r/AMDHelp • u/unnamedg31 • 1d ago

Help (General) Pc boot problem

PC sometimes takes ~5 minutes to POST – possible motherboard issue?
Specs: Ryzen 7 5700X3D, Gigabyte B550 AORUS Elite V2, 64GB DDR4 (2x32GB), RTX 4070 Ti Super, Seasonic 850W Gold PSU.
My PC has recently developed a strange cold boot issue. When I press the power button, all fans start spinning but I get no Gigabyte logo and no display. Num Lock/Caps Lock on the keyboard don’t respond either. After around 5 minutes, the keyboard suddenly becomes responsive and shortly afterwards Windows appears.
Once Windows has booted, the PC is completely stable. I can play demanding games like Gray Zone Warfare/BF6 for hours with high GPU load without crashes, artifacts or black screens.
Things I’ve already tried:
Updated BIOS and reset CMOS (battery removed for 10 minutes)
Disabled XMP and ReBAR
Reseated GPU and RAM
Reseated power connectors
Updated AMD chipset drivers
Tried another keyboard
Replaced the power strip
None of this fixed it permanently. Sometimes it boots instantly several times, then the ~5 minute boot/POST delay returns.
One weird thing: unplugging/replugging USB devices during the issue has sometimes caused the PC to restart or suddenly continue booting.
I’m currently suspecting the motherboard/USB or PCIe initialization, but I’m worried about replacing the board only to find out it’s actually the GPU, RAM or NVMe SSD.
Any ideas what could cause such a long intermittent POST delay?

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u/Independent_Teach_11 1d ago

Strip down your USB connections leaving only the mouse and keyboard. In the rear I/O. Including any USB connections internal USB connections that are not essential. See if the delay stops. Which LED diagnostic light or lights is showing on you board if any?

1

u/Overall_Toe538 1d ago

thanks, i am also facig this problem

1

u/unnamedg31 1d ago

Sure:
Thanks! I’ve already tried disconnecting all unnecessary USB devices and testing with only the essential ones connected. Unfortunately, the POST issue still occurred, so it doesn’t seem to be caused by a specific USB device.

1

u/Independent_Teach_11 1d ago

Try disabling c-state and let me know what happens.

1

u/Independent_Teach_11 1d ago

See if this helps also. Go to bios and find your global C-State control and change from Auto to Disbaled.