Old rig not booting without GPU

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Published on ● Video Link: https://www.youtube.com/watch?v=eNkocsj039A



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UserBenchmark link: http://www.userbenchmark.com/UserRun/842391

OS: Windows 10 64bit
CPU: Intel Core i3-2100 - 61.3%
RAM: Kingston 99U5471-056.A00LF 99U5471-011.A01LF 10GB - 34.7%
MBD: Asus P8H61-M LE/USB3
PSU: Gigabyte 550W


Finally got a new awesome rig and moved my current 660TI card to the new rig. Right after that, the old rig always restarts while trying to boot into everything (windows 7,8,10, recovery media like cd and pendrive). It happens when it's booting into the OS or media I connected (a few seconds after, the boot from sd card phase). I confirmed that this is NOT related to my hard disk or my OS like drivers as it still happens even after I disconnected all the HDD.

As soon as I plug a GPU into it, everything just works. It sounds like a bad joke but my old rig just misses having a GPU connected to it? Will add screenshots and video soon when I can

What I've tried:
Isolating individually all other parts like RAM, Hard disk, OS (drivers)
Tweaking every settings in the BIOS including graphics settings like force set iGPU as main graphics adapater
Updating to the latest BIOS
Resetting BIOS by doing it in BIOS menu and force reset by taking out CMOS
Inspecting the actual motherboard and found no issues

What I think I have to do:
Get a new cheap mobo since I plan to use this old rig as a server







Tags:
Asus
P8H61
P8H61-MLE
P8H61-MLE/USB3
boot failure
without GPU
no GPU
without graphics card
with no graphics card
GPU
graphic card
boot
issue
BIOS
Windows 10