SAMA White 650W Power Supply - Fully Modular 80 vs Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe
Updated August 2026 — SAMA White 650W Power Supply - Fully Modular 80 wins on price, Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe wins on warranty and weight.
The Seasonic Focus GX 850W offers superior efficiency and warranty, making it a better long-term investment despite its higher price.
Why SAMA White 650W Power Supply - Fully Modular 80 is better
lower price
SAMA White is $62.99 compared to $139.99
modular design
Both are fully modular, but SAMA emphasizes cable management
lightweight
SAMA White is lighter than Seasonic Focus GX
Why Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe is better
higher efficiency
Seasonic Focus GX has Cybenetics Platinum certification
longer warranty
Seasonic offers a 10-year warranty versus SAMA's 5-year
better cooling
Seasonic has a larger 135mm fan for improved cooling
Overall score
Specifications
| Spec | SAMA White 650W Power Supply - Fully Modular 80 | Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe |
|---|---|---|
| Power Output | 650W | 850W |
| Modularity | Fully Modular | Fully Modular |
| Certification | 80 PLUS Gold | 80 PLUS Gold & Platinum |
| Fan Size | 120mm | 135mm |
| Connector Type | PCIe 5.1 | 12V-2x6 |
Dimension comparison
Overview of Power Supplies
When choosing between the SAMA White 650W Power Supply and the Seasonic Focus GX 850W Power Supply, it's essential to consider compatibility, efficiency, and price. The SAMA White is priced at $62.99, making it about 55% less expensive than the Seasonic Focus GX, which retails for $139.99. This significant price difference can impact budget-conscious buyers looking for reliable power supply options.
Design and Modularity
Both power supplies feature a fully modular design, allowing users to connect only the cables necessary for their builds. The SAMA White boasts streamlined cable management with flat cables that help maintain a clean look and improve airflow. In contrast, the Seasonic Focus GX also emphasizes modularity but includes an OptiSink Design that enhances stability and efficiency. This design choice can be particularly appealing for those who prioritize aesthetics and performance in their builds.
Compatibility with Modern Standards
The SAMA White supports the latest ATX 3.1 standards and is PCIe 5.1 compliant, making it suitable for high-end graphics cards like the RTX 30 and 40 series. Meanwhile, the Seasonic Focus GX is also ATX 3.1 and PCIe 5.1 ready, with a native 12V-2x6 connector. Both power supplies ensure compatibility with the latest hardware, but the SAMA's focus on supporting a broader range of GPUs may be a deciding factor for some users.
Efficiency and Certifications
Efficiency is crucial in power supplies, and both units carry impressive certifications. The SAMA White is 80 PLUS Gold certified, achieving up to 91.15% efficiency at 50% load, while the Seasonic Focus GX boasts an even higher standard with both 80 PLUS Gold and Cybenetics Platinum certifications. This means that while the SAMA White is efficient, the Seasonic's higher rating indicates it wastes less energy, making it potentially more cost-effective in the long run despite its higher upfront price.
Cooling Solutions
Cooling performance is essential for maintaining system stability during heavy loads. The SAMA White is equipped with a 120mm ECO fan featuring Fluid Dynamic Bearing technology, which ensures quiet operation, typically around ≤20dB-A. The Seasonic Focus GX utilizes a 135mm FDB fan with hybrid fan control, which may provide better cooling performance when needed. This could be a critical factor for users in high-temperature environments or those pushing their systems to the limit.
Warranty and Reliability
Warranty coverage can be a significant aspect of purchasing a power supply. The SAMA White comes with a 5-year warranty, providing a reasonable assurance of reliability. On the other hand, the Seasonic Focus GX offers an impressive 10-year warranty, reflecting the brand's confidence in its product's longevity and reliability. For users who plan to invest in their systems long-term, the additional years of coverage with the Seasonic may be worth the extra cost.
Brand Reputation and Reviews
Brand reputation plays a significant role in consumer choice. SAMA is known for providing budget-friendly options that cater to gamers and general users alike. However, Seasonic has built a strong reputation over the years for high-quality power supplies, particularly in the enthusiast market. The trust and credibility associated with Seasonic may lead some buyers to prefer the Focus GX despite its higher price.
Which should you buy?
In conclusion, the choice between the SAMA White 650W Power Supply and the Seasonic Focus GX 850W Power Supply comes down to specific needs and budget considerations. If you're looking for a more affordable option that still meets modern standards, the SAMA White at $62.99 is an excellent choice. However, if you prioritize efficiency, longer warranty coverage, and brand reputation, the Seasonic Focus GX at $139.99 may justify its higher price. Each power supply has its strengths, making them suitable for different types of users and builds. Ultimately, your decision should align with your priorities, whether that be budget, performance, or peace of mind.

