Lian Li 750W SFX Gold Power or Lian Li SP850 850W Gold SFX? Which Lian Li Model to Buy
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When comparing the lian li sp 750 performance sfx vs lian li sp850 850w 80, you are looking at two high-end SFX units from Lian Li. Both models feature 80 PLUS Gold efficiency ratings and fully modular cable designs. The primary difference lies in their power output and physical dimensions. The SP750 offers 750 watts of power, while the SP850 delivers 850 watts. You need to check your case compatibility and power needs before deciding which unit fits your build best.
Key differences
| Aspect | Lian Li 750W SFX Gold Power Supply | Lian Li SP850 850W Gold SFX Power Supply |
|---|---|---|
| Wattage | 750W | 850W |
| Model Number | SP750 | SP850B |
| Width | 4.13 inches | 8 inches |
| Height | 7 inches | 5 inches |
| Length | 9.5 inches | 10 inches |
| Weight | 2.2 pounds | not listed |
Which one should you choose?
Choose Lian Li 750W SFX Gold Power Supply if
- You need a power supply that fits into smaller SFX cases with tighter width constraints.
- You are building a system that requires up to 750 watts of power.
- You prefer a unit with a listed weight of 2.2 pounds for easier handling.
Choose Lian Li SP850 850W Gold SFX Power Supply if
- You require higher power output for more demanding components.
- You have a case that can accommodate the wider 8-inch width of the SP850.
- You want the highest wattage option available in this specific Lian Li SFX lineup.
Verdict: The SP750 is the better choice for builders prioritizing compactness and proven weight specifications. The SP850 suits those who need extra power headroom and have the case space for its larger footprint. Your decision should depend on whether your case can handle the SP850's wider dimensions.
SP750 vs SP850 Specs Compared
Wattage Output
The Lian Li SP750 delivers 750W of continuous power, while the SP850 provides 850W. This 100W difference matters if you run high-end graphics cards or multiple drives. The SP850 offers more headroom for future upgrades or heavy workloads. The SP750 is sufficient for most mid-range builds. Choose the SP850 if you need maximum power density in a small case. The SP750 is ideal if your components require less than 750W.
Dimensions
The SP750 measures 4.13 inches wide, 7 inches high, and 9.5 inches long. The SP850 is wider at 8 inches, taller at 5 inches, and longer at 10 inches. Case compatibility varies significantly between these two sizes. The SP750 fits more compact SFX cases due to its lower profile height. The SP850 requires cases with larger internal clearances. Check your case specifications carefully before choosing. The SP750 offers better fitment for smaller form factor builds.
Efficiency Rating
Both units carry the 80 PLUS Gold efficiency certification. This means both convert at least 87% of AC power to DC power at typical loads. You will see similar energy savings and less heat generation from either model. The efficiency rating is identical for both the SP750 and SP850. This spec does not help you distinguish between them. Both models will perform similarly regarding power waste and thermal output under load.
Modularity
Both the SP750 and SP850 are fully modular power supplies. You can connect only the cables you need, reducing clutter inside your case. This feature is standard on both models. The SP750 uses fully modular braided cables for a clean look. The SP850 is also fully modular. This aspect is a tie for both products. You get the same cable management flexibility regardless of which wattage you choose.
Build Weight
The SP750 weighs 2.2 pounds. The SP850 weight is not listed in the provided data. Heavier units often indicate more robust internal components or larger transformers. Without the SP850 weight, you cannot compare build mass directly. The SP750 is a compact and lightweight option for SFX builds. If weight is a critical factor for your specific case or transport needs, the SP750 has known specifications. The SP850 data is incomplete for this comparison.
Silent Operation
The SP750 features a ZERO RPM mode under 40% load for silent operation. This means the fan stops spinning completely during light tasks. The SP850 silent operation specs are not listed in the provided data. If you value quiet performance at low loads, the SP750 has a clear advantage. You will experience zero fan noise with the SP750 in typical office or browsing scenarios. The SP850 may or may not have this feature, but it is not confirmed by the data.
Which Lian Li SFX Power Supply Fits You
Users needing max power for high-end GPUs
The SP850 delivers 850W of continuous output, giving you 100W more headroom than the SP750. This extra capacity supports demanding graphics cards and heavy workloads without strain. If your build requires significant power for future upgrades or intensive tasks, the higher wattage rating ensures stable performance under load.
Owners of small form factor cases
The SP750 measures 9.5 inches in length, making it shorter than the SP850's 10-inch design. This reduced footprint fits better in compact chassis where space is limited. The 7-inch height and 4.13-inch width also align with standard SFX dimensions, ensuring compatibility with smaller cases that cannot accommodate the larger SP850.
Seekers of silent operation at low loads
The SP750 features a ZERO RPM mode that keeps the fan silent when the load is under 40%. This means quiet operation during light tasks like web browsing or office work. The SP850 data does not mention this specific fan control feature, making the SP750 the better choice for noise-sensitive environments.
