1. DDR4-3200 CL16 or DDR4-3600 CL18 . Unless you wanna import G.Skill TridentZ Neo 32GB DDR4-3600 CL16

https://www.gskill.com/product/165/326/1562...32GTZN-Overview

2. You can't OC much on Ryzen platform. Most samples can go 4.3Ghz. Read again, 16 cores with 4.3Ghz! It requires serious cooling.

how much is he spending to import?
some high specs sticks are available here (more if you wanna manually OC)

5mm and Ryzen 4 will be late 2021 with DDR5.
Either late Q4 2021 or 1H 2022

no point waiting so long if you need a PC now.
I wait for you
Long overdue for platform upgrade.
My Intel CPU still got bridge, no lake

Now, everything no stock, but if come 2021 CNY, Rocket Lake out, your problems not solved, maybe I need to plan Intel build

Your money, your decision. There are plenty of reviews out. You might be able to find issues on google as well.
https://forums.tomshardware.com/threads/is-...s-fine.3779906/

Oh, and super long boot time.

Let's put it this way.

If you go with AM5 (i.e x670E), sure the platform would be supported until... perhaps say Zen 6, maybe even 7. That sounds like a long time, probably 5 years of upgrade options. Sounds nice on paper, but x670E is riddled with problems just like x370 was when it launched AM4. It was promised that x370 would support future AM4 based CPUs and it did, but not entirely.

Even the x370 boards that did finally support Zen 3 wasn't a smooth plug and play scenario, it required a lot of work arounds to get ahead of issues that shouldn't happen (Zen 1 CPUs had no USB drop outs, suddenly dropping in a Zen 3 CPU caused USB drop outs for example).

So we don't really know how AM5 would shape out in the future. AMD isn't your friend, they'd be more than incline to sell you x770 or x870 or whatever when the latest AM5-based Zen CPU gets released 5 years from now.

On the other hand LGA1700 is EOL now. But at least you can rest assured that z690 is a mostly stable platform and a 13900k will last you 3 years, easy. By then, you can decide again if AM5 has proven itself to be a stable platform or not to jump back into AMD.

You planning to upgrade every gen? If so, then nothing is actually "future proof". AMD may require you to get x770 too when Zen 5 comes around, just so the problems from x670 be eradicated. That's the typical AMD procedure, release something new, sweep old shit under the rug and hope people forget.

This is an old windows power plan problem.

Too many variables to list how this has happened but the main culprits are:

1) Installing a Zen 3 CPU over a Zen 2 CPU without reinstalling Windows. The Zen 3 CPU can be stuck using the Ryzen power plan that was only meant for Zen 2.

2) A windows update in 2020 and 2021 changed how the stock windows power plan works with Zen 3 CPUs, this could error out and the OS is still telling the CPU to use the non-updated power plan.

3) Mobo reporting wrong voltage due to EDC bug (AGESA 1.2.0.6), Windows wrongly sets the CPU in the wrong power state.

iCUE keeps your CPU power hungry. Disable it from startup using task manager.