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Rectangular black ATX power supply unit with cooling fan grille and power socket visible

KHACHIMO

KHACHIMO 650W ATX Power Supply FSP650-80GHN(85)

SKU CH-3Q5Y-2A78A

An 80 PLUS Gold ATX power supply delivering 650 W with Modern Standby support, Zero RPM fan mode and resonant LLC topology for quiet, efficient operation

  • Product typeATX
  • Modern Standby compatible for faster wake-from-sleep and better low-load efficiency
  • 80 PLUS Gold certified for lower power consumption, less noise and cooler temperatures
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion delivers clean, consistent power and reduces coil whine
  • DC-to-DC conversion enables more energy-efficient sleep states

650W ATX Power Supply for Modern PCs

This 650W ATX power supply delivers 80 PLUS Gold certified efficiency for modern desktop builds. It supports Modern Standby for rapid wake-from-sleep transitions and improved low-load efficiency. The unit is designed for systems requiring clean, consistent power delivery.

Sustained Load Behaviour and Efficiency

Under sustained load the resonant LLC topology with DC-to-DC conversion maintains stable voltage regulation and reduces coil whine. The 80 PLUS Gold rating ensures high efficiency across typical operating ranges, lowering power consumption and heat output. This design supports energy-efficient sleep states during prolonged use.

Installation and Common Issues

Standard ATX dimensions and connectors allow straightforward installation in compatible chassis. The zero RPM fan mode eliminates noise at low and medium loads, though the fan activates under heavier demand. Builders needing higher wattage or different form factors should verify requirements before purchase.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $323.99
Pricier than about 80% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

Does the 650W unit stay quiet and cool during long sessions?

It carries 80 PLUS Gold certification and a Zero RPM fan mode that stops the fan at low and medium loads, cutting noise and heat.

Which cables or connectors must my build already provide?

The supply uses a standard ATX form factor, so your case needs an ATX PSU cut-out and your motherboard a 24-pin ATX plus CPU power headers.

Will it work reliably with older components I want to keep?

Resonant LLC topology with DC-to-DC conversion delivers clean, stable rails that are compatible with legacy hardware.

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