Lian Li SP V2 850 Watt SFX Form Factor Power Supply with Native 12V-2x6 Cable - Low Noise - 80+ Gold Efficiency - ATX 3.1 & PCIe 5.0 Compliant - 92mm FDB Fan - 10-Year Warranty - Black (SP850G.B)
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AI Verdict
This 850-watt 80+ Gold SFX PSU with ATX 3.1, PCIe 5.0, and a native 12V-2x6 cable is for compact builds needing high-power GPU support.
This 850-watt SFX power supply is purpose-built for compact systems that demand significant power, especially for modern GPUs with its native 12V-2x6 cable and ATX 3.1 compliance. Its small footprint (125 × 100 × 63.5 mm) makes it ideal for space-constrained cases.
If you need even more power for extreme builds, look for SFX-L or ATX PSUs with higher wattages and Platinum efficiency ratings.
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Pros
- Provides 850 watts of power in a compact SFX form factor (125 × 100 × 63.5 mm).
- Features a native 12V-2x6 cable for PCIe 5.0 GPUs, compliant with ATX 3.1.
- Includes a 92mm FDB fan with a Zero RPM mode for silent operation until 40% load or 60°C ambient temperature.
- Offers 80+ Gold efficiency, delivering over 90% efficiency at 50% load (115V).
- Comes with a 10-year hardware protection warranty.
- Utilizes Japanese electrolytic capacitors for stability and durability.
Cons
- The 12V-2x6 connector's plastic portion adds approximately 17mm, potentially causing clearance issues in extremely tight builds.
- The fan, while having a Zero RPM mode, can become audibly noticeable when it spins up.
- Some users may find the included cable combs for asymmetrical cables to be direction-specific, requiring attention during installation.
Dimension Scores
The 80+ Gold certification ensures over 90% efficiency at 50% load, and the 850-watt output is substantial for an SFX unit.
The 92mm FDB fan with Zero RPM mode keeps it silent under 40% load, though it can become audible when the fan engages.
It features Japanese electrolytic capacitors for durability and stability, and a 10-year warranty indicates confidence in its construction.
The fully modular design and embossed, anti-tangle cables simplify routing and reduce clutter in compact builds.
Best For
- Small Form Factor (SFF) PC builds with high-performance GPUs.
- Systems requiring ATX 3.1 and PCIe 5.0 compliance for future-proofing.
- Users prioritizing quiet operation during low system loads.
Not Recommended For
- Budget-focused builds where lower wattage or less efficient PSUs are acceptable.
- Users with extremely limited space around the GPU connector who cannot accommodate an extra 17mm.
Watch Out For
- The 12V-2x6 cable's connector extends roughly 17mm from the GPU, which can be a tight fit in some SFF cases.
- While it has a Zero RPM mode, the 92mm FDB fan can be noticeably audible once it starts spinning up under load.
- The two-tone 12V-2x6 cable with visual cues for proper seating requires full insertion to ensure safe operation.
Full Specifications
| ASIN | B0FJCS3H1G |
| Brand | Lian Li |
| Wattage | 850 watts |
| Model Name | SP850G.B 28145201 |
| Form Factor | SFX |
| Item Weight | 3.92 pounds |
| Manufacturer | LIAN LI |
| Connector Type | ATX |
| Cooling Method | Air |
| Output Wattage | 850 Watts |
| Item model number | SP850G.B |
| Compatible Devices | Desktop Computer |
| Product Dimensions | 4.92 x 2.5 x 3.94 inches |
| Maximum Input Voltage | 120 Volts (AC) |
| Item dimensions L x W x H | 4.92 x 2.5 x 3.94 inches |
What Buyers Say
This PSU is a solid choice for anyone building a compact PC, especially if you're rocking a newer GPU. Users really like that native 12V-2x6 cable, which makes hooking up those power-hungry graphics cards way less of a headache than using adapters. The small size is a huge win for SFF cases, and the 10-year warranty gives a lot of peace of mind. While the fan is quiet most of the time, some folks have noted it's not completely silent once it kicks in.
“Dude, this thing is tiny but packs a punch! My new 40-series card plugged right in, no weird adapters, and my SFF case actually closed! Fan kicks on sometimes, but honestly, it's not a jet engine. Worth it for the clean build.”
Common Praise
- The native 12V-2x6 cable simplifies connections for PCIe 5.0 GPUs.
- The SFX form factor fits perfectly in small cases.
- Zero RPM fan mode provides silent operation during light loads.
- The fully modular cables make for a clean build.
- The 10-year warranty is a big plus for long-term use.
- Upgraded 5VSB rail supports modern peripherals better.
Common Complaints
- The 12V-2x6 connector can be bulky, adding about 17mm to the GPU's length, which can be an issue in very tight cases.
- The fan, when it does spin up, can be audibly noticeable.
- Some users find the cable combs for asymmetrical cables to be tricky to orient correctly.
Ownership Tips
- The two-tone 12V-2x6 cable with visual cues is genuinely helpful for ensuring a fully seated connection, preventing potential power issues.
- The embossed cables are surprisingly flexible and easier to route than standard braided cables.
- The Zero RPM mode works as advertised, keeping the system very quiet during web browsing or light tasks.
- The upgraded 5VSB rail seems to handle all my USB-powered accessories without a hitch, even when the PC is off.
Frequently Asked Questions
What are the dimensions of this power supply?
The Lian Li SP V2 850W SFX PSU measures 125 × 100 × 63.5 mm.
Does this PSU support the latest graphics cards?
Yes, it is ATX 3.1 and PCIe 5.0 compliant and includes a native 12V-2x6 cable designed for high-performance 50/40 series graphics cards.
Is the fan always on?
No, the 92mm FDB fan features a Zero RPM mode, meaning it will not spin until the PSU reaches 40% load or the ambient temperature hits 60°C.
What kind of warranty does it have?
The Lian Li SP V2 850W SFX PSU is backed by a 10-year hardware protection warranty.
Are the cables modular?
Yes, it is a fully modular power supply, allowing you to connect only the cables your system needs.
Buying Guide
When you're picking a power supply, especially for a small PC, you need to think about more than just wattage. The form factor (SFX here) dictates if it'll even fit your case. Efficiency (80+ Gold) means less wasted power and less heat. Crucially, for newer graphics cards, look for ATX 3.1 and a native 12V-2x6 cable to avoid adapter headaches and ensure stable power delivery.
SFX Form Factor
This refers to the physical size of the power supply. SFX PSUs are much smaller than standard ATX PSUs, which is essential for fitting into compact Small Form Factor (SFF) PC cases. Think of it like trying to fit a full-size car engine into a tiny sports car – it just won't work unless the engine is also tiny.
80+ Gold Efficiency
This rating indicates how much power the PSU converts into usable electricity for your components versus how much is lost as heat. Gold means it's at least 87% efficient at 100% load and 90% at 50% load (at 115V), which saves you a little on your electricity bill and means less heat generated inside your case.
Native 12V-2x6 Cable & ATX 3.1
This is crucial for modern, high-power graphics cards. The 12V-2x6 cable (also known as 12VHPWR) provides direct, stable power to these cards without needing bulky adapters, which can be a fire hazard if not properly seated. ATX 3.1 compliance means the PSU is designed to handle the rapid power spikes these cards can draw, preventing system crashes.
Alternatives
If you need more wattage or even higher efficiency, search for SFX-L or ATX power supplies with 80+ Platinum or Titanium ratings. If your case is larger, an ATX PSU might offer more cable options or a larger, quieter fan.
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