Lian Li SP Platinum 850W SFX Form Factor Power Supply with 12V-2x6 Connectors - ATX 3.1 & PCIE 5.1 Compliant - Low-Noise - Fully Modular - 105°C Capacitors - 10 Year Warranty - White (SP0850P.W)
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AI Verdict
This 850-watt SFX power supply with ATX 3.1 and 12V-2x6 connectors is for compact gaming builds needing modern GPU power.
This 850-watt SFX power supply is a strong fit for small form factor builds that need to power modern, high-end GPUs. Its ATX 3.1 and PCIe 5.1 compliance, along with the 12V-2x6 connector, directly address the power demands of current graphics cards in a compact footprint. The 80 Plus Platinum efficiency and 10-year warranty also provide long-term value and stability.
If you don't need the compact SFX size, look for an ATX 3.1 compliant PSU with similar wattage and 80 Plus Platinum efficiency to potentially save some money.
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Pros
- Delivers 850 watts in a compact SFX form factor, measuring 125mm (W) x 63.5mm (H) x 100mm (D).
- Features ATX 3.1 and PCIe 5.1 compliance with a dedicated 12V-2x6 600W cable for current-generation GPUs.
- Achieves up to 92% efficiency with its 80 Plus Platinum certification, reducing wasted power.
- Operates silently with a fanless mode when under 40% load, engaging the 92mm FDB fan only when necessary.
- Built with 100% Japanese 105°C-rated capacitors for stable performance and a 10-year warranty.
- Includes an SFX-to-ATX bracket for installation in standard ATX cases, expanding compatibility.
Cons
- The 92mm fan, while quiet at low loads, might produce more audible noise than larger 120mm fans found in some SFX-L PSUs when under higher loads.
- The 12V-2x6 connector can add approximately 17mm to the GPU's connection point, potentially creating clearance issues in extremely tight small form factor cases.
- The reference price range of $150-$299 places it in a mid-range price band, which may be a barrier for budget-focused builds.
Dimension Scores
The 850-watt output combined with 80 Plus Platinum certification (up to 92% efficiency) and ATX 3.1/PCIe 5.1 compliance with a 12V-2x6 connector provides top-tier power delivery for modern components.
Its fanless mode below 40% load ensures silent operation for a significant portion of usage, with a 92mm FDB fan handling higher loads.
Constructed with 100% Japanese 105°C-rated capacitors and backed by a 10-year warranty, indicating a focus on durability and long-term stability.
Being fully modular with super flexible DC cables simplifies routing, and the included SFX-to-ATX bracket adds installation flexibility.
Best For
- Small form factor (SFF) PC builds with high-performance ATX 3.1 and PCIe 5.1 GPUs.
- Gaming PCs requiring a dedicated 12V-2x6 600W power connector for graphics cards.
- Users prioritizing quiet operation during light loads and general desktop use.
- Compact workstations needing stable power delivery from 105°C Japanese capacitors.
Not Recommended For
- Budget PC builds where the mid-range price point is a concern.
- Users with older GPUs that do not require ATX 3.1 or a 12V-2x6 connector.
- Large ATX cases where the SFX form factor offers no specific advantage over a larger, potentially cheaper ATX PSU.
Watch Out For
- The 12V-2x6 connector's plastic housing adds about 17mm to the GPU's connector, which can make cable routing difficult or impossible in very compact cases.
Full Specifications
| ASIN | B0FN7GB798 |
| Brand | Lian Li |
| Wattage | 850 watts |
| Fan Count | 1 |
| Form Factor | SFX |
| Item Weight | 4.66 pounds |
| Manufacturer | LIAN LI |
| Connector Type | ATX |
| Cooling Method | Air |
| Output Wattage | 850 |
| Item model number | SP0850P.W |
| Compatible Devices | Desktop Computer, Gaming PC |
| Product Dimensions | 4.92 x 2.5 x 3.94 inches |
| Maximum Input Voltage | 264 Volts (AC) |
| Item dimensions L x W x H | 4.92 x 2.5 x 3.94 inches |
What Buyers Say
This Lian Li SFX power supply is a solid choice for anyone building a compact PC with a high-power GPU, especially since it's ATX 3.1 and PCIe 5.1 compliant with that 12V-2x6 cable right out of the box. Users really like how quiet it is during normal use because the fan just chills until you really push it. The flexible cables get a shout-out for making builds less of a headache, which is a big deal in small cases. The only real snag seems to be that new 12V-2x6 connector, which can be a bit bulky and might cause some tight squeezes with certain GPUs in super cramped builds.
