EVGA vs Seasonic: PC Power Supplies Compared by Specs
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This EVGA vs seasonic PC power supply comparison looks at two distinct units. Both brands prioritize reliability, using high-quality components to ensure stable power delivery for your system. The main difference lies in their target use cases. The EVGA unit is a mid-range modular supply, while the Seasonic model is a compact, industrial-grade unit. You need to choose based on your case size and wattage needs.
Key differences
| Aspect | EVGA SuperNOVA 750W Bronze Power Supply | Seasonic 300W Flex ATX Gold Power Supply |
|---|---|---|
| Wattage | 750W | 300W |
| Efficiency Rating | 80PLUS Bronze | 80 PLUS Gold |
| Modularity | Hybrid Modular | Not listed |
| Form Factor | ATX | Flex ATX |
| PFC | Not listed | Active PFC |
Which one should you choose?
Choose EVGA SuperNOVA 750W Bronze Power Supply if
- You need higher wattage for a standard desktop build
- You want to reduce cable clutter with modular connections
- You are using a standard ATX case
Choose Seasonic 300W Flex ATX Gold Power Supply if
- You are building in a small form factor case
- You prioritize higher energy efficiency under load
- You require industrial-grade safety and EMI standards
Verdict: The EVGA unit suits standard desktops needing more power and cleaner cable management. The Seasonic model is better for compact builds where space and efficiency are critical. Your choice depends entirely on your chassis size and power requirements.
EVGA vs Seasonic PSU Specs Compared
efficiency rating
Efficiency matters for your electricity bill and heat output. The EVGA SuperNOVA 750W Bronze Power Supply holds an 80PLUS Bronze certification. It reaches up to 85% efficiency under typical loads. The Seasonic 300W Flex ATX Gold Power Supply is 80 PLUS Gold rated. At 50% load with 115 V AC input, it achieves up to 90% efficiency. Gold certification generally means better performance than Bronze. This gives you lower wasted energy and less heat inside your case. The Seasonic unit pulls ahead here due to its higher tier certification.
wattage output
Power delivery defines what hardware you can run. The EVGA unit provides 750W of total power. This supports high-end graphics cards and multiple drives. The Seasonic supply offers only 300W. This lower output suits basic office PCs or small form factor builds with low-power components. You cannot run a gaming rig on the Seasonic unit. The EVGA supply clearly wins for anyone needing substantial power for modern components. Higher wattage gives you more headroom for upgrades.
form factor
Physical size determines case compatibility. The EVGA model follows standard ATX dimensions. It measures 7.1 inches in length, 5.9 inches in width, and 3.4 inches in height. The Seasonic unit uses a Flex ATX form factor. This is a non-standard, smaller size designed for specific compact chassis. You must check your case supports Flex ATX before buying the Seasonic. The EVGA unit fits in almost any standard mid-tower or full-tower case. Standard sizing makes the EVGA more versatile for general builders.
modularity
Cable management affects airflow and aesthetics. The EVGA SuperNOVA features a Hybrid Modular design. You only connect the cables your system actually needs. This reduces clutter inside your case and improves airflow. The Seasonic data does not list modularity specifications. It appears to be a fixed-cable unit based on its industrial design description. Fixed cables can create more mess in tight spaces. The EVGA hybrid modularity gives you cleaner builds and easier maintenance.
protection features
Safety circuits protect your expensive components. The EVGA unit lists heavy-duty protections. These include OVP, UVP, OCP, OPP, SCP, and OTP. This covers over voltage, under voltage, over current, over power, short circuit, and over temperature scenarios. The Seasonic data mentions important protection features but does not list them specifically. It notes compliance with safety standards. The EVGA provides transparent details on its safety mechanisms. You know exactly what safeguards are in place. This clarity gives the EVGA an edge for peace of mind.
Which PSU matches your build needs
Users needing high wattage for standard builds
The EVGA SuperNOVA 750W Bronze Power Supply provides 750W of power. It features a hybrid modular design to reduce clutter. Japanese capacitors ensure long-term reliability. The 2-ball bearing fan offers near-silent operation. This unit suits systems requiring substantial power delivery with efficient 80PLUS Bronze certification under typical loads.
Small form factor builds requiring high efficiency
The Seasonic 300W Flex ATX Gold Power Supply is ideal for compact cases. It delivers 300W with 80 PLUS Gold efficiency, reaching up to 90% at 50% load. Active PFC improves power factor correction. It meets ATX 12 V v 2 31 standards. This industrial-grade unit ensures stable power for smaller configurations.
Builders prioritizing maximum efficiency ratings
If efficiency is your priority, the Seasonic unit stands out with 80 PLUS Gold certification. It achieves up to 90% efficiency at 50% load on 115 V AC input. This reduces heat output and electricity usage. The Active PFC design further enhances performance. It is a better choice than Bronze for energy-conscious users.
