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Seasonic Vertex GX-1200 1200W 80 PLUS Gold ATX 3.1 PCIe 5.1 Fully Modular Power Supply

Seasonic Vertex GX-1200 1200W 80 PLUS Gold ATX 3.1 PCIe 5.1 Fully Modular Power Supply

The Seasonic Vertex GX-1200 delivers high-capacity, stable power designed specifically for next-generation hardware requiring ATX 3.1 and PCIe 5.1 standards. Featuring a native 12V-2x6 cable and a 135mm Fluid Dynamic Bearing fan, it provides a reliable and quiet solution for power-hungry GPUs and hi


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Description

The Seasonic Vertex GX-1200 represents a significant evolution in power delivery, engineered to meet the rigorous demands of modern high-performance computing. As hardware transitions toward the ATX 3.1 and PCIe 5.1 standards, this 1200W unit provides the necessary headroom and specialized connectivity to handle massive power spikes and sustained loads. With its 80 PLUS Gold efficiency and Cybenetics Gold rating, it ensures minimal energy waste while maintaining peak performance for enthusiast-grade builds.


This product is for:
- Extreme Gamers: Ideal for users running flagship GPUs like the NVIDIA GeForce RTX 4090 or upcoming 50-series cards that require native 12V-2x6 power delivery.
- Professional Content Creators: Provides stable, continuous 1200W output for multi-core CPUs and high-end rendering workstations.
- PC Enthusiasts & Overclockers: Features high-quality components and tight voltage regulation to support pushed hardware limits.
- Long-term System Builders: Backed by a 12-year warranty, making it a foundational component for multiple upgrade cycles.
- Silent Build Specialists: Utilizes a 135mm FDB fan and Digital Hybrid Fan Control to maintain near-silent operation under light to moderate loads.

Detailed specifications:
- Total Power Output: 1200W Continuous
- Efficiency Ratings: 80 PLUS Gold, Cybenetics Gold
- Standards Compliance: ATX 3.1, PCIe 5.1
- Native GPU Connector: 1x 12V-2x6 cable included
- Cooling System: 135mm Fluid Dynamic Bearing (FDB) Fan with Hybrid Silent Control
- Dimensions: 160mm (L) x 150mm (W) x 86mm (H)
- Cable Management: Fully Modular with braided pattern cables
- Safety Protections: OPP, OVP, UVP, SCP, OCP, OTP
- MTBF: 100,000 hours at 25°C (excluding fan)

Operating the Vertex GX-1200 is a seamless experience for both builders and daily users. The 160mm depth ensures compatibility with a wide range of mid-tower and full-tower cases, while the fully modular, braided cables simplify routing and improve airflow. The Digital Hybrid Fan Control allows the unit to remain in a fanless mode during low-load tasks, such as web browsing or office work, only spinning up when the system demands more power. This balance of thermal management and acoustic performance makes it one of the most unobtrusive high-wattage units on the market.

Compared to previous generation ATX 2.4 power supplies, the Vertex GX-1200 offers superior transient response and includes the native 12V-2x6 cable, eliminating the need for cumbersome and potentially risky 8-pin adapters. While the Seasonic Prime series offers Platinum or Titanium efficiency, the Vertex GX series serves as the optimal 'sweet spot,' providing the latest ATX 3.1 safety features and high wattage at a more accessible price point without sacrificing the legendary Seasonic build quality or the industry-leading 12-year warranty.

Q&A:
- Is the Seasonic Vertex GX-1200 compatible with the RTX 4090? Yes, it includes a native 12V-2x6 cable designed specifically for high-power PCIe 5.1 graphics cards.
- What is the benefit of ATX 3.1 over ATX 3.0? ATX 3.1 introduces the refined 12V-2x6 connector, which offers improved safety and better contact compared to the original 12VHPWR design.
- Does this power supply fit in a standard ATX case? Yes, with a length of 160mm, it fits in most modern ATX chassis, though checking your case's PSU clearance is always recommended.
- How quiet is the fan during gaming? Thanks to the 135mm FDB fan and Hybrid Silent Fan Control, the unit remains very quiet, only increasing fan speed as the internal temperature rises under heavy load.
- What does the 12-year warranty cover? The warranty covers any defects in materials or workmanship, reflecting Seasonic's confidence in the unit's long-term durability and high-quality internal components.
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