x370 Taichi doesnt' boot

ket wrote: I take it you did check with the memory manufacturer that the sticks you have they verified to work on your board? When buying ECC memory this is the very first step you should take.

ram works correctly

6.4 is to support the XT cpus
i stopped at 6.2 as it works well hence why i recommended 6.2

i was very very very early in the que for my x370 taichi
from memory it came with 1.6
it has a sticker on the bios chip stating what version the factory flashed onto the board

whats troubling me is
the board is 4 years old now
why is it still on first bios ?
has it been lost on a shelf somewhere? is it a refurb?

not that buying a pre used board is bad
but as i alluded to in my first reply you must boot it to bios and find out what version it has on it (there are many mnay cases where the asrock distribution network has actually flashed later bios to earlier boards)
e.g. it may have been late in the network and got a update to ryzen gen2 e.g. bios version 4.40>

but yes the procedure for updating bios is any version BELOW 3.20
flash the bridge bios 3.30 then reboot the board set defaults and power down then reboot to bios and flash version 5.10 reboot to bios set defaults again power downand reboot to bios then flash v 6.20
which is most upto date ryzen 3xxx bios
i am using that one myself everything seems to work ok with good ram support etc
when flashing use just 1 stick of ram , dont allow the wife to start boiling a kettle or put any electric heaters on in house etc
you need to minimise any risk of a power failure while flashing bios
DO NOT ATTEMPT TO SET ANY XMP PROFILES FOR THE RAM WHEN FLASHING BIOS FILES !

Good catch Datonyb, I missed the RAM being ECC. If you still can't get the system
to post with the 1200 then you will need to try some standard RAM.

when you get the r1200
my advise is
one ram stick in slot a2
and fully reset the bios to default (eg remove the coin battery from the x370 for 30 mins)
boot to bios and find out EXACTLY what bios version you have before doing anything
depending on version of bios you may have to flash to a bridge bios circa version3xx AND THEN AGAIN a bridge bios version circa 5.xxx

DO NOT TRY AND SKIP THESE BRIDGE BIOS VERSIONS
they have important changes to make before flashing later bios versions

keep just one stick of ram in slot a2 while flashing bios versions it helps prevent issues updating bios and then the initial booting after bios flashing