Thanks guys, for the discussion.
I'm having the same problem, although I haven't done nearly as much testing as you guys.
I have the Asus Maximums z790 Hero with four sticks of the following RAM:
I would like to add I was running the setup posted by encrypt1d (see below) on BOIS 0813 with ME version 22.214.171.1240 and it was rock solid UNTILL I updated my BOIS to 0904 and ME version to 126.96.36.1994. It turned into a real POS and would BSOD within 20 minutes no matter what settings I tried, even with everything set to auto.
I've rolled back to BIOS 0813 but can't roll back the ME version and it's better than it was on 0904 but now with 4 DIMMS and any settings I've tried I get BSOD and freezes that require a full power down randomly multiple times a day. Since I use my PC for work also I've been forced to pull the DIMMS from slot A1 and B1 for now, so disappointing.
Ran 128GB / 4 DIMMS perfect with the below setting on BIOS 0813 and ME version 188.8.131.520
I'm running a Maximums Hero z790, 13900K, ASUS TUF-RTX4090 OC Edition, and 4 DIMMS of Dominator Platinum DDR5 5600MHz C40 (CMT64GX5M2B5600C40) well currently I'm only running 2 DIMMS.
I returned my brand-new PC today Asus Rog Maximus Z790 Hero ATX DDR5 Motherboard, LGA1700 Intel 13th Gen, Z790 Chipset, Kingston Fury Beast RGB 64GB ( 2 x 32 ) DDR5 Desktop Memory, 5600MT/s Speed, CL40 Cas Latency, 1.25V Voltage, 288 Pin, Dual Channel Kit.
I have tried everything but still get BSOD; the best setting got me down to one error on memtest86, but it is still one too many for stability. I am not trying to overclock or anything spectacular simply want the product / assembled PC to work without BSOD. Is that too much to ask? I am no computer engineer, but I can help myself a bit, I simply can’t imagine how frustrated anyone is paying rather a high-end price to get something that does not work OOTB. ASUS – this is how Intel managed to completely lose share price and equity value. Your brand will get irreparable damage consumers are not stupid and they will hold you to fix the issues. Please do something !!!