“Man, this thing is perfect for my ITX build, finally a PSU that actually has the right cable for my 4080 without needing some janky adapter, and it's quiet too, mostly! Just wish that 12VHPWR plug wasn't so chunky, almost didn't fit with my side panel.”
Common Praise
- Includes a 12V-2x6 600W cable for direct connection to modern GPUs, avoiding adapters.
- Operates silently with its fanless mode when under 40% load.
- The compact SFX form factor fits well into small cases.
- Super flexible DC cables make routing easier in tight spaces.
- The 80 Plus Platinum efficiency helps keep the system cooler and uses less power.
- Comes with an SFX-to-ATX bracket for broader case compatibility.
Common Complaints
- The 12V-2x6 connector adds about 17mm to the GPU's connection, potentially causing clearance issues in very small cases.
Ownership Tips
- The included internal power switch cable (C14 to C13) is surprisingly useful for cutting power when the PSU is hard to reach inside a case.
- The flexible cables, combined with the included cable combs, make for a cleaner aesthetic and easier routing than expected in a small form factor build.
- The fanless mode is genuinely effective, keeping the system near-silent during web browsing and light tasks.
Frequently Asked Questions
Does this PSU come with the necessary cable for NVIDIA 40-series GPUs?
Yes, it includes a reinforced 12V-2x6 600W cable, making it compatible with NVIDIA 40-series graphics cards and other GPUs requiring the new PCIe 5.1 standard.
How quiet is this power supply?
It features a fanless mode that activates when the power supply is under 40% load, ensuring silent operation during light use. The 92mm FDB fan engages only when higher loads require active cooling.
Can I use this in a standard ATX case?
Yes, an SFX-to-ATX bracket is included in the box, allowing you to install this SFX power supply into larger ATX cases.
What kind of warranty does this power supply have?
Lian Li backs this power supply with a 10-year warranty, reflecting confidence in its build quality and the 105°C Japanese capacitors used.
Are the cables flexible for routing in small cases?
Yes, the power supply comes with super flexible DC cables, designed to simplify cable routing and improve airflow, especially in compact builds.
Buying Guide
When you're looking at power supplies, especially for a compact PC, you need to think about more than just wattage. The form factor (like SFX here) dictates if it'll even fit your case. Efficiency ratings (like 80 Plus Platinum) tell you how much power actually gets to your components versus how much is lost as heat, which matters for both your electricity bill and your system's temperature. And with newer graphics cards, having the right connectors, like the 12V-2x6, is crucial so you don't have to mess with adapters.
wattage (850 watts)
This is how much power the PSU can deliver to your components. Think of it like the horsepower of an engine; too little, and your PC won't run, too much, and you're just paying for unused capacity. 850 watts is plenty for most high-end gaming setups with a single powerful GPU.
form_factor (SFX)
This refers to the physical size and shape of the power supply. SFX is a smaller standard designed for compact cases, like mini-ITX builds. If your case only supports SFX, a larger ATX power supply simply won't fit, no matter how good it is.
80Plus Platinum Certified
This certification indicates the power supply's energy efficiency. Platinum means it's very efficient, converting at least 92% of the power from your wall into usable power for your PC at 50% load. Higher efficiency means less wasted electricity, less heat generated, and potentially a quieter system.
12V-2x6 Connectors - ATX 3.1 & PCIE 5.1 Compliant
These are the latest standards for power delivery to graphics cards. The 12V-2x6 connector is specifically designed for modern, power-hungry GPUs, ensuring stable power and preventing issues that could arise from using older adapter cables. ATX 3.1 and PCIe 5.1 compliance means it's built to handle the transient power spikes of these newer cards.
Alternatives
If this SFX unit is too small or too expensive, look for an ATX 3.1 compliant power supply with similar wattage and 80 Plus Platinum efficiency if you have a larger case, or a lower wattage SFX unit if your GPU doesn't demand 850W.
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