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White SFX power supply with brushed aluminium housing

Lian Li

Lian Li SP850W 850W SFX power supply

SKU CH-XXNE-S40DJ MPN SP850W

An 850 W fully modular SFX unit with 80 PLUS Gold efficiency, a 92 mm hydraulic bearing fan that stays at zero RPM until 40 % load or 60 °C, and a 16 AWG 12VHPWR cable for PCIe 5.0 GPUs

  • Max wattage850 W
  • Modular cablingFull Modular
  • Power factor correctionActive PFC(PF)>0.9 at full load
  • PSU length limit125 mm
  • Efficiency certification80 PLUS GOLD Certified
  • Product typeSFX

Model SFX 80+ Gold (850W) White

  • 80 PLUS Gold efficiency reduces wasted energy at 91.55 % under 115 VAC half load
  • Fully modular braided cables let you connect only what the build needs
  • 92 mm hydraulic bearing fan stays at zero RPM until 40 % load or 60 °C ambient
  • Japanese electrolytic capacitors deliver long-term stability and durability
  • Native 12VHPWR 16 AWG cable supplies 600 W to PCIe 5.0 GPUs without adapters

850W SFX power supply

The Lian Li SP850W is an 850 watt SFX form factor power supply finished in a white aluminium housing. It targets small-form-factor builders who need high output for power-hungry components in compact cases. Full modular cabling keeps cable routing clean inside tight chassis. Japanese electrolytic capacitors provide long-term reliability and stable voltage delivery.

80 PLUS Gold efficiency and protection

The unit meets 80 PLUS Gold certification with 91.55 percent efficiency at 50 percent load on 115 VAC input. Active power factor correction exceeds 0.90 at full load. An inrush current limiter protects internal components during startup. The 92 mm hydraulic bearing fan remains off until 40 percent load or 60 °C ambient temperature, then spins quietly under 2800 RPM.

12VHPWR cable and capacity limits

A native PCIe 5.0 12+4-pin cable rated at 16 AWG delivers up to 600 W without adapters for modern graphics cards. The 850 W maximum output supports demanding single-GPU builds with headroom for overclocking. Builds requiring more than 850 W or multiple high-power GPUs will exceed this unit’s capacity. Physical length is 125 mm, so verify case clearance before purchase.

How it compares

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

Price $126.99
Cheaper than about 56% of the 10,869 comparable items (median $142.99).
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameLIAN LI
Product typeSFX
Power
Max wattage850 W
Modular cablingFull Modular
Power factor correctionActive PFC(PF)>0.9 at full load
Efficiency certification80 PLUS GOLD Certified
Size & build
Shipping weight1.81 kg
Package size241 × 178 × 102 mm
Compatibility
PSU length limit125 mm

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 850 W SP850W or the 750 W SP750 for my build?

The SP850W delivers 850 W maximum power versus 750 W on the SP750, so pick the 850 W unit if your GPU and CPU combined draw can approach the higher ceiling; both share the same SFX dimensions and full modularity.

What does the 91.55 % efficiency at 50 % load mean for my electricity bill and thermals?

At typical 50 % load the PSU converts 91.55 % of AC input to DC output, wasting only about 8.5 % as heat, which lowers running cost and keeps case temperatures lower than a Bronze unit.

How much power can the included 12VHPWR cable actually supply to a PCIe 5.0 graphics card?

The bundled 12VHPWR cable uses 16 AWG conductors rated for 600 W, letting you connect a modern PCIe 5.0 GPU directly without an adapter.

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