here is a list with infos for a lot of boards:
https://docs.google.com/spreadsheets/d/1wmsTYK9Z3-jUX5LGRoFnsZYZiW1pfiDZnKCjaXyzd1o/htmlview?sle=true#gid=2112472504

Hmm, it seems that all Asrock X570 boards have T top.
And it also seems, that the topology is not so important for Zen2.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote shmerl Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 1:51pm
I'm using 4 sticks successfully (at 3600 MHz) with X570 Taichi. Specifically this set:

http://www.gskill.com/specification/165/168/1536288991/F4-3600C16Q-32GTZKK-Specification
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Post Options Post Options   Thanks (0) Thanks(0)   Quote foxx1337 Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 5:56pm
That Google spreadsheet is based on Buildzoid's analysis I linked before. Still not really convinced, but quad ranked @ 3600 MHz seems a more reasonable argument.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John29 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Oct 2019 at 5:38pm
I'm using 4 sticks successfully (at 3600 MHz) with XX70 Taichi
TeamGroup Dark Pro "8Pack Edition" 4x8 32GB PC4-25600C14 3200 running at 3600 at 1.375



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Post Options Post Options   Thanks (0) Thanks(0)   Quote foxx1337 Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 2019 at 8:20pm
Thanks. Still doesn't mean much. Buildzoid successfully overclocked different 4x8 or 2x8+2x16 configurations on various "known" daisy chain motherboards from MSI or Gigabyte.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote foxx1337 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Nov 2019 at 6:55pm
Buildzoid took his retail Taichi apart and it's a daisy chain config:

https://www.youtube.com/channel/UCrwObTfqv8u1KO7Fgk-FXHQ/community?lb=UgwjG8OxnKAGLMUVyQB4AaABCQ


https://i.imgur.com/v6LLuTf.png
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray62 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Nov 2019 at 7:58pm
So just the ES board he used in his first review had T-Top.
Could be seen as an indicator, that the topology is not so important for Zen2.

Regarding the PCB layout, a better placement for the chipset and the USB 3.2 Gen1 Header would give a higher benefit as T-Top anyway...

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