Lian Li SP 850 SFX Power Supply - 850W 80+ Gold, Low Noise

Our review of the Lian Li SP 850 finds it aimed at builders who need a compact but capable power source for high-end GPUs. The bottom line: this full modular SFX unit delivers up to 850W of stable power and includes a 12VHPWR cable for NVIDIA 40 series cards, making it a practical choice for compact gaming or workstation builds that require certified efficiency and modern GPU connectivity. Noise and cable routing are important trade-offs to consider before buying.

Key Features

• Full modular design: Simplifies cable management and keeps a compact case interior tidy by allowing only needed cables to be installed.
• 12VHPWR connector included: Ready for NVIDIA 40 series graphics cards without requiring third-party adapters, reducing installation hassle.
• 80 PLUS Gold efficiency: Provides efficient operation across typical loads with measured efficiency between 90.9 and 92.6 percent.
• Comprehensive protections: Built-in OVP, OPP, SCP, UVP, OCP and OTP protect components and improve long-term reliability under varied conditions.
• Added inrush current limiter: Helps protect sensitive systems from startup surges and improves compatibility with compact builds and aggressive power draws.

Who It's For

The SP 850 is best for PC builders who want a high-efficiency SFX power supply capable of powering modern GPUs in small enclosures, such as compact gaming rigs or compact workstations. Its full modular layout and included 12VHPWR cable make it convenient for those fitting RTX 40 series cards or similar power-hungry GPUs.

It may be less suitable for users who need very long stock cables; some builders report the 24-pin is extremely short in tight layouts. If you require a non-SFX form factor, or absolute lowest-noise silent operation at idle, consider alternatives tailored specifically to those priorities.

Pros & Cons

Pros

• High build quality and attractive finish with steel and brush aluminum housing that reviewers consistently praised.
• Includes a 12VHPWR cable for direct support of current high-end GPUs, simplifying upgrade paths.
• Efficient 80 PLUS Gold performance and active PFC for better power delivery and lower waste.
• Five-year warranty and protective features add confidence for long-term use.

Cons

• Some users find the motherboard 24-pin cable very short, which can limit placement options in certain cases.
• Noise varies with load; while acceptable under many conditions, peak dBA can rise noticeably under heavy load.

Specifications

Form factor	SFX
Max DC output	850W
+12V rail	840W
Combined +3.3V & +5V	100W
Certification	80 PLUS Gold
Input range	100 - 264 Vrms, 47 - 63 Hz
Warranty	5 years

Our Verdict

The SP 850 is a well-built, efficient SFX power supply that makes sense for compact systems needing an 850W capacity and native 12VHPWR support. It balances strong protections, attractive construction and modular convenience, making it good value for builders who prioritize modern GPU compatibility in small cases, though cable lengths and load-dependent noise should be checked against your chassis and layout.

Frequently Asked Questions

Does the unit support modern RTX 40 series cards?
Yes. The package includes a 12VHPWR connector cable intended for NVIDIA 40 series GPUs without sideband contact.

Is it quiet in small cases?
Noise is generally moderate; idle and light loads are quiet, but dBA can rise under heavy GPU or CPU load as reported by some users.

Are cables long enough for larger cases?
Cable length is suitable for many compact builds, but the 24-pin motherboard cable has been reported as very short by some builders, so measure your case routing before buying.