When posting a thread of troubleshooting nature, it's customary to include your full system's specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Straight after booting into GUI, is your memory usage at 100%? You might want to check and get back to us with the version of BIOS you're on at the moment.