Lian Li SX Platinum 850W SXP Compact ATX Form Factor Power Supply w/ 12V-2x6 Cable - ATX 3.1 & PCIE 5.1 Compliant - 140mm Fan - Full Modular - 10 Year Warranty - White (SX0850P.W)
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AI Verdict
This 850W, 80 Plus Platinum, ATX 3.1 PSU with a 12V-2x6 cable is for compact builds needing modern GPU power.
This PSU is a strong fit for modern PC builds, especially those with space constraints, due to its compact 140mm depth and ATX 3.1 compliance with a native 12V-2x6 connector. Its 80 Plus Platinum efficiency and 10-year warranty also provide long-term value and reliability.
If you're building a system with multiple high-end GPUs or extreme power demands, consider a 1000W or 1200W model in this series for additional power headroom and potentially more PCIe 6+2 connectors.
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Pros
- Features a native 12V-2x6 (600W) connector with copper alloy terminals for next-gen GPUs.
- Achieves up to 92% efficiency at 50% load, earning an 80 Plus Platinum certification.
- Operates silently with a fanless mode when under 40% load.
- Built with 100% Japanese 105°C-rated capacitors for durability and stable performance.
- Comes with a 10-year warranty, indicating manufacturer confidence in its longevity.
- Includes braided main cables (24-pin, CPU, 12V-2x6 GPU) with cable combs for cleaner builds.
Cons
- The 12V-2x6 connector has a blue tint, which might clash with some white build aesthetics.
- SATA, Molex, and some PCIe cables use flat ribbon sleeving instead of full braiding.
- The fan is a 120mm Fluid Dynamic Bearing model, not 140mm as suggested by some product listings.
- Higher wattage models in the series have been noted to get audibly louder under full load.
Dimension Scores
The 80 Plus Platinum certification with up to 92% efficiency at 50% load and ATX 3.1 compliance for stable 12V power is above average.
The fanless mode at ≤40% load provides silent operation for a significant portion of use, though higher loads might introduce audible fan noise.
Utilizing 100% Japanese 105°C-rated capacitors and a 10-year warranty points to a high standard of internal components and durability.
Full modularity and braided main cables with included combs aid in clean routing, though some cables are flat ribbon.
Best For
- Compact ATX builds where a 140mm PSU depth is critical.
- Systems running modern, high-power GPUs requiring a native 12V-2x6 connector.
- Users prioritizing energy efficiency and reduced heat output with 80 Plus Platinum certification.
- Quiet PC enthusiasts who benefit from fanless operation at low loads.
Not Recommended For
- Budget-focused builds, given its entry-plus price band and Platinum efficiency.
- Users who require all cables to be braided for aesthetic consistency.
- Extreme overclockers pushing components to their absolute limits, where a 120mm fan might struggle with peak heat.
Watch Out For
- The 12V-2x6 connector has a blue molded section, which some users might find visually inconsistent with an all-white build.
- Only the main 24-pin, CPU, and 12V-2x6 GPU cables are braided; other cables like SATA and Molex are flat ribbon, potentially affecting cable management aesthetics.
- The fan size is 120mm, despite some product titles mentioning 140mm, which could be misleading for users expecting a larger fan.
- While not specific to the 850W, higher wattage models in the same series can become noticeably louder under full system load.
Full Specifications
| ASIN | B0FPCG8CJM |
| Brand | Lian Li |
| Wattage | 850 watts |
| Fan Count | 1 |
| Model Name | SX0850P.W |
| Form Factor | ATX |
| Item Weight | 6.38 pounds |
| Manufacturer | LIAN LI |
| Connector Type | PCI Express |
| Cooling Method | Air |
| Output Wattage | 850 Watts |
| Item model number | SX0850P.W |
| Compatible Devices | Computer |
| Product Dimensions | 5.91 x 3.39 x 5.51 inches |
| Item dimensions L x W x H | 5.91 x 3.39 x 5.51 inches |
What Buyers Say
The Lian Li SX Platinum 850W is positioned as a competitive option for modern PC builds, particularly those needing ATX 3.1 and PCIe 5.1 compliance with a native 12V-2x6 connector. Reviewers highlight its compact 140mm depth, making it suitable for a variety of cases. The 80 Plus Platinum efficiency and 10-year warranty are frequently mentioned as strong points. While the fan is 120mm, not 140mm as some product titles suggest, its fanless mode at low loads is a definite plus for quiet operation.
