How to identify issue with computer?

Thanks for sharing the details! Try to disable XMP / DOCP completely (very common cause)

Even if RAM passes tests, XMP can still cause boot-looping and no-POST issues.

What to do

Enter BIOS

Disable XMP / DOCP

Manually set:

• RAM speed to JEDEC default (2133 or 2400 MHz)
• Voltage to 1.20 V

Save and reboot

Unstable memory training often causes:

• Multiple boot attempts
• Debug LEDs cycling
• No display, but fans/GPU lighting up

This is especially common after BIOS updates or power fluctuations.

See if this helps. If you need further assistance just let me know.

Best regards,

Kimberly

To identify the issue with your computer, you can follow several troubleshooting steps based on the symptoms you've described:

1. Check Boot Process: Since your computer takes multiple tries to boot, it may be stuck in the boot process. Understanding the phases of the boot process can help you identify where the issue lies. The boot process consists of several phases, including PreBoot, Windows Boot Manager, and Windows OS Loader. If the system hangs at any of these phases, it could indicate a problem with the BIOS, boot configuration, or hardware.
2. Inspect Hardware Connections: Ensure that all hardware components are properly connected. This includes checking the motherboard connections, GPU seating, and power supply connections. Loose connections can cause boot issues and hardware malfunctions.
3. Run Diagnostics: Use built-in diagnostic tools or third-party software to check for hardware issues. If your motherboard has built-in diagnostics, use those to check for errors. Additionally, consider running the Windows Memory Diagnostic tool again to ensure there are no intermittent memory issues.
4. Check for Overheating: Although you mentioned that temperatures seem fine, ensure that your cooling system is functioning correctly. Overheating can cause the system to shut down unexpectedly.
5. Update BIOS/Firmware: An outdated BIOS or firmware can lead to compatibility issues. Check with your motherboard manufacturer for any updates that might resolve boot problems.
6. Safe Mode: Booting into Safe Mode can help you determine if the issue is related to drivers or software. If the computer boots successfully in Safe Mode, it may indicate a problem with third-party drivers or software.
7. Power Supply Issues: Since the computer sometimes turns off completely, consider testing the power supply. An inadequate or failing power supply can lead to instability during high loads such as gaming.
8. Check for Error Codes: If your motherboard has error lights, refer to the motherboard manual to interpret these codes. They can provide specific information about what might be failing.

If these steps do not resolve the issue, it may be beneficial to consult with a professional technician for further diagnosis.

References:

• Advanced troubleshooting for Windows boot problems
• Advanced troubleshooting for Windows start-up issues

The single most telling test (do this first)

Remove the GPU entirely

Use motherboard video output

Game shutdowns won’t apply here — just boot stability

Results interpretation:

• Boots cleanly every time → PSU PCIe rail or GPU power
• Still needs multiple boots → motherboard VRM or CPU power delivery

This test isolates 50% of the problem space immediately.

Given the testing you've already done the power supply is a real possibility. Unfortunately, there is no good way to eliminate it except by substitution.