As high-performance hardware becomes the new standard, power supplies are under more pressure to deliver stable and efficient output. With the RTX 50 series entering the mainstream, there’s now a greater need for units that can handle higher wattages without breaking the bank. EINAREX, a new name in PC hardware, introduced its Nexus series at CES earlier this year. This lineup includes cases, coolers, fans, and power supplies, with the Nexus L1 aimed at users building mid-to-high-end systems. Designed to support ATX 3.1 and PCIe 5.1 standards, the Nexus L1 comes with Cybenetics Gold efficiency and capacities ranging from 750W to 1000W.
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The Einarex Nexus L1 uses a fully modular layout, making installation easier and improving airflow by eliminating unnecessary cables. Flat, low-profile cables contribute to a cleaner build, while the 12V-2×6 connector provides compatibility with the latest graphics cards. Built-in protections like SCP, OVP, UVP, OPP, and OCP, along with active PFC, give added safety for both the PSU and connected hardware. These features place the Nexus L1 in a position to meet the needs of modern gaming and workstation builds without pushing into ultra-premium pricing.
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A 120mm fluid dynamic bearing fan takes care of cooling, with Cybenetics Silence certification to keep noise levels down even under heavier loads. This makes the Nexus L1 suitable for setups where both performance and low noise are priorities. With its combination of efficiency, safety features, and next-generation support, the Nexus L1 looks ready to take on the challenges of powering today’s demanding systems. In this review, we’ll see how it performs under real-world conditions and whether it delivers on its promises.
Specification
| Features | Details |
|---|---|
| Form Factor | Intel ATX 12V |
| Total Wattage | 850W |
| Electric Protection | SCP, UVP, OVP, OPP, OTP, OCP, SIP, Active PFC |
| Dimensions | 140 × 150 × 86 mm |
| AC Input | 100–240VAC, 6A–12A, 47–63Hz |
| CYBENETICS Certifications | GOLD |
| Safety Certifications | CE, RoHS, UKCA, CB, FCC |
| Main 24P | x1 |
| EPS12V 8P/4P | x2 |
| PCI-E 8P/6P | x4 |
| 12V-2×6 (12+4P) | x1 |
| SATA | x8 |
| Peripheral 4P | x3 |
Unboxing
The Einarex Nexus L1 850W comes in a black box with blue accents and a clean design. The front shows the PSU with the brand logo, model name, and key certifications like 80 PLUS Gold and Cybenetics Standard++. On the back, there’s a detailed spec sheet listing ATX 3.1 and PCIe 5.1 support, 2x CPU and 3x GPU power excursion, and a clear power table with a max 846W on the +12V rail. Both side panels list protection features such as SCP, UVP, OVP, OPP, OTP, OCP, and SIP. A small graph shows efficiency across different loads, and a 10-year warranty badge adds to the overall presentation.
Inside the box, you’ll find the power supply unit itself, featuring a decently sized fan for cooling. There’s a 24-pin ATX cable, two EPS 12V 8-pin/4-pin cables for CPU power, and four PCIe 8-pin/6-pin connectors to support graphics cards. It also includes a 12V-2×6 (12+4-pin) cable for newer GPUs, eight SATA power connectors for drives, and three 4-pin Molex cables for legacy devices. A printed manual is provided along with a QR code linking to a digital version for easy access during setup.
Design
The build quality of the Einarex Nexus L1 850W is solid for its class. The metal casing is made from SECC steel with a matte black coating that resists fingerprints and minor scratches. There are no sharp edges around the unit, and all corners are smoothly finished, which reduces the risk of accidental cuts during installation. The casing panels fit together tightly with no gaps or flexing, showing good attention to manufacturing tolerances.
The Einarex Nexus L1 850W has a clean and beautiful design that fits well with most modern PC builds. The matte black finish is paired with subtle blue lines, giving it a simple yet appealing appearance. From the top, the 120mm fan is housed under a metal grille that provides good airflow and protection against dust. The blue fan blades add a touch of color without being distracting. The casing feels solid and well-constructed, with no signs of flexing or loose parts during handling.
The label on the bottom of the unit lists all electrical specifications and certifications. It displays the Cybenetics Gold efficiency badge and confirms ATX 3.1 compliance. The specifications show a single +12V rail rated at 70.5A, along with the standard +5V, +3.3V, -12V, and +5VSB rails. This provides enough power for high-performance components while meeting safety standards with protections like OVP, UVP, OPP, SCP, OTP, and OCP.
Both side panels carry the Einarex branding in white lettering, accompanied by a single blue stripe across the surface. The approach here is minimal, keeping the look professional and easy to integrate into a variety of setups, whether the PSU is visible through a case window or hidden behind a shroud. The branding is not overly large, which helps maintain a balanced visual style.
The front panel houses the modular cable interface. All connector types are clearly labeled for easy installation, covering the 24-pin motherboard, CPU/EPS, PCIe, and SATA/Molex connections along with a 12V 2×6-pin PCIe power connector. The modular system allows builders to use only the cables they need, which helps reduce clutter and improve case airflow. The cables provided are standard black-sleeved types that are functional, though they lack any premium finish. The yellow caution sticker warns that tampering with it will void the warranty, a standard measure to prevent unauthorized access.
