GIGABYTE GP-P450B 450 W ATX 80 Plus Bronze power supply

Power delivery for entry builds

The GIGABYTE GP-P450B is a 450 W ATX 12V v2.31 unit built for budget desktops and office systems that need reliable power without modular cables. Its single +12V rail rated at 36 A gives stable current to modern CPUs and mid-range graphics cards. The non-modular design keeps cost low while the flat black cables reduce clutter inside compact cases. This supply fits standard ATX bays with a 140 mm depth.

Thermals and acoustics

A 120 mm hydraulic-bearing fan spins under automatic load detection to balance airflow and noise. The 80 PLUS Bronze rating guarantees 85% efficiency at 50% load, which cuts waste heat and lets the fan run slower in typical use. Hold-up time is rated at 16 ms minimum and the power-good signal arrives within 100 to 500 ms for clean start-ups. Protections include OVP, OPP, SCP, UVP, OCP and OTP.

Cable layout and practical impact

Fixed flat cables include a 20+4-pin main connector, two 6+2-pin PCIe leads and three SATA power plugs. The flat ribbon style eases routing and improves case airflow compared with round bundles. No PFC circuit is present so input current draws more harmonics but the wide 100 to 240 V range covers global mains without a switch. The hydraulic bearing is rated for more than four years of continuous operation.