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White compact ATX power supply 150 by 86 by 140 mm with 140 mm fan

Lian Li

Lian Li SX1000P.W 1000W Platinum ATX power supply

SKU CH-2XHD-09DTS MPN SX1000P.W

A 1000 W ATX 3.1 and PCIe 5.1 power supply with 80 PLUS Platinum efficiency, a 140 mm fan offering fanless mode up to 40 % load, and fully modular braided cables

  • Max wattage1000 W
  • Power factor correctionActive PFC, PF > 0.95 under full load @ 115Vac, 60 Hz
  • PSU noise rating39.9 dB
  • AC input frequency100-240Vac
  • Mean time between failures100,000 hrs minimum 25℃/75% Load
  • Product typeATX

Model 1000W White

  • Platinum efficiency saves power with up to 94% conversion at 50% load
  • Silent operation below 40% load thanks to smart stop/start fan mode
  • ATX 3.1 and PCIe 5.1 ready for modern GPU power demands
  • Compact 150mm depth fits small cases while delivering 1000W output
  • 105°C Japanese capacitors and 100,000-hour MTBF ensure long-term reliability

Platinum ATX 3.1 power supply

The Lian Li SX1000P.W delivers 1000 W of continuous power in a compact ATX form factor. It meets ATX 3.1 and PCIe 5.1 specifications and includes a 12V-2x6 cable for modern graphics cards. The fully modular design lets builders connect only the cables their system requires.

Sustained load behaviour

At 50 % load the unit reaches 94 % conversion efficiency, keeping heat and AC losses low during long sessions. A smart fan stop engages at or below 40 % load for silent running and can be toggled via a rear switch. MTBF is rated at 100 000 hours minimum at 25 °C and 75 % load.

Build and connectors

All capacitors are Japanese 105 °C rated for durability under thermal stress. Super flexible braided cables with combs simplify routing in tight chassis. The 140 mm fan operates at 39.9 dB under load while active PFC maintains a power factor above 0.95 at 115 V 60 Hz.

How it compares

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

Price $129.99
Cheaper than about 55% of the 10,869 comparable items (median $142.99).
Max wattage 1000 W
Higher than about 70% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameLIAN LI
Product typeATX
Power
Max wattage1000 W
Power factor correctionActive PFC, PF > 0.95 under full load @ 115Vac, 60 Hz
AC input frequency100-240Vac
Size & build
Product dimensions150 mm(W)x86 mm(H)x140 mm(D)
Shipping weight3.18 kg
Package size305 × 216 × 127 mm
Environment & compliance
PSU noise rating39.9 dB
More details
Mean time between failures100,000 hrs minimum 25℃/75% Load

Other versions of this model

3 more in the same range

Questions about this item

How loud is the 140mm fan when the PSU runs at full load all day?

The unit is rated at 39.9 dB under typical operating conditions.

Which cables must I already have to power a modern GPU with this 1000W unit?

A native 12V-2x6 cable is included, so no extra adapter is required for PCIe 5.1 graphics cards.

Will the ATX 3.1 design work reliably with my older motherboard that only supports ATX 2.x?

Yes, the power supply is backward compatible with earlier ATX specifications.

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