[awaybreaktoday]

Really? Newest if F5E.

Can you try F5C - http://download.gigabyte.us/FileList/BIOS/mb_bios_x570-aorus-master_f5c.zip

I have 4x8GB @ 4000 XMP no problem. Worked on all the F5x BIOS I have tried.

Whats the model number of the memory kit for the above?

 

[awaybreaktoday]

I just stuck the 5900x in flashed latest bios on my x570 ultra. I set xmp and tried going for my stock ddr4-4000 speeds but wouldn't boot but 1900/3800 booted no issues which is nice since my 3900x would not be stable on anything over 3600.

I will probably try and tweak timings later on when final bios version is out.

View attachment 2465084

Ok you have done all this tuning on your system but yet your CPUz bench numbers are lower than my stock settings? Why is that? I am also running 4x16GB Ram sticks 3600 16-18-18-36...
Why is mine faster than yours?

 

[awaybreaktoday]

J bios is here, replace letter with version you want

https://download.gigabyte.com/FileList/BIOS/mb_bios_x570-aorus-master_f31j.zip

 

[awaybreaktoday]

I have had to go back to J, K and L too many issues........