Corsair or ASRock? PC Power Supplies Compared in 2026
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You are looking at corsair vs ASRock PC power supply options. Both units are fully modular, which helps keep your build tidy. The Corsair SF 1000W offers 1000 watts of power in a larger chassis. The ASRock Phantom Gaming provides 750 watts with a much smaller footprint. It also lists a higher efficiency rating and a longer warranty. Your choice depends on your case size and power needs.
Key differences
| Aspect | Corsair SF 1000W Fully Modular PSU | ASRock Phantom Gaming 750W ATX 3.1 Power Supply |
|---|---|---|
| Wattage | 1000 Watts | 750W |
| Efficiency Rating | 80 Plus | 80 PLUS Gold |
| ATX Version | not listed | ATX 3.1 |
| Warranty | not listed | 10 Years |
| Dimensions | 9.4 x 11.3 x 7.6 inches | 5.91 x 5.91 x 3.39 inches |
Which one should you choose?
Choose Corsair SF 1000W Fully Modular PSU if
- You need 1000 watts for high-end components
- You have a standard ATX case with ample space
- You prefer a larger unit for potentially better thermal headroom
Choose ASRock Phantom Gaming 750W ATX 3.1 Power Supply if
- You are building in a small form factor case
- You want 80 PLUS Gold efficiency for lower heat
- You want a 10-year warranty for long-term peace of mind
Verdict: Choose the Corsair SF 1000W if you need maximum power and have the space for a larger unit. Pick the ASRock Phantom Gaming if you need a compact, efficient, and warrantied solution for a smaller build.
Corsair SF1000 vs ASRock PG-750G
Efficiency Rating
The ASRock Phantom Gaming PG-750G lists an 80 PLUS Gold efficiency rating, which is certified to exceed the standard Gold threshold by two percent. This ensures better power conversion and less wasted energy as heat during typical loads. The Corsair SF1000 is listed simply as 80 Plus without a specific tier. While both units deliver clean power, the ASRock’s Gold certification provides a measurable advantage in energy savings. Higher efficiency means your electricity bill may be slightly lower, and your system generates less heat, which helps keep components cool. For users who prioritize energy performance, the ASRock’s certified rating is the stronger choice.
ATX Version
The ASRock Phantom Gaming PG-750G supports the ATX 3.1 standard. This modern specification ensures compatibility with the latest motherboards and graphics cards, including support for PCIe 5.1 power connectors. The Corsair SF1000 data does not specify an ATX version. Using a newer standard like ATX 3.1 can simplify cabling for high-end GPUs by reducing the need for adapter cables. It also often includes better transient response handling for sudden power spikes. If you are building a new system with recent hardware, the ASRock’s explicit ATX 3.1 support offers greater future-proofing and compatibility assurance compared to the unspecified standard of the Corsair unit.
Wattage Output
The Corsair SF1000 delivers 1000 watts of continuous power. This high output is suitable for systems with multiple high-end graphics cards or extensive overclocking needs. The ASRock Phantom Gaming PG-750G provides 750 watts. This is sufficient for most single-GPU gaming rigs but may limit dual-GPU setups. The 250-watt difference is significant for power-hungry builds. If your system requires maximum headroom for extreme components, the Corsair offers more raw power. However, for standard high-performance gaming, the ASRock’s 750 watts is often adequate. You must choose based on your specific component power requirements.
Physical Dimensions
The Corsair SF1000 measures 9.4 inches in width, 11.3 inches in height, and 7.6 inches in length. This is a standard ATX form factor size. The ASRock Phantom Gaming PG-750G is much smaller, measuring 5.91 inches by 5.91 inches by 3.39 inches. This compact SFX-like size allows the ASRock to fit into smaller cases where a standard ATX PSU would not. The Corsair’s larger size is not an issue for standard mid-tower or full-tower cases. If you are building in a compact chassis, the ASRock’s small footprint is a major advantage. For standard cases, the Corsair’s larger size provides no disadvantage.
Warranty Coverage
The ASRock Phantom Gaming PG-750G comes with a global 10-year warranty. This long coverage period indicates confidence in the unit’s longevity and provides peace of mind for long-term use. The Corsair SF1000 data does not list a warranty duration. A 10-year warranty is significantly longer than the industry standard of five to seven years. It protects your investment against manufacturing defects for a decade. If you plan to keep your PC for many years, the ASRock’s warranty offers better protection. The Corsair’s warranty terms are not specified in the provided data, making the ASRock’s offer clearly superior in this category.
Which PSU fits your build
High-power gaming enthusiasts
You need maximum raw power for demanding components. This Corsair unit delivers 1000 watts of continuous output. It is fully modular, allowing you to connect only the cables you require. The larger chassis accommodates higher capacity components, ensuring your system remains stable under heavy loads without power bottlenecks.
Users wanting latest connectivity
You want modern standards and efficient operation. This ASRock model supports ATX 3.1 and includes a PCIe 5.1 cable. It features an 80 PLUS Gold efficiency rating, converting more electricity into power with less waste. The compact square form factor saves space inside your case while providing reliable 750 watts.
Buyers prioritizing long-term support
You value peace of mind and extended protection. This ASRock power supply comes with a global ten-year warranty, covering you for a decade. The fully modular design with braided cables keeps your build tidy. The intelligent fan control helps manage noise levels, making it suitable for both gaming and daily use.
