The existing BIOS configurations lack full compatibility with the boot device.
The existing BIOS configurations lack full compatibility with the boot device.
I assembled the system using refurbished machines I've managed to acquire, leaving out the PSU and SSD which were brand new: an Intel i7 4770, an Asus Z87-C motherboard, 16 GB DDR3 memory at 1600MHz, an EVGA GTX 980ti SC 550 watt Corsair power supply (approximately six years old), and a Kingston 240GB SATA SSD. The issue began when the computer froze during Overwatch gameplay—screen glitched briefly, followed by a BSOD, then a black screen. After restarting, it crashed again shortly after. Upon checking temperatures in the game menu, the GPU was at 75% and CPU at 83%. I went to sleep feeling exhausted. The next day, I suspected overheating during gaming, so I removed the heat sink, cleaned it, replaced the thermal paste, and reinstalled the sink. Temperatures improved; CPU dropped to 45% and GPU to 60%. I played another session, but the crash occurred again. During a reboot, a BIOS warning appeared: "The current BIOS settings do not fully support the boot device." I tried adjusting settings in the BIOS, searching videos, and even unplugging components, but nothing resolved it. Eventually, I swapped the SATA port from port 1 to port 2 on the motherboard and changed the PSU cable, which resolved the issue. I watched three full replays, monitoring temperatures that stayed below 75%. I concluded it was likely a faulty PSU cable or SATA port. Now I’m unsure what else to check—could be the SSD, the PSU, or even the motherboard itself.