ASUS TUF-GAMING-850G-EVO 850W ATX PSU Black
£125.49 inc VAT
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About This Item
- ASUS TUF-GAMING-850G-EVO 850 W PSU with 90YE00SA-B0NA00 MPN
- ATX 3.1 compatible with PCIe Gen 5.1 support
- 80 PLUS Gold certification for high power efficiency
- Fully-modular cabling with 16-pin, 6+2 pin, and 4+4 pin connectors
- Active cooling with 1 fan and protective PCB coating
- Check motherboard and GPU power requirements before purchase
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ASUS TUF-GAMING-850G-EVO | 850W ATX 3.1 Gold PSU
The ASUS TUF-GAMING-850G-EVO power supply unit 850 W 20+4 pin ATX ATX Black delivers reliable power for modern PC gaming builds. This unit targets builders seeking durable components with high efficiency. It offers 80 PLUS Gold certification and ATX 3.1 compliance for next-gen hardware support.
Technical Overview
This PSU combines military-grade components with a fully modular design. It features active PFC and a single 135mm fan for cooling. The unit measures 140 x 86 x 150 mm, fitting standard ATX cases. Its 850W capacity suits high-performance gaming rigs.
Slim Specifications
| Metric | Spec. |
|---|---|
| Total Power | 850 W |
| Efficiency | 80 PLUS Gold |
| ATX Version | 3.1 |
| Cabling | Fully-Modular |
| PCIe 16-pin | 1x (50 cm cable) |
| SATA Connectors | 4x |
ATX 3.1 and PCIe 5.1 Compliance
The PSU meets ATX 3.1 guidelines. It handles power excursions common with modern GPUs. Because it includes a 16-pin PCIe cable, it supports PCIe Gen 5.1 graphics cards directly. This ensures compatibility with the latest hardware releases.
Durable Component Selection
Military-grade capacitors are used throughout the design. These components provide premium durability under sustained loads. A protective PCB coating shields against moisture and dust. This construction extends the unit’s operational lifespan significantly.
Efficient Cooling and Noise
An active cooling system uses a single ball-bearing fan. This design can last up to twice as long as sleeve bearings. The top-mounted fan location optimises airflow within the case. Active PFC improves power factor correction for stable voltage regulation.
Comprehensive Protection Features
The unit includes multiple protection circuits. These cover overcurrent, overpower, and undervoltage scenarios. Short circuit protection is also integrated. These features safeguard your components during unexpected electrical events.
Connectivity and Cabling
The PSU is fully modular, allowing you to connect only necessary cables. It provides one 20+4 pin ATX connector and a 4+4 pin CPU connector. For graphics, it offers three 6+2 pin PCIe connectors and one 16-pin connector. Storage drives connect via four SATA ports and two Molex ports.
Box contents
- ASUS TUF-GAMING-850G-EVO PSU unit
- Modular cable set (CPU, PCIe, SATA, Peripheral)
- AC power cord
- Mounting screws
- User documentation
Check before you buy
- Confirm your case supports an ATX form factor PSU (140 mm width).
- Verify your wall outlet uses a standard UK 3-pin plug (PSU input is 100-240V).
- Check that your motherboard has a 20+4 pin ATX connector.
- Ensure your GPU requires the provided 16-pin or 6+2 pin connectors.
Frequently Asked Questions
Q: Is this PSU compatible with UK mains voltage?
A: Yes, it supports 100-240V AC input, suitable for UK standards.
Q: Does it come with a UK power cable?
A: The input is standard IEC; confirm a UK 3-pin cable is included or required.
Q: Is the 16-pin cable compatible with RTX 40-series?
A: Yes, it is bundled for PCIe Gen 5.1 graphics cards.
Q: What is the fan size and bearing type?
A: It uses a 135mm fan with dual-ball bearings for longevity.
Q: Are the cables detachable?
A: Yes, the PSU features a fully-modular cabling system.
The Consultant’s verdict & warranty
This unit suits PC gamers building a reliable system with modern graphics cards. It offers efficient power delivery and future-proof ATX 3.1 support. The durable construction makes it a solid choice for long-term use. Covered by the standard Manufacturer Warranty.

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