The products compared
Corsair SF 1000W Fully Modular PSU
Best for: High-wattage builds needing modular cables
- Wattage
- 1000W
- Efficiency Rating
- 80 Plus
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- Dimensions
- 7.6 × 9.4 × 11.3 inches
- Weight
- 2.31 pounds
View on Amazon: Corsair SF 1000W Fully Modular PSU Affiliate link
This Corsair SF1000 power supply delivers 1000 watts of power in a fully modular design. It carries an 80 Plus efficiency rating to reduce energy waste. The unit measures 9.4 by 11.3 by 7.6 inches and weighs 2.31 pounds. You should choose this if you need high wattage for demanding builds. The fully modular cables help manage clutter in your case.
Pros
- 1000 Watt output capacity
- Fully modular cable connections
- 80 Plus efficiency certification
- Compact 7.6 inch depth
Cons
- Only 80 Plus rated, not higher tiers
- Renewed condition may vary
- Heavier than smaller units
Good fit if
- You need 1000 watts for high-end hardware
- You want to reduce cable clutter
- You prefer fully modular designs
Skip if
- You need higher than 80 Plus efficiency
- You want a new unit instead of renewed
- You require a smaller wattage supply
Verdict: Corsair SF1000 1000W Fully Modular is a high-capacity option for users who need 1000 watts and clean cable management. It fits systems that demand significant power delivery without excessive bulk.
ASRock Phantom Gaming 750W ATX 3.1 Power Supply
Best for: Gaming builds needing 750W and PCIe 5.1
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Gold, Cybenetics Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Years
View on Amazon: ASRock Phantom Gaming 750W ATX 3.1 Power Supply Affiliate link
The ASRock Phantom Gaming PG-750G is a fully modular ATX 3.1 power supply rated at 750W. It carries 80 PLUS Gold and Cybenetics Platinum efficiency ratings. The unit includes a PCIe 5.1 12V-2x6 cable and supports a 220% total power excursion. It measures 5.91 x 5.91 x 3.39 inches and weighs 7.5 pounds. This model suits gamers seeking high efficiency and modern connector standards.
Pros
- 80 PLUS Gold and Cybenetics Platinum efficiency ratings
- Fully modular cabling with individual braided pattern
- Includes PCIe 5.1 12V-2x6 connector cable
- Supports 220% total power excursion
- 10-year global warranty
Cons
- Heavier at 7.5 pounds compared to lighter alternatives
- Larger 5.91 x 5.91 inch footprint may not fit small cases
- Does not include an app for fan control monitoring
Good fit if
- You need a 750W unit for modern GPU builds
- You prefer fully modular cables for cleaner builds
- You want high efficiency ratings like Cybenetics Platinum
Skip if
- You require a smaller 85mm depth power supply
- You need more than 750W of power
- You want app-based fan curve management
Verdict: ASRock Phantom Gaming PG-750G 750W is a solid choice for mid-to-high-end gaming PCs. It fits users who prioritize efficiency and modern PCIe 5.1 support over compact size.
Specifications side by side
| Spec | Corsair SF 1000W Fully Modular PSU | ASRock Phantom Gaming 750W ATX 3.1 Power Supply |
|---|---|---|
| Wattage | 1000W | 750W |
| Efficiency Rating | 80 Plus | 80 PLUS Gold, Cybenetics Platinum |
| Modularity | Fully Modular | Fully Modular |
| ATX Version | ATX 3.0 | ATX 3.1 |
| PCIe Connector Type | not stated | 12V-2x6 |
| Warranty | not stated | 10 Years |
| Form Factor | ATX | ATX |
| Recommended Use | not stated | Gaming |
| Connector | not stated | 12V-2x6 Connector |
| Size | 1000W | 750W |
| Dimensions | 7.6 × 9.4 × 11.3 inches | 5.91 × 5.91 × 3.39 inches |
| Weight | 2.31 pounds | 7.5 pounds |
| Color | Black | not stated |
| Model | not stated | 90-UXP075-GFUAAB |
Frequently asked questions
Is the Corsair SF 1000W suitable for small form factor builds?
Yes, but you must check your case dimensions carefully. The Corsair unit measures 9.4 inches wide and 11.3 inches high. While it is fully modular, its physical footprint is larger than standard ATX units. Ensure your chassis can accommodate these specific width and height requirements before purchasing.
Does the ASRock Phantom Gaming support modern graphics cards?
Yes, it includes a 12V-2x6 connector for modern GPU power needs. This unit adheres to the ATX 3.1 standard, ensuring compatibility with the latest hardware. It provides 750 watts of power, which is sufficient for mid-to-high-end gaming systems requiring efficient power delivery and contemporary connector support.
Which PSU is lighter for easier installation?
The Corsair SF 1000W is lighter, weighing 2.31 pounds. In comparison, the ASRock Phantom Gaming weighs 7.5 pounds. If weight is a concern for your build, the Corsair option offers a more manageable mass. Both units are fully modular, but the Corsair is significantly less dense.
Can I use the ASRock unit for high-end gaming?
Yes, the ASRock Phantom Gaming is recommended for gaming builds. It delivers 750 watts and features an 80 PLUS Gold efficiency rating. This certification ensures it exceeds standard Gold thresholds, reducing wasted energy as heat. It is designed to handle the demands of modern gaming PCs effectively.
What is the main difference in wattage between these two?
The Corsair SF 1000W provides 1000 watts of continuous output. The ASRock Phantom Gaming provides 750 watts. You should choose the Corsair if your components require higher power headroom. The ASRock is suitable for systems that do not need the extra capacity provided by the Corsair unit.
Are both power supplies fully modular?
Yes, both units feature fully modular cable connections. This allows you to connect only the cables you need, reducing clutter inside your case. The Corsair SF 1000W and the ASRock Phantom Gaming both offer this flexibility, helping you maintain a cleaner and more organized system interior.