Specs:
CPU: i5-4460
MOBO: Asus H81M Plus
RAM: Kingston 2 x 8gb DDR3
HDD: WD 1TB
GPU: Gigabyte Radeon RX570
PSU: Corsair RM650x
OS: Windows 10
Was using onboard graphics before, bought a new GPU and PSU. Installed them both. PC works fine without GPU. With the GPU connected, makes 1 long beep...