“Needed a new PSU for my 4070 Ti Super, this thing fit perfectly in my small case and the 12V-2x6 cable plugged right in, no adapters, finally!.”
Common Praise
- Includes a native 12V-2x6 (600W) cable, eliminating the need for adapters for new GPUs.
- Compact 140mm depth allows for installation in smaller ATX cases.
- Fanless operation up to 40% load keeps the system quiet during light tasks.
- Braided main cables and included cable combs contribute to a tidy build aesthetic.
- Backed by a 10-year warranty, offering long-term peace of mind.
- Uses 100% Japanese 105°C capacitors for enhanced reliability and stability.
Common Complaints
- The blue tint on the 12V-2x6 connector can be an aesthetic mismatch for white builds.
- Not all cables are braided; SATA, Molex, and some PCIe cables are flat ribbon.
- The fan is 120mm, not 140mm as listed in some product descriptions, which is a minor discrepancy.
- Higher wattage models in the series can produce noticeable fan noise under heavy load.
Ownership Tips
- The fanless mode actually works, my PC is dead silent when I'm just browsing or watching videos.
- Cable management was easier than expected with the braided main cables, but the flat SATA cables are a bit stiff.
- The white color of the PSU and cables really helps blend it into my white case build.
- The 12V-2x6 connector feels really secure once it clicks in, that blue part is a good visual cue.
- Haven't heard the fan much yet, even under gaming loads, so it seems pretty quiet for an 850W unit.
Frequently Asked Questions
Does this PSU come with a 12V-2x6 cable?
Yes, it includes a native 12V-2x6 cable, which is essential for powering modern, high-end graphics cards that use this connector.
Is this power supply fully modular?
Yes, the Lian Li SX Platinum 850W is a fully modular power supply, allowing you to connect only the cables your system needs for cleaner cable management.
What is the fan size and how quiet is it?
It features a 120mm Fluid Dynamic Bearing fan that operates in a fanless mode when the load is at or below 40%, ensuring silent operation during light use.
What is the efficiency rating of this PSU?
This power supply is 80 Plus Platinum certified, meaning it achieves up to 92% efficiency at 50% load, which helps reduce energy consumption and heat generation.
What kind of capacitors does it use?
It uses 100% Japanese 105°C-rated capacitors, known for their durability and stable performance under thermal stress.
Will this fit in a small form factor case?
With a compact depth of 140mm, it's designed to fit in a wide range of cases, including many smaller ATX compatible enclosures.
Buying Guide
When picking a power supply, you're looking for something that can reliably power all your PC parts without overheating or making too much noise. You need enough wattage for your CPU and GPU, and the right connectors for everything. Efficiency ratings tell you how much power is wasted as heat, and a longer warranty usually means better quality components.
Wattage (850W)
This is how much power the PSU can deliver. Think of it like the engine size in a car; you need enough horsepower to move your vehicle (PC components). An 850W unit is suitable for most mid-to-high-end gaming PCs with a single powerful graphics card.
80 Plus Platinum Certified
This certification indicates how efficiently the PSU converts AC power from your wall into DC power for your components. Platinum means it's very efficient (up to 92% at 50% load), wasting less power as heat, which saves on your electricity bill and keeps your PC cooler. It's like getting better gas mileage in your car.
ATX 3.1 & PCIe 5.1 Compliant with 12V-2x6 Cable
This is crucial for modern graphics cards. ATX 3.1 is the latest power supply standard, and PCIe 5.1 with the 12V-2x6 cable is the new direct power connector for high-end GPUs like NVIDIA's 40-series. It ensures your PSU can safely and stably deliver the high power these cards demand without needing bulky adapters.
Full Modular
A fully modular PSU means you only plug in the cables you actually need for your components. This makes building your PC much tidier, improves airflow inside your case, and simplifies cable management, like having custom-fit wires instead of a tangled mess.
Alternatives
If this 850W unit isn't enough, look for PSUs with higher wattage (1000W or 1200W) if you plan on running multiple power-hungry GPUs or extreme overclocking. If you need a smaller physical size, search for SFX or SFX-L form factor PSUs, but ensure they still meet ATX 3.1 and PCIe 5.1 standards.
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