vsversusfinder

Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe vs Seasonic VERTEX GX-1200 - 1200W - 80+ Gold - ATX

Updated August 2026 — Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe wins on price, Seasonic VERTEX GX-1200 - 1200W - 80+ Gold - ATX wins on power and warranty.

The Seasonic VERTEX GX-1200 offers superior power output and features, making it ideal for high-performance systems, while the Focus GX 850W is a more budget-friendly option for mid-range builds.

Why Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe is better

Price

Focus GX 850W is more affordable at $139.99

Efficiency

Focus GX 850W has Cybenetics Platinum certification

Size

Focus GX 850W is suitable for mid-range setups

Why Seasonic VERTEX GX-1200 - 1200W - 80+ Gold - ATX is better

Power Output

VERTEX GX-1200 provides 1200W compared to 850W

Warranty

VERTEX GX-1200 has a 12-year warranty

Cooling Features

VERTEX GX-1200 includes Hybrid Silent Fan Control

Overall score

Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe
75
Seasonic VERTEX GX-1200 - 1200W - 80+ Gold - ATX
85

Specifications

SpecSeasonic Focus GX 850W Power Supply ATX 3.1 PCIeSeasonic VERTEX GX-1200 - 1200W - 80+ Gold - ATX
Power Output850W1200W
Efficiency Rating80 PLUS Gold80 PLUS Gold
Warranty10 years12 years
ModularityFully ModularFully Modular
Cooling TypeHybrid Fan ControlHybrid Silent Fan Control

Dimension comparison

Seasonic Focus GX 850W Power Supply ATX 3.1 PCIeSeasonic VERTEX GX-1200 - 1200W - 80+ Gold - ATX

Overview of the Seasonic Focus GX 850W and Seasonic VERTEX GX-1200

The Seasonic Focus GX 850W is priced at $139.99, while the Seasonic VERTEX GX-1200 is more expensive at $239.99, making it about 71% costlier. Both power supplies are manufactured by Seasonic, a well-respected brand in the power supply market, but they cater to different needs and preferences. The Focus GX 850W is designed for users looking for a reliable, high-efficiency power supply for mid-range setups, while the VERTEX GX-1200 targets enthusiasts requiring more power for high-performance systems.

Power Output Comparison

When it comes to power output, the Seasonic VERTEX GX-1200 surpasses the Focus GX 850W significantly, providing 1200W compared to the 850W of the Focus model. This additional capacity allows the VERTEX to support more demanding components, making it suitable for high-end gaming rigs or workstations with multiple graphics cards. On the other hand, the Focus GX 850W is ideal for standard gaming setups or builds requiring less power, making it a more suitable choice for average users not pushing their systems to the limit.

Efficiency Ratings

The Seasonic Focus GX 850W holds an 80 PLUS Gold certification, while the VERTEX GX-1200 also has an 80 PLUS Gold rating. Both models provide high efficiency, ensuring less power loss and lower electricity bills. However, the Focus GX 850W is Cybenetics Platinum certified, which indicates an even higher efficiency level under real-world operating conditions compared to standard 80 PLUS Gold-rated supplies. This distinction makes the Focus model potentially more efficient in typical usage scenarios, appealing to users who value energy savings.

Compatibility with Modern Standards

The Focus GX 850W is compatible with ATX 3.1 and PCIe 5.1 standards, making it ready for the latest hardware, including the NVIDIA RTX 5080 and AMD RX 9000 series graphics cards. In contrast, the VERTEX GX-1200 supports ATX 3.0 and PCIe 5.0 standards, which may limit its compatibility with certain next-gen components. However, the VERTEX includes an added 12VHPWR cable to accommodate new graphic cards, making it future-proof for high-performance builds. Users must consider which specifications align better with their planned component choices.

Modularity and Cable Management

Both the Seasonic Focus GX 850W and VERTEX GX-1200 are fully modular, allowing for optimal cable management. This feature enables users to connect only the cables they need, reducing clutter within the case and improving airflow. While both models utilize a 135 mm fan for cooling, the VERTEX GX-1200 boasts the Seasonic Hybrid Silent Fan Control, which helps ensure quieter operation under varying loads. Users who prioritize a silent build may find the VERTEX more appealing, while those who prefer a straightforward, efficient power supply might opt for the Focus model.

Build Quality and Longevity

The Focus GX 850W comes with a 10-year warranty, whereas the VERTEX GX-1200 is backed by a slightly longer 12-year warranty. This difference in warranty duration suggests that Seasonic has higher confidence in the durability and reliability of the VERTEX model. Both power supplies utilize high-quality components, but the VERTEX’s premium Japanese capacitors may offer enhanced longevity and performance stability. Users with long-term reliability in mind might lean toward the VERTEX GX-1200 for its extended warranty and superior build quality.

Cooling Solutions

Cooling solutions are critical in power supplies, particularly for high-performance systems. The Seasonic Focus GX 850W features a hybrid fan control with a 135 mm FDB fan, which provides effective cooling with a focus on noise reduction. In comparison, the VERTEX GX-1200 also incorporates a 135 mm Fluid Dynamic Bearing fan along with Seasonic's Hybrid Silent Fan Control, designed for optimal cooling efficiency. Both options deliver low noise levels, but the VERTEX's additional features may provide better performance in demanding scenarios, making it more suitable for high-stress applications.

Which should you buy?

Choosing between the Seasonic Focus GX 850W and the VERTEX GX-1200 ultimately depends on your specific needs and budget. If you require a robust power supply for a high-end system, the VERTEX GX-1200 offers superior power output, an extended warranty, and advanced cooling features, but at a significantly higher price of $239.99. Conversely, the Focus GX 850W is a more economical choice at $139.99, still providing excellent efficiency and modularity for mid-range builds. Evaluate your power needs and budget to decide which power supply best fits your requirements.