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After turning on XMP, Q-Code 40 will appear when booting

Kagami119
Level 7

After entering the Bios and turning on XMP, shut down the computer, turn off the socket power, turn on the socket power after 5 seconds, and press the power button. The motherboard will run for 1 second and then stop immediately for 3-5 seconds, The motherboard will continue to run, the PC will be fully turned on, and the Q-code will display code 40.

If, after turning on XMP, the computer is shut down, without turning off the socket power, and the PC is fully turned on, Q-code 40. Everything is normal.

Close XMP, shut down the computer, turn off the socket power, turn on the socket power after 5 seconds, press the power button, the motherboard runs, the PC is fully turned on, Q-code A0. Everything is normal.

Please tell me how to solve the problem that the motherboard will automatically stop for 3-5 seconds when the power is turned off and then turned on again.

Asus ROG Maximus XI Hero (Wi-Fi),  Kingston HyperX KHX3200C16D4/8GX, OctalCore Intel Core i9-9900KF, 4800 MHz (48 x 100) , NVIDIA GeForce GTX 1080, Microsoft Windows 10 Pro,

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3 REPLIES 3

Silent_Scone
Super Moderator

Hello,

CODE 40 indicates awaking from S3 Resume sleep states, and is normal functionality. Power cycles when changing certain petametres is also normal especially when it pertains to memory training, as some controllers require this.

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

thank you for your reply.
The main problem is that after a power outage (turn off the power to the socket), and then turn it on again, the motherboard will run for about 1 second and then shut down for 3 to 5 seconds. Does anyone know how to solve this problem?

As above.

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