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NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics P vs MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe

Updated August 2026The NZXT C850 SFX Gold excels in compact builds with premium features, while the MONTECH Century II offers great value for traditional setups.

The NZXT C850 SFX Gold excels in compact builds with premium features, while the MONTECH Century II offers great value for traditional setups.

Why NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics P is better

Compact Design

SFX form factor ideal for small builds

Cooling Features

Includes Zero RPM mode for silent operation

Efficiency Rating

Higher Cybenetics Platinum efficiency rating

Why MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe is better

Price

Significantly cheaper at £80.04

Warranty

Offers a 10-year warranty

Modular Design

Fully modular for easier installation

Overall score

NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics P
85
MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe
70

Specifications

SpecNZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics PMONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe
Power Output850W850W
Certification80 Plus Gold80 Plus Gold
Connector Type12V-2x612V-2x6
Fan TypeFDB FanNot specified
ModularNoYes

Dimension comparison

NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics PMONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe

Overview of the Power Supplies

In the realm of power supplies, the NZXT C850 SFX Gold and MONTECH Century II stand out as strong contenders, with the former priced at £129.98 and the latter at £80.04. Both power supplies offer 850W capacity and boast 80 Plus Gold certification, ensuring high efficiency. However, their design and intended use differ significantly, catering to different segments of the gaming and PC-building community.

Design and Form Factor

The NZXT C850 SFX Gold is designed specifically for compact builds, utilising the SFX form factor to maximise space efficiency. This makes it an ideal choice for small form factor (SFF) cases, where space is at a premium. In contrast, the MONTECH Century II is a standard ATX power supply, which is more suited for traditional gaming rigs. The SFX design of the NZXT allows it to fit snugly into tighter spaces, while the ATX format of the MONTECH offers greater compatibility with a wider range of standard cases.

Performance and Efficiency

Both power supplies are 80 Plus Gold certified, indicating they excel in energy efficiency, but the NZXT C850 SFX Gold goes a step further with a Cybenetics Platinum efficiency rating. This guarantees that it operates with even lower heat output and higher efficiency under load compared to many competitors. The MONTECH Century II also holds a Cybenetics Platinum rating, ensuring reliable performance, yet it is specifically noted for its fully modular design, which allows users to connect only the cables they need, reducing clutter and improving airflow.

Cooling Solutions

Cooling is a critical aspect of any power supply, and the NZXT C850 SFX Gold features a 92 mm fluid dynamic bearing fan that not only provides efficient cooling but also includes a Zero RPM mode for silent operation during low loads. This is particularly beneficial for users who prioritise quiet performance in their builds. On the other hand, the MONTECH Century II does not specify a particular fan type but highlights its fully modular capability. While it promises effective cooling, it does not offer the same specific silent operation features as the NZXT.

Connectivity Options

The NZXT C850 SFX Gold is equipped with a 600W 12V-2x6 connector, ensuring compatibility with modern graphics cards and providing robust power delivery. This is particularly relevant for high-performance gaming systems requiring reliable GPU power. The MONTECH Century II also comes with a 12V-2x6 cable, making it ATX 3.1 and PCIe 5.1 ready. This makes both power supplies suitable for contemporary gaming setups, but the NZXT’s focus on SFX design may appeal more to compact builds, while MONTECH's standard ATX design provides flexibility for larger systems.

Warranty and Durability

The MONTECH Century II offers a generous 10-year warranty, reflecting confidence in its durability and performance over time. This long warranty period can be a significant factor for consumers concerned about longevity and reliability in their power supplies. While the NZXT C850 SFX Gold does not explicitly mention its warranty duration in the provided data, the focus on premium materials and design suggests a commitment to quality. However, consumers may want to verify warranty specifics directly with the manufacturer.

User Experience and Installation

Installation experience can vary significantly between these two models. The NZXT C850 SFX Gold’s compact SFX form factor could complicate installation in larger cases, although it excels in smaller builds. Its design prioritises space-saving without sacrificing power. Conversely, the MONTECH Century II’s fully modular setup simplifies the installation process by allowing users to choose only the necessary cables, reducing clutter and improving airflow, which is especially beneficial in larger cases.

Pricing and Value

The most striking difference between the two power supplies is their price. The NZXT C850 SFX Gold is priced at £129.98, while the MONTECH Century II is significantly cheaper at £80.04. This price difference reflects their intended market segments; the NZXT targets users looking for premium components for compact builds, while the MONTECH aims to provide solid performance at a more accessible price point. For budget-conscious gamers, the MONTECH offers excellent value, but those seeking specialised compact solutions might find the NZXT worth the investment.

Which should you buy?

Choosing between the NZXT C850 SFX Gold and the MONTECH Century II ultimately depends on your specific needs. If you have a compact build and desire a power supply that offers high efficiency, silent operation, and premium features, the NZXT C850 SFX Gold is the way to go, despite its higher price of £129.98. However, if you're looking for a reliable power supply that offers excellent performance at a lower price point of £80.04, the MONTECH Century II stands out as an outstanding choice for traditional gaming setups.

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NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics P vs MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe | versusfinder