x370 Taichi & Corsair

well i found the kit i mentioned in germany and a bit cheaper than the slower kit you found

http://www.warehouse2.de/de/arbeitsspeicher/ddr4/ddr4-3000/32gb-ddr4-3200-kit-g-skill-f4-3200c14d-32gtz-trident-z

the trouble your facing is 32gb is expensive relatively for any brand 32gb and add to that the speed puts quite a premium on top 2400/2666 is a lot cheaper

here is the list of autherised gskill sellers in germany
https://www.gskill.com/en/wheretobuy/list/de

Wow! thanks Datonyb for the great help, I was about to give up on 32GB and get 16GB until the rams get more mature.
Seems I have some shopping later today, Thanks again man!

I'm glad you guys were having this conversation, because it helped me realize it was time to throw in the towel on trying to get the Corsair Vengeance LED 32GB (4x8) kit I've been wrestling with to work.

I've got the Taichi X370 and that kit, and it started off solid enough. 3DMark worked, along with a few other stress tests and benchmarks - all green, all excellent. But not long into it, I started having real instability problems - OS would hard lock, POST sequence would get slow and reboot several times in a session, etc.

I've pulled out everything except the basics and tried about a bajillion different combinations of modules and slots, using ASRock and others' recommendations, and all I can get out of it are D2 and 55 board codes (memory initialization, and MAYBE PCH initialization, based on my searching). Every once in a blue moon, after reseating, clearing, etc., it'd get back into the UEFI, where it'd insist my RAM (the one or two modules max I could get it to POST with) was DDR4-2133.

I'm returning the kit to Amazon and am going to try the G.Skill FlareX 2x16 32GB kit. I'll let you guys know how/if system stability improves. Thanks for all the great links and info, though - I didn't expect this kind of info to be quite so hard to nail down. :(