AGESA 188.8.131.52 improved compatibility, but it is not perfect yet. As a user of Hynix made DDR4 3200, I can still only run them at 2800mhz.
i'll just tell ya straight up. if you want the perfect ram as it is all over internet. g.skill flare x 3200mhz sticks they also run 3467mhz different timing but same sticks. and yes they run it. f4-3200c14d-16gfx . you wont be unhappy..combinned with asus crosshair vi hero x370 .. if you go cheaper you may find unhappiness.. b350 boards expect 2 steps slower ram speeds... whatever you decide do not buy corsair 3000mhz sticks... worst
Is it expected to have "perfect" or almost perfect compatibility in future bios?
Could I run Hynix in b350 (gaming 3) board @ 2800 or 2933? If so, I'll go for it, because I'll pay the same price for 32gb as I would pay for 16gb b-die only to try to reach 3200.
edit: I just found out the ram sticks I was planning to buy seems to not be supported by the motherboards im planning to buy (taichi, gaming 3 and crosshair hero).
It's the F4-3200C16D-32GVR (ripjaws v, 16x2). Is it possible? lol
If so I have no option but to go for the Flare X, sticking with only 16gb (but a faster and more compatible ram)
you can try looking on QvL list for same sticks just change the 32 too 16 see if shows up. if it does they are compatible but the timings will be different if you can figure out what they would be. :/
also if you get the flare x 16gb kit you can call the distributor and request they give you 2 sets of kits that have the next serial number right beside the pack they pull out of the box to ensure they were stamped at factory on same machine and same lot. basically same as a 32gb kit.