If you have a 4 DIMM Z690/Z790, there’s no real point in spending money on A-die just to not be able to get past 7200 Mt/s. I got frustrated with time/money investment and decided to just listen to Buildzoid and stick with M-die where you can get much tighter sub-timings.
There’s actually venting on the DIMMs which is cool, I’m going to throw a fan on them and see how hard I can push these! So much cheaper than the binned A-die kits they sell.