Hello, i was having EXPO issues on my X870-F.
RAM kit is 2x16GB G.Skill Flare X5 6000MHz 30-38-38 (Hynix A-Die), RAM is on QVL list (Trident Z5 with same timings is listed which has same PCB), motherboard is also listed on G.Skill's QVL list. I have Ryzen 7 7700 for the CPU. Running single gen4 M2 on M2_1 slot which does not have lane sharing.
Enabling EXPO I, II or Tweaked results with system failing to post (DRAM debug led lights up, system shuts down after couple minutes and boots as safe mode). I was on BIOS 0706, tried flashing 0606 but it made no difference on results.
I've discovered a strange workaround, first of all i'm still on 0606, so i don't know if this will work on 0706. I cleared CMOS with CMOS reset button, i loaded optimized defaults when it booted to BIOS, disabled fast boot on boot section (don't know if this helps). I turned the EXPO on AMD OC sub-menu, not the Asus Tuning (AI Tweaker), did a save and reboot. After some memory training (around 5 min if i remember correctly) system booted successfully.
I also tried my custom timings and voltages, they seem to boot as well, but didn't test the stability yet.
I suspected there might be a hardware issue first, but this workaround basically means something is wrong on BIOS, i don't know what went wrong on Asus Tuning section (AI Tweaker).
Can someone also try this method to see if it helps?
