Power supply unit Seasonic CORE GC-650 ATX 3.1 650 W 24-pin ATX Fully-modular 80 PLUS Gold Black

The Seasonic CORE GC-650 ATX 3.1 is a fully modular 650 W power supply designed for modern desktop PCs. Compliant with ATX 3.1 and PCIe 5.1 standards, it delivers 650 W of continuous power with 80 PLUS Gold efficiency. The unit features a 24-pin ATX motherboard connector, a 120 mm active cooling fan with Seasonic’s Smart and Silent Fan Control (S2FC), fully modular braided black cables, and native support for next‑generation and legacy GPU connectors. The design includes Seasonic’s new OptiSink PCB and thermal layout to improve heat dissipation, reliability, and allow safe installation in any orientation. A 7-year manufacturer’s warranty covers the product.

Advantages

The CORE GC-650 combines ATX 3.1 and PCIe 5.1 compliance with 80 PLUS Gold efficiency to provide reliable power delivery and reduced energy losses. Fully modular cabling and braided black cables simplify system building and cable management. The OptiSink redesign and automated PCB manufacturing increase thermal performance and long-term reliability while enabling flexible installation orientation. S2FC balances cooling needs and acoustics to keep noise low under typical loads. Included native 12V-2x6 and 2×8-pin GPU connections and adapter support improve compatibility with both next‑gen and legacy graphics cards.

Suitable for

• Mainstream and enthusiast gaming PCs
• Workstations with single high‑performance GPU
• System builds requiring ATX 3.1 and PCIe 5.1 compatibility
• Upgrades where modular cabling and improved cooling are desired

Key specifications

• Total power: 650 W
• AC input voltage: 100–240 V
• AC input frequency: 50/60 Hz
• Motherboard connector: 24‑pin ATX
• Efficiency certification: 80 PLUS Gold
• Form factor: ATX, fully modular
• Fan diameter: 120 mm (active)
• Color: Black

How to use

Install the CORE GC-650 into a compatible ATX case following the case manufacturer’s instructions and secure it with screws. Connect the 24‑pin ATX cable to the motherboard, attach CPU and PCIe connectors as required for your components, and route SATA and peripheral cables to storage and accessories. Connect the AC power cable to a grounded outlet. Ensure adequate case airflow and keep vents unobstructed. The S2FC fan control is automatic; no user configuration is required.

Recommendations

For stable operation, use the power supply within its rated power range and keep the system clean and ventilated. Verify GPU connector compatibility before installation—use the included native 12V‑2x6 and 2×8‑pin adapter where necessary. Follow the 7‑year warranty terms for service and support.