Lian Li 750W SFX Gold Power vs Lian Li 1000W Gold ATX PSU: Spec Comparison
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This comparison examines the lian li sp 750 performance sfx vs rs1000g 1000w atx power supplies. Both units offer 80 PLUS Gold efficiency and fully modular cabling for clean builds. They share a black color option and use Japanese capacitors for durability. The main difference lies in their physical design and power capacity. One is a compact SFX unit for small cases, while the other is a standard ATX unit with higher wattage and modern connector support. You need to choose based on your case size and GPU requirements.
Key differences
| Aspect | Lian Li 750W SFX Gold Power Supply | Lian Li 1000W Gold ATX PSU with USB Fan Hub |
|---|---|---|
| Form Factor | SFX | ATX |
| Wattage | 750W | 1000W |
| ATX Version | not listed | ATX 3.1 |
| PCIe Connector | not listed | 12V-2x6 |
| Fan Size | not listed | 135 mm |
| Warranty | not listed | 10 years |
Which one should you choose?
Choose Lian Li 750W SFX Gold Power Supply if
- You are building in a small form factor case that requires SFX dimensions.
- Your system uses mid-range GPUs that do not exceed 750W power needs.
- You prioritize a compact footprint over maximum headroom for future upgrades.
Choose Lian Li 1000W Gold ATX PSU with USB Fan Hub if
- You need 1000W to support high-end graphics cards with high transient loads.
- You want native ATX 3.1 and PCIe 5.1 support with 12V-2x6 cables.
- You prefer a standard ATX size for easier installation and better airflow.
Verdict: Choose the SP 750 if your case is small and your power needs are moderate. Select the RS1000G if you need maximum wattage and modern connector support for high-end components. Both provide reliable efficiency, but their physical sizes dictate which build they fit.
SP750 vs RS1000G Spec Breakdown
Form factor
The Lian Li SP750 uses the SFX form factor, measuring 4.13 by 7 by 9.5 inches. This compact size fits small form factor cases where space is tight. The Lian Li RS1000G follows the standard ATX specification, measuring 8.19 by 5.15 by 12.8 inches. ATX units require larger cases with standard mounting holes. You must choose the form factor that matches your chassis. The SP750 offers flexibility for mini-ITX or mATX builds. The RS1000G is designed for standard mid-tower or full-tower enclosures. Each unit serves a different physical build requirement.
Wattage
Power output is the primary difference between these two units. The Lian Li SP750 provides 750W of continuous power. This is sufficient for mid-range graphics cards and standard CPUs. The Lian Li RS1000G delivers 1000W of power. This higher capacity supports high-end GPUs and overclocked processors. You need to match the wattage to your components. The RS1000G handles heavier power demands with more headroom. The SP750 is lighter on power but saves space. Your GPU and CPU draw determines which wattage you need.
ATX version
The Lian Li RS1000G supports the ATX 3.1 standard. It also meets PCIe 5.1 requirements for modern graphics cards. This ensures compatibility with the latest hardware and power connectors. The Lian Li SP750 does not list a specific ATX version in its data. It uses standard modular connections for its cables. If you have a new GPU requiring native 12V-2x6 support, the RS1000G is the better choice. The SP750 may require adapters or older cables. The RS1000G is future-proof for next-gen components.
Modularity
Both power supplies feature fully modular cabling. The Lian Li SP750 includes fully modular braided cables for a clean look. You can disconnect cables you do not use. The Lian Li RS1000G also offers fully modular cabling. It includes soft flat cables for easier routing. Both units allow you to remove unused connectors. This reduces clutter inside your case. There is no difference in modularity type between the two. You get clean builds with either option. The choice depends on cable style preference rather than functionality.
Efficiency rating
Both units carry the 80 PLUS Gold efficiency certification. This means both convert AC power to DC power with high efficiency. The Lian Li RS1000G also achieves Cybenetics Platinum-level efficiency. It maintains over 90% efficiency under typical loads. The Lian Li SP750 lists Gold certification but no Cybenetics rating. Gold certification is a strong baseline for both. The RS1000G offers slightly better verified efficiency metrics. Both units reduce energy waste and heat output. You save power with either choice, but the RS1000G has extra validation.
Which PSU fits your build needs
Small form factor builders
The SP750 uses the SFX form factor, measuring 4.13 by 7 by 9.5 inches. This compact size fits small cases where space is tight. It delivers 750W of power with 80 PLUS Gold efficiency. Fully modular braided cables help keep your build clean and organized.
High-power modern GPU users
The RS1000G offers 1000W of power and supports ATX 3.1 and PCIe 5.1 standards. It includes native 12V-2x6 cables for modern graphics cards. The dual-color cables ensure safer connections with lower resistance. This unit handles high transient loads for next-generation hardware reliably.
Users wanting long warranty coverage
The RS1000G comes with a 10-year PSU warranty plus a 2-year RS Hub warranty. This provides longer protection than typical units. The 135 mm fan ensures quiet operation under load. The rotatable AC inlet reduces cable strain, making installation easier in various case layouts.
The products compared
Lian Li 750W SFX Gold Power Supply
Best for: small form factor builds needing silence
- 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 measures 4.13 by 7 by 9.5 inches and weighs 2.2 pounds. The unit uses Japanese electrolytic capacitors for durability and features zero RPM mode under 40% load for silent operation. It suits users building small form factor PCs who need reliable power in a compact space.
