4 Things to Know About the ASRock DeskMini B660's Power Supply
The system uses a 120W (19V/6.32A) barrel connector power adapter. This external brick is the only way to power the DeskMini B660.
The barrel connector design prevents standard power supply swaps. You cannot replace it with a standard ATX or SFX power supply.
The 120W adapter supports CPUs with up to 65W TDP. This limits your processor choices to lower-power models.
You are stuck with the included brick. No aftermarket power supply upgrades are possible with this connector.