The products compared
EVGA SuperNOVA 750W Bronze Power Supply
Best for: Mid-range builds needing 750W
- Wattage
- 750W
- Efficiency Rating
- 80PLUS Bronze
- Modularity
- Hybrid Modular
- Dimensions
- 7.1 × 5.9 × 3.4 inches
- Weight
- 7 pounds
View on Amazon: EVGA SuperNOVA 750W Bronze Power Supply Affiliate link
The EVGA SuperNOVA NEX750B delivers 750W of power with 80 PLUS Bronze efficiency. It uses a hybrid modular design to reduce cable clutter. Japanese capacitors support long-term reliability. A 2-ball bearing fan ensures quiet operation. This unit suits users needing stable power for mid-range builds without the cost of full modularity or higher efficiency ratings.
Pros
- 750W output capacity
- 80 PLUS Bronze efficiency rating
- Hybrid modular design
- Japanese brand capacitors
Cons
- Bronze efficiency is lower than Gold options
- Hybrid modularity leaves some cables fixed
- Heavier at 7 pounds
Good fit if
- You need 750W for mid-range components
- You want reliable Japanese capacitors
- You prefer hybrid modularity
Skip if
- You require full modularity
- You need 80 PLUS Gold efficiency
- You want a lighter unit
Verdict: EVGA SuperNOVA NEX750B 750W is a solid choice for builders who need reliable 750W output with hybrid modularity. It fits users who prioritize component quality over maximum efficiency ratings.
Seasonic 300W Flex ATX Gold Power Supply
Best for: Compact builds needing high efficiency
- Wattage
- 300W
- Efficiency Rating
- 80 PLUS Gold
- ATX Version
- ATX 12 V v 2 31
- Power Factor Correction
- Active PFC
View on Amazon: Seasonic 300W Flex ATX Gold Power Supply Affiliate link
This Seasonic unit delivers 300W of power in a Flex ATX form factor. It carries an 80 PLUS Gold efficiency rating and includes Active PFC. The design meets ATX 12V v2.31 and EPS 12V standards. It suits users needing a reliable, efficient power source for small form factor builds or industrial applications where space is tight but performance matters.
Pros
- 80 PLUS Gold efficiency rating
- Active PFC circuit design
- ATX 12V v2.31 compliant
- EPS 12V compliant
Cons
- Low 300W wattage limits high-power components
- Flex ATX size restricts case compatibility
- Multicolor LED may not suit all aesthetics
Good fit if
- You need a small form factor power supply
- You prioritize high efficiency over raw power
- You require EPS 12V compliance for specific motherboards
Skip if
- You plan to use high-end gaming GPUs
- You need standard ATX size for larger cases
- You require more than 300W of total power
Verdict: Seasonic 300W Gold Flex ATX PSU offers high efficiency in a compact package. It fits small builds requiring reliable power delivery, not high-performance gaming rigs.
Specifications side by side
| Spec | EVGA SuperNOVA 750W Bronze Power Supply | Seasonic 300W Flex ATX Gold Power Supply |
|---|---|---|
| Wattage | 750W | 300W |
| Efficiency Rating | 80PLUS Bronze | 80 PLUS Gold |
| Modularity | Hybrid Modular | not stated |
| ATX Version | not stated | ATX 12 V v 2 31 |
| Power Factor Correction | not stated | Active PFC |
| Dimensions | 7.1 × 5.9 × 3.4 inches | not stated |
| Weight | 7 pounds | not stated |
| Color | Black | Multicolor |
| Model | 120-PB-0750-KR | SSP-300SUG |
Frequently asked questions
Which PSU is better for a small form factor build?
The Seasonic 300W Flex ATX Gold Power Supply is the better choice for compact cases. It is designed specifically for small builds requiring reliable power delivery in a tight space. The EVGA unit is larger and suited for standard mid-range towers, not mini-ITX or micro-ATX chassis.
Does the EVGA unit have a modular design?
Yes, the EVGA SuperNOVA 750W Bronze Power Supply features a hybrid modular design. This allows you to connect only the cables you need, reducing cable clutter inside your case. The Seasonic model listed does not specify modularity in its attributes, so check its manual for cable management options.
How much power does the EVGA supply provide?
The EVGA SuperNOVA 750W Bronze Power Supply provides 750W of continuous power. This output is ideal for mid-range builds that need reliable wattage for standard components. It is not designed for extreme high-performance gaming rigs that require significantly higher power draws than 750W.
Is the Seasonic unit efficient for low power systems?
Yes, the Seasonic 300W Flex ATX Gold Power Supply offers high efficiency with an 80 Plus Gold certification. It also includes Active PFC for better power factor correction. This makes it suitable for users prioritizing energy savings and stable voltage in lower wattage applications.
What are the physical dimensions of the EVGA PSU?
The EVGA SuperNOVA 750W Bronze Power Supply measures 7.1 inches in length, 5.9 inches in width, and 3.4 inches in height. It weighs 7 pounds. These dimensions fit standard ATX cases. Ensure your chassis has enough space to accommodate this form factor before purchasing.
Which brand focuses on component quality over efficiency ratings?
EVGA positions its SuperNOVA NEX750B as a choice for builders who prioritize component quality over maximum efficiency ratings. It uses Japanese capacitors for long-term reliability. Seasonic, conversely, highlights its Gold efficiency and compact Flex ATX form factor as its primary selling points in this comparison.