The products compared
Lian Li 750W SFX Gold Power Supply
Best for: Silent small form factor builds
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS GOLD
- Modularity
- Fully modular
- Form Factor
- SFX
- Dimensions
- 9.5 × 4.13 × 7 inches
- Weight
- 2.2 pounds
View on Amazon: Lian Li 750W SFX Gold Power Supply Affiliate link
The Lian Li SP 750 is a fully modular SFX power supply rated at 750W with 80 PLUS Gold efficiency. It uses Japanese electrolytic capacitors for durability and features zero RPM mode under 40% load for silent operation. This unit suits small form factor builds where you need reliable power without excessive noise. It offers a clean look with braided cables.
Pros
- 80 PLUS Gold efficiency rating
- Fully modular braided cables
- Japanese electrolytic capacitors
- Zero RPM mode under 40% load
Cons
- Lower 750W output compared to 850W alternatives
- Heavier at 2.2 pounds
- Larger dimensions than standard SFX units
Good fit if
- You need a compact SFX power supply
- You prioritize efficiency and silence
- You want fully modular cables
Skip if
- You require more than 750W of power
- You need the absolute smallest SFX footprint
- You prefer Platinum efficiency ratings
Verdict: Lian Li SP 750W SFX Gold PSU fits users who need reliable, efficient power in a small case. It is ideal for builds where silence and clean cabling matter more than maximum wattage.
Lian Li SP850 850W Gold SFX Power Supply
Best for: compact high-performance PC builds
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- Form Factor
- SFX
- Dimensions
- 10 × 8 × 5 inches
View on Amazon: Lian Li SP850 850W Gold SFX Power Supply Affiliate link
The Lian Li SP850 is a fully modular SFX power supply rated for 850W. It carries an 80+ Gold efficiency certification. The unit measures 10 by 8 by 5 inches. This model suits builders who need high wattage in a small form factor case. The fully modular design helps manage cable clutter in tight spaces.
Pros
- 850W output capacity
- 80+ Gold efficiency rating
- Fully modular cable design
- Compact SFX form factor
Cons
- 10-inch length may not fit all small cases
- Heavier build than standard ATX units
- Higher price point than lower wattage models
Good fit if
- You are building a compact PC with high power needs
- You want efficient power delivery in a small case
- You need fully modular cables for clean builds
Skip if
- You have a standard ATX case
- You need more than 850W of power
- You are on a tight budget
Verdict: The Lian Li SP850 850W SFX Gold delivers high performance in a small package. It is ideal for compact builds that require significant power. Buyers should check their case dimensions before purchasing.
Specifications side by side
| Spec | Lian Li 750W SFX Gold Power Supply | Lian Li SP850 850W Gold SFX Power Supply |
|---|---|---|
| Wattage | 750W | 850W |
| Efficiency Rating | 80 PLUS GOLD | 80+ Gold |
| Modularity | Fully modular | Fully Modular |
| Form Factor | SFX | SFX |
| Dimensions | 9.5 × 4.13 × 7 inches | 10 × 8 × 5 inches |
| Weight | 2.2 pounds | not stated |
| Size | 750W(V1),Black | 16 AWG size |
| Color | Black | not stated |
| Model | SP750 | SP850B |
Frequently asked questions
Which Lian Li SFX PSU is better for silent builds?
The Lian Li SP750 is the better choice for users prioritizing silence in small form factor builds. This model is specifically noted for its quiet operation and clean cabling, which helps maintain a low noise profile. If you value a peaceful computing environment over maximum wattage, the 750W unit is ideal.
Does the Lian Li SP850 fit in all SFX cases?
No, the SP850 does not fit in all SFX cases due to its larger physical dimensions. It measures 10 inches in length, 8 inches in width, and 5 inches in height. You must verify your case interior space before purchasing, as these dimensions exceed standard SFX form factor sizes.
What is the difference in size between the SP750 and SP850?
The SP750 is more compact than the SP850. The SP750 measures 9.5 inches long, 4.13 inches wide, and 7 inches high. In contrast, the SP850 is larger at 10 inches long, 8 inches wide, and 5 inches high. The SP750 also weighs 2.2 pounds.
Is the Lian Li SP750 fully modular?
Yes, the Lian Li SP750 features a fully modular cable design. This allows you to connect only the cables you need, reducing clutter inside your case. Combined with its 80 PLUS Gold efficiency rating, it offers a clean and efficient power solution for small builds.
Can the SP850 handle high-end graphics cards?
Yes, the SP850 is designed for compact high-performance PC builds. It delivers 850W of continuous power, providing significant headroom for demanding graphics cards and heavy workloads. Its 80 PLUS Gold efficiency rating ensures reliable performance under load.
What color options are available for the Lian Li SP750?
The Lian Li SP750 is available in black. This color option helps it blend seamlessly with most small form factor cases and component aesthetics. The unit is identified by the model number SP750 and features a black finish.