The ASUS Prime 650W Bronze PSU is a 650W ATX power supply built for daily-use desktops and mid-range gaming builds that need stable, efficient power delivery without overcomplicating the build process. It carries an 80 Plus Bronze certification, dual ball fan bearings rated to 80,000 hours, and etched cables designed for easier routing during installation. A six-year warranty and a full set of protection features make it a solid foundation for a reliable system.

Why This Product

• 80 Plus Bronze certified efficiency — The 80 Plus Bronze rating is achieved through low-ESR electrolytic capacitors and other premium components, reducing wasted energy as heat compared to uncertified units.
• Dual ball bearings rated to 80,000 hours — Dual ball fan bearings last up to twice as long as sleeve bearing designs and outlast even fluid dynamic bearings, keeping the unit running quietly over a long service life.
• Etched cables for easier cable management — Made from a pliable material, the etched cables bend easily during installation and operate at temperatures 50°C below the safety limit when routed for cable management. They also meet UL1581 and UL758 standards.
• Comprehensive built-in protection — It includes over-power, over-voltage, under-voltage, short-circuit, over-current and over-temperature protection (OPP/OVP/UVP/SCP/OCP/OTP) to guard connected components.
• Six-year warranty included — A six-year warranty is included in the box, providing long-term coverage for a core system component.

At a Glance

Total Output	650W
Efficiency Rating	80 Plus Bronze
Form Factor	ATX12V
Fan Size	135mm
Fan Bearing Type	Dual ball bearings (up to 80,000 hrs)
Warranty	6 years
MTBF	>120,000 hrs @ 25°C
Dimensions	150 x 150 x 86 mm

Compatibility

• ✓ Compatible with ATX12V form factor cases and motherboards — the standard for the vast majority of desktop PC builds.
• ✓ Accepts a wide AC input range of 100-240V, making it suitable for use in most countries worldwide.
• ✓ Includes two PCI-E 8-pin connectors, supporting mid-range discrete graphics cards that require one or two power connectors.
• ✓ Provides five SATA power connectors and three peripheral connectors, covering typical storage and accessory configurations.
• ✗ Does not include AURA SYNC RGB support — unsuitable for builders who want RGB-lit PSU fans synchronised with an ASUS lighting ecosystem.
• ✗ Does not feature a 0dB fan mode — the fan runs at all times and will not switch off under light load for silent operation.

Best For / Trade-offs

Best for:

• All-round desktop and mid-range gaming builds that need a reliable 650W supply with Bronze-level efficiency and a full connector set.
• Builders who prioritise longevity — dual ball fan bearings rated to 80,000 hours and a six-year warranty suit systems intended to run for many years.
• Those focused on cable tidiness — the flexible etched cables are specifically designed to ease routing and cable management inside the case.
• International buyers or builders in regions with variable mains voltage , thanks to the 100-240V universal AC input range.

Trade-offs:

• High-end GPU builds requiring more than two PCI-E power connectors — the included cable set tops out at two PCI-E 8-pin connections.
• Silence-focused builds — without a 0dB fan mode, the fan does not stop under light loads, which matters in near-silent home or office environments.
• Builders wanting RGB synchronisation — AURA SYNC is explicitly absent from this unit.
• Workloads demanding Gold or Platinum efficiency — the 80 Plus Bronze rating is lower than Gold or Platinum tiers, meaning slightly higher energy consumption at equivalent loads.

Description

Featuring advanced power delivery, exceptional efficiency, and reliable performance, ASUS Prime series power supplies are the perfect choice for daily users. With comprehensive cooling solutions and reliable power delivery, these PSUs ensure optimal performance and stability.

Prime Performance
With 80+ Bronze certification, dual ball fan bearings, etched cables and an 6-year warranty, the ASUS Prime series PSU brings efficient and durable power delivery to reliable performance for the system build.

Dual Ball Fan Bearings — 2X Longer Lifespan
Dual ball bearings boast an extensive lifespan of up to 80,000 hours, lasting twice as long as sleeve bearings and exceeding even fluid dynamic bearings. This means long-lasting, reliable cooling with minimal noise when you choose the ASUS Prime Bronze series.

135mm Fan Design
The 135mm fan can reduce heat more effectively, making the PSU cooler and less noise.

Etched Cables
Made from a pliable premium material, these etched cables are easily flexible during installation, and they operate at temperatures 50°C lower than the safety limit when routed for cable management. These cables also meet the rigorous standards of the UL1581 flame test and UL758 certification, helping to ensure a smooth PC DIY experience and exceptional safety.

Specifications

General

Brand	ASUS
Model	PRIME-650B-BLACK
Form Factor	ATX12V
Total Output	650W
Efficiency Certification	80 Plus Bronze
PFC Type	Active PFC
AURA SYNC	No
0dB Fan Mode	No

Power Output

AC Input Range	100-240Vac
DC Output Voltages	+3.3V, +5V, +12V, -12V, +5Vsb
Maximum Load	+3.3V: 20A, +5V: 20A, +12V: 54A, -12V: 0.3A, +5Vsb: 2.5A
Combined Load	+3.3V/+5V: 110W, +12V: 648W, -12V: 3.6W, +5Vsb: 12.5W
Protection Features	OPP, OVP, UVP, SCP, OCP, OTP

Connectors & Cables

Motherboard Connector	24/20-pin x 1
CPU Connector	4+4-pin x 1
PCI-E Connectors	8-pin x 2
SATA Connectors	5
Peripheral Connectors	3
Cable Type	Etched cables (UL1581 and UL758 certified)

Physical & Reliability

Dimensions	150 x 150 x 86 mm
Weight (unit)	2.2 kg
Weight (with packaging)	3.067 kg
Fan Size	135mm
Fan Bearing Type	Dual ball bearings
Fan Lifespan	Up to 80,000 hours
MTBF	>120,000 hrs @ 25°C
Warranty	6 years
Compliance	RoHS