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Crosshair X670E Hero - Long time to POST - Q-Code 15

Level 8

At boot, computer takes around 50 seconds with Q-Code 15 and Orange Q-LED, then proceeds to other parts of POST and boots normally. This is a new custom build. I read elsewhere this may be a buggy BIOS doing memory training on every boot. Already tried EXPO I, EXPO II, EXPO Tweak, and Auto. Nothing changes the outcome.


- Asus Crosshair X670E Hero, BIOS 1602

- AMD Ryzen 9 7950X3D

- Kingston 64GB 6000MHZ KF560C36BBEAK2-64 (is part of this motherboard Qualified Vendors List)

- INNO3D RTX 4090 (problem happens with either this GPU or the integrated GPU)

Any Thoughts? Thank you!


1.Clear the UEFI using the button on the rear IO

2. Remove the AC (power)

3. Place one memory module in slot A2

4. Reattach AC and retest

5. You may also want to try reseating the CPU and inspecting the socket. Ensure for even cooler mounting pressure 

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