Thermaltake PS-STP-0850FNFAGU-1

Overview

The Thermaltake PS-STP-0850FNFAGU-1 is an 850 watt SFX power supply designed to deliver reliable and efficient power in a compact form factor. It meets Intel ATX 3.0 standards and supports PCIe 5.0 graphics cards with a native 12+4 pin 12VHPWR connector capable of delivering up to 450 watts directly to the GPU. This power supply is ideal for builders who want a high-performance unit that fits into small cases without sacrificing power or future-proofing.

Key features

• Compliance with Intel ATX 3.0 specification ensures compatibility with the latest PC hardware standards.
• Native 12VHPWR cable supports PCIe 5.0 graphics cards, allowing direct connection without adapters for up to 450 watts.
• Fully modular design lets you connect only the cables you need, reducing clutter and improving airflow inside the case.
• Flat cable design maintains a low profile to keep internal airflow unobstructed and improve cooling efficiency.
• Smart Zero Fan technology stops the fan during light workloads, keeping noise levels below 29.8 decibels for quiet operation.
• Durable 100 percent Japanese capacitors rated for 105°C provide long-term stability and reliability under heavy loads.
• Includes an SFX to ATX adapter bracket, allowing flexible installation in both Mini ITX and mid-tower cases as your build evolves.

Key specs

• Power output: 850 watts
• Efficiency rating: 80 PLUS Gold
• Fan size and type: 92 mm Fluid Dynamic Bearing fan
• Noise level: under 29.8 dB with Smart Zero Fan technology
• Connector: native 12+4 pin 12VHPWR for PCIe 5.0 graphics cards
• Capacitors: 100% Japanese, rated for 105°C
• Form factor: SFX with included ATX adapter bracket

Connectivity and compatibility

This power supply is designed to work seamlessly with the latest generation of graphics cards thanks to its native 12VHPWR connector, which supports PCIe 5.0 standards. The fully modular cable system allows you to customize your setup by attaching only the cables required for your components, reducing clutter and improving airflow. The included SFX to ATX adapter bracket expands compatibility, making it easy to install in a variety of case sizes from compact Mini ITX builds to larger mid-tower systems.

Performance and reliability

With an 80 PLUS Gold efficiency rating, this power supply minimizes wasted energy and heat generation, contributing to a more stable and efficient system. The use of high-quality Japanese capacitors rated for 105°C ensures durability and consistent performance even during extended gaming sessions or demanding workstation tasks. The 92 mm Fluid Dynamic Bearing fan operates quietly and efficiently, while Smart Zero Fan technology halts fan operation during low loads to maintain a silent environment.

Ideal uses and environments

This power supply is well suited to PC builders who require a compact unit without compromising on power or future compatibility. It fits perfectly in small form factor cases used for gaming, content creation, or professional workstations. Its support for PCIe 5.0 graphics cards and modular design make it a strong choice for users planning to upgrade their GPU or who want a clean, efficient build with quiet operation.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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