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ROG MAXIMUS Z790 APEX ENCORE 1503 Beta BIOS is unstable

Exist2Resist
Level 9

The latest beta 1503 BIOS update makes my system unstable. 

When I set my SA and IMC voltages manually the system fails to POST on 1503. 

When I use previous BIOS versions the system post fine.

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4 REPLIES 4

Lawrence
Level 7

This update is annoying,first, maybe you running at initial boot may be stable below or below 1.5 volt or offset around 1.42 whatever,

after you clear cmos or reinstall the update it maybe reevaluate your PC the worst it was go to 1.7v !? Yes, and I just change back my asus oc profile ,many setting will be ignore, I tried to the set AC load line at 0.025-0.03  (14900ks with 2X 420mm direct die custom cooling not exceeded 90 when R 15 R23 and many vf curve )when you try to stress this cpu,

motherboard get worse result afterwards you 3-4 times and killing your cpu finally I burned my windows .Even I change back to performance mode and reinstall also is cpu stopped code.

Now I moved this cpu to my pro art z790 WiFi when old bios no any change and no result changed at before result,lol

that mean just motherboard bios problem 

Ensure ETVB is enabled and don't use an old CMO file. ASUS Optimised  / SVID Behaviour Typical I don't see excessive voltage on my system (1.437v die sense). If still concerned, cap the maximum P-Core frequency or stick to Intel Default profiles.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Works perfectly fine with the 9933 BIOS that has the two ucode update someone posted in another thread.