At the rear, the PSU features a honeycomb-style ventilation design for efficient heat dissipation. This section also includes a standard IEC C14 power socket and a power switch. The layout is easy to access once installed. The honeycomb design is a common solution for airflow management and serves its purpose effectively. A small blue accent continues the color theme but does not affect functionality.
Internal Components
A closer look inside the Einarex Nexus L1 reveals the use of PG series electrolytic capacitors, such as the PG448C rated at 16V 820µF. These capacitors are rated for 105°C, which is a standard specification to handle higher operating temperatures and ensure reliable performance over time. Positioned on the secondary side, they play a key role in filtering the DC rails, helping to reduce ripple and electrical noise. This contributes to delivering clean and stable power to the system, which is essential for maintaining the longevity of connected components.
Through the rear honeycomb grille, the internal arrangement becomes more visible, showing copper coils, yellow safety-rated parts, and the DC-DC converter area. This setup allows for independent regulation of the +3.3V and +5V rails, which helps keep voltages stable under varying system loads. A dedicated DC controller oversees power allocation across these rails, supporting consistent operation even with fluctuating power demands. The layout also provides enough open space to aid airflow, letting the cooling fan maintain temperatures effectively during long gaming or workstation use.
Once installed, the Einarex Nexus L1 fits neatly and blends well with cases that share a similar color palette. The fully modular design makes cable management easier, and the sleeved cables add a touch of durability and visual appeal. However, the cable sleeving feels a little thinner than what you might expect from higher-tier units. Even so, organizing the cables is simple, and the power supply integrates nicely into both clean and more visually complex builds.
Cables & Connectors
The Einarex Nexus L1 850W offers a fully modular design that makes it easy to keep the system build clean and organized. Users can connect only the cables they need, which helps reduce unnecessary clutter and improves airflow inside the case. The modular interface is clearly labeled with white text, making it straightforward to match connectors during installation. This setup is especially useful in mid-tower or smaller cases where space management is important.
The included cable set is well-suited for most modern systems. It provides a 24-pin ATX motherboard cable, two 4+4-pin EPS12V CPU power cables, and four 6+2-pin PCIe cables for graphics cards. In addition, there is a 12V 2×6-pin PCIe power connector for high-end GPUs requiring the newer standard. For storage and peripherals, there are eight SATA connectors split across two cables and four Molex connectors. A floppy adapter is also present, though it is rarely needed in current builds. The range of connectors ensures compatibility with dual GPU setups, multiple storage devices, and next-generation graphics cards.
Each cable is covered in black braided nylon sleeving that gives a clean look and basic protection. While the sleeving does not have the premium braided texture of higher-end models, it is consistent and practical. The cables are flexible enough to be routed through tight spaces behind the motherboard tray, helping maintain a neat appearance. The 24-pin ATX cable is slightly stiffer because of its larger wire bundle, but it can still be managed with some planning during the build process.
The PCIe and EPS12V cables use standard 18AWG wiring, which is common for PSUs in this category. The connectors feel sturdy and fit securely into their sockets, providing a reassuring click when fully seated. This reduces the chance of accidental disconnection when moving or adjusting the system. The cables are of standard round design rather than flat ribbon style, which may not appeal to those aiming for a highly polished aesthetic. For most users, however, the bundled cables are more than sufficient in terms of build quality and length.
Performance & Testing
During testing, the Einarex Nexus L1 850W was paired with a demanding system to check its performance under real-world loads. The setup included an Intel Core i7-13700K, MAXSUN iCraft B760M CROSS motherboard, 32GB of DDR5-7600 memory, and an AORUS RTX 4080 SUPER MASTER. The PSU delivered efficiency levels matching its Cybenetics Gold rating, staying above 90% at 50% load and maintaining over 87% at both low and high loads. This level of efficiency helps reduce unnecessary heat and supports stable operation over long periods.
Voltage regulation was reliable across all rails during stress testing. The +12V rail, which supplies most of the system’s power, showed minimal deviation within ±1.5% under a 750W simulated load. The +5V and +3.3V rails also performed steadily without noticeable drops or spikes. Ripple levels measured on the +12V rail peaked at around 45mV under full load, which is well within ATX specifications and safe for modern hardware. While the ripple control does not match premium units, it remains adequate for gaming and workstation systems.
The thermal and Noise performance was also handled well. The 120mm cooling fan stayed quiet during light and moderate loads and only increased speed past 60% load. At full load, noise levels reached about 32 dBA, which is reasonable for most users. The honeycomb rear vent allowed good airflow, helping the unit stay cool even during extended high-power tests. Built-in protections like overcurrent, overvoltage, and short-circuit shutdowns worked properly during fault simulations, cutting power quickly to prevent damage. These features add peace of mind for systems running high-power components.
Conclusion
The Einarex Nexus L1 850W Power Supply is available now. For more information, visit the official Einarex website. For detailed tech reviews, click here.
