Might want to list the specs to your old system. List the specs to it like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Include the age of the PSU. You might also want to elaborate on what you were trying to say about the BIOS. If you're trying to update the BIOS, make sure you're on the right BIOS for the motherboard you own. Using the wrong BIOS file can ruin your motherboard, permanently.