Pros
- 80 PLUS Gold efficiency rating
- Fully modular braided cables
- Zero RPM fan mode under 40% load
- Japanese electrolytic capacitors
Cons
- Lower 750W wattage compared to 1000W ATX options
- Compact SFX form factor limits airflow in tight cases
- Heavier build at 2.2 pounds for its size
Good fit if
- You are building a small form factor PC
- You need fully modular cables for clean builds
- You prioritize silent operation at low loads
Skip if
- You require maximum 1000W+ power output
- You are using a standard ATX case
- You prefer larger ATX power supplies
Verdict: The Lian Li SP 750 SFX Gold PSU delivers efficient power in a compact SFX frame. It fits small builds where space is tight and silence matters at low loads.
Lian Li 1000W Gold ATX PSU with USB Fan Hub
Best for: High-end ATX builds needing 1000W
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135 mm
View on Amazon: Lian Li 1000W Gold ATX PSU with USB Fan Hub Affiliate link
The Lian Li RS1000G is a 1000W ATX power supply built for high-end builds. It features an ATX 3.1 standard and native 12V-2x6 cables for modern GPUs. The unit includes a 135 mm fan and a USB fan hub. It offers 80 PLUS Gold efficiency and Cybenetics Platinum-level performance. This PSU suits users needing substantial power and flexible cable routing in standard cases.
Pros
- 1000W output with ATX 3.1 and PCIe 5.1 support
- Rotatable 90-degree AC inlet for better cable management
- Cybenetics Platinum-level efficiency rating
- Includes USB fan hub and dual-color 12V-2x6 cables
Cons
- Larger ATX form factor limits fit in small cases
- Heavier build at 7.1 pounds
- Only available in black finish
Good fit if
- You need 1000W for next-gen graphics cards
- You want flexible AC inlet angles for tight spaces
- You prefer standard ATX cases with room for bulk
Skip if
- You require a compact SFX form factor
- You need a white color option
- You are building in a small form factor case
Verdict: Lian Li RS1000G 1000W ATX Gold provides robust power for high-end systems with flexible routing options. It fits users prioritizing efficiency and modern connector standards over compact size.
Specifications side by side
| Spec | Lian Li 750W SFX Gold Power Supply | Lian Li 1000W Gold ATX PSU with USB Fan Hub |
|---|---|---|
| Wattage | 750W | 1000W |
| Efficiency Rating | 80 PLUS GOLD | 80 PLUS Gold |
| Modularity | Fully modular | Fully Modular |
| ATX Version | not stated | ATX 3.1 |
| PCIe Connector Type | not stated | 12V-2x6 |
| Fan Size | not stated | 135 mm |
| Warranty | not stated | 10-Year |
| Form Factor | SFX | ATX |
| PCIe Version | not stated | PCIe 5.1 |
| Connector | not stated | 12V-2x6 Connector |
| Dimensions | 9.5 × 4.13 × 7 inches | 12.8 × 8.19 × 5.15 inches |
| Weight | 2.2 pounds | 7.1 pounds |
| Size | 750W(V1),Black | 1000W,Black |
| Color | Black | Black |
| Model | SP750 | not stated |
Frequently asked questions
Is the Lian Li SP750 SFX Gold suitable for small ITX builds?
Yes, it is designed specifically for small form factor builds where space is limited. The unit measures 4.13 by 7 by 9.5 inches, allowing it to fit into compact chassis. It weighs 2.2 pounds, making it a lightweight option for portable or tight setups.
Can the Lian Li RS1000G ATX replace the SP750 in a small case?
No, the RS1000G is a standard ATX unit and will not fit in cases designed for SFX power supplies. It measures 8.19 by 5.15 by 12.8 inches and weighs 7.1 pounds. You need a case that supports standard ATX dimensions to use this higher-wattage model.
Which PSU is better for high-end gaming rigs requiring 1000W?
The Lian Li RS1000G is the better choice for systems needing 1000W of power. It provides robust output for high-end components. The SP750 only offers 750W, which may not suffice for extreme gaming or workstation builds that demand higher continuous power delivery.
Do both power supplies feature fully modular cabling?
Yes, both units offer fully modular cabling. This allows you to connect only the cables you need, reducing clutter inside your case. This feature helps maintain clean cable routing, which is especially important in compact builds where airflow and space are constrained.
What is the weight difference between the SFX and ATX models?
The RS1000G ATX is significantly heavier than the SP750 SFX. The ATX unit weighs 7.1 pounds, while the SFX model weighs only 2.2 pounds. This 4.9-pound difference reflects the larger internal components and metal casing required for the higher wattage and standard ATX form factor.
Is the Lian Li SP750 Gold efficient for low-load scenarios?
Yes, the SP750 delivers efficient power in a compact frame. It is noted for maintaining silence at low loads. This makes it ideal for users who prioritize quiet operation in small builds, as it balances energy efficiency with acoustic performance during everyday tasks.
Which PSU supports modern connector standards for new graphics cards?
The Lian Li RS1000G ATX is described as supporting modern connector standards. It is aimed at users prioritizing efficiency and up-to-date connectivity for high-end systems. While the SP750 is efficient, the RS1000G is explicitly highlighted for its alignment with